refactor: migrate region failover implementation to region migration #4172
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WalkthroughThe recent changes involve extensive updates in the Changes
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Actionable comments posted: 3
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Files selected for processing (22)
- src/common/meta/src/key.rs (1 hunks)
- src/common/meta/src/key/flow.rs (7 hunks)
- src/common/meta/src/key/flow/flow_name.rs (4 hunks)
- src/common/meta/src/key/flow/flownode_flow.rs (2 hunks)
- src/datanode/src/heartbeat/handler/close_region.rs (2 hunks)
- src/datanode/src/heartbeat/handler/downgrade_region.rs (2 hunks)
- src/datanode/src/heartbeat/handler/open_region.rs (2 hunks)
- src/datanode/src/heartbeat/handler/upgrade_region.rs (2 hunks)
- src/meta-srv/src/failure_detector.rs (2 hunks)
- src/meta-srv/src/handler/failure_handler.rs (3 hunks)
- src/meta-srv/src/metasrv.rs (6 hunks)
- src/meta-srv/src/metasrv/builder.rs (3 hunks)
- src/meta-srv/src/procedure.rs (1 hunks)
- src/meta-srv/src/procedure/region_migration.rs (7 hunks)
- src/meta-srv/src/procedure/region_migration/manager.rs (7 hunks)
- src/meta-srv/src/procedure/region_migration/test_util.rs (5 hunks)
- src/meta-srv/src/region.rs (1 hunks)
- src/meta-srv/src/region/failure_detector.rs (1 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
- src/meta-srv/src/selector.rs (1 hunks)
- src/meta-srv/src/selector/test_utils.rs (1 hunks)
- src/meta-srv/src/test_util.rs (2 hunks)
Files not reviewed due to errors (1)
- src/datanode/src/heartbeat/handler/close_region.rs (no review received)
Files skipped from review due to trivial changes (3)
- src/common/meta/src/key/flow.rs
- src/meta-srv/src/procedure.rs
- src/meta-srv/src/region.rs
Additional comments not posted (39)
src/datanode/src/heartbeat/handler/downgrade_region.rs (1)
45-45: Refined Error Handling: Consistent with Rust PracticesThe use of
format!("{err:?}")for error handling aligns well with Rust's idiomatic use of debug formatting to handle errors. Ensure that similar error handling is applied consistently across other modules.src/datanode/src/heartbeat/handler/open_region.rs (1)
45-45: Consistent Error Handling: Good Use of Debug FormattingThe modification to handle errors using
format!("{e:?}")is a good practice in Rust for detailed error messages, especially when logging or debugging. Check that this pattern is consistently used in similar contexts throughout the codebase.src/meta-srv/src/selector.rs (1)
19-20: Approved addition of the test_utils module.The new
test_utilsmodule is appropriately scoped withpub(crate)visibility, which is suitable for internal testing purposes. This is a good practice as it prevents the test utilities from being exposed as part of the public API, while still allowing them to be shared across different parts of the crate if necessary.src/meta-srv/src/region/failure_detector.rs (1)
26-107: Approved implementation of RegionFailureDetector.The
RegionFailureDetectoris well-implemented with thread-safe mechanisms usingDashMap. Methods are correctly scoped withpub(crate)visibility where necessary, and the use of conditional compilation for test-specific methods is a good practice. This ensures that test code does not end up in production binaries, which can lead to reduced binary size and potentially fewer security risks.src/meta-srv/src/handler/failure_handler.rs (1)
Line range hint
24-53: Approved changes in RegionFailureHandler.The
RegionFailureHandlerhas been refactored to interact with theRegionSupervisoreffectively. The asynchronous handling of the supervisor's run loop and the heartbeat sending mechanism are correctly implemented using modern Rust async patterns. This should enhance the reliability and scalability of the failure handling process.src/meta-srv/src/test_util.rs (1)
Line range hint
21-130: Approved utility functions in test_util.rs.The utility functions provided in
test_util.rsare well-implemented and serve to simplify the setup of test environments. These functions abstract common tasks such as creating selector contexts and preparing table metadata, which facilitates easier and more effective testing. The asynchronous patterns used are appropriate and correctly implemented.src/common/meta/src/key/flow/flow_name.rs (2)
48-48: Conditional Compilation for TestingThe method
catalogis conditionally compiled only for testing, which is a good practice as it limits the scope of test-related code to test builds only.
54-54: Conditional Compilation for TestingSimilarly, the method
flow_nameis also conditionally compiled for testing. This approach ensures that these methods do not affect the production binary, reducing the potential for unintended side effects.src/common/meta/src/key/flow/flownode_flow.rs (1)
82-82: Conditional Compilation for TestingThe method
flownode_idis conditionally compiled for testing. This is consistent with best practices for managing code that is only relevant in test environments.src/datanode/src/heartbeat/handler/upgrade_region.rs (1)
109-109: Improved Error HandlingThe change to include detailed error information using
format!("{err:?}")enhances error visibility and debugging capability. It's crucial for maintaining robust error handling practices in distributed systems.src/meta-srv/src/metasrv/builder.rs (1)
Line range hint
69-402: Significant Refactoring for Region SupervisionThe introduction of
RegionSupervisorand its integration into the system throughregion_supervisor_tickerrepresents a substantial enhancement in managing region failover and migration. The detailed setup and conditional inclusion based on configuration flags are well-implemented. However, ensure that the extensive changes are covered by integration tests to verify the correct behavior under various scenarios.Verification successful
Integration Tests for Region Supervision
The search results indicate that there are indeed integration tests that cover functionalities related to
RegionSupervisorandregion_supervisor_ticker, specifically within thetests-integration/tests/region_failover.rsandtests-integration/tests/region_migration.rsfiles. These tests likely cover various scenarios for region failover and migration, ensuring that the newRegionSupervisorfunctionality is tested.
- Files to verify:
tests-integration/tests/region_failover.rstests-integration/tests/region_migration.rsScripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify integration tests cover new changes in region supervision. # Test: Search for integration tests related to region supervision. rg --type rust $'RegionSupervisor|region_supervisor_ticker'Length of output: 3399
Script:
#!/bin/bash # Description: Identify potential integration test files and search for RegionSupervisor related terms. # Step 1: Find potential integration test files. fd 'test' --type d # Step 2: Search for RegionSupervisor related terms within identified test files. fd 'test' --type d --exec rg --type rust 'RegionSupervisor|region_supervisor_ticker' {}Length of output: 728
Script:
#!/bin/bash # Description: Search for test files within identified directories and examine if they cover new functionality. # Step 1: List all Rust test files within the identified directories. fd --type f --extension rs --search-path src/auth/tests/ --search-path src/cmd/tests/ --search-path src/common/base/tests/ --search-path src/common/datasource/tests/ --search-path src/common/grpc/tests/ --search-path src/common/macro/tests/ --search-path src/common/meta/src/ddl/test_util/ --search-path src/common/meta/src/ddl/tests/ --search-path src/common/procedure-test/ --search-path src/common/test-util/ --search-path src/log-store/src/test_util/ --search-path src/mito2/src/manifest/tests/ --search-path src/mito2/src/test_util/ --search-path src/object-store/tests/ --search-path src/operator/src/tests/ --search-path src/pipeline/tests/ --search-path src/puffin/src/tests/ --search-path src/query/src/tests/ --search-path src/script/src/python/ffi_types/pair_tests/ --search-path src/servers/tests/ --search-path src/table/src/test_util/ --search-path tests/ --search-path tests-fuzz/ --search-path tests-integration/ --search-path tests-integration/src/tests/ --search-path tests-integration/tests/ # Step 2: Search for relevant test functions or modules within these files. fd --type f --extension rs --search-path src/auth/tests/ --search-path src/cmd/tests/ --search-path src/common/base/tests/ --search-path src/common/datasource/tests/ --search-path src/common/grpc/tests/ --search-path src/common/macro/tests/ --search-path src/common/meta/src/ddl/test_util/ --search-path src/common/meta/src/ddl/tests/ --search-path src/common/procedure-test/ --search-path src/common/test-util/ --search-path src/log-store/src/test_util/ --search-path src/mito2/src/manifest/tests/ --search-path src/mito2/src/test_util/ --search-path src/object-store/tests/ --search-path src/operator/src/tests/ --search-path src/pipeline/tests/ --search-path src/puffin/src/tests/ --search-path src/query/src/tests/ --search-path src/script/src/python/ffi_types/pair_tests/ --search-path src/servers/tests/ --search-path src/table/src/test_util/ --search-path tests/ --search-path tests-fuzz/ --search-path tests-integration/ --search-path tests-integration/src/tests/ --search-path tests-integration/tests/ --exec rg --type rust 'test|mod' {}Length of output: 125542
src/meta-srv/src/procedure/region_migration/manager.rs (10)
43-44: Introduced RegionMigrationProcedureTracker in RegionMigrationManagerThe addition of
trackerinRegionMigrationManageris a key part of facilitating the management of ongoing migrations. This aligns with the PR's objective to enhance region migration handling.
46-49: RegionMigrationProcedureTracker struct definitionThe
RegionMigrationProcedureTrackerstruct is properly defined with anArc<RwLock<>>for thread-safe access torunning_procedures. This design ensures that concurrent access to the tracking of running procedures is handled safely.
51-69: Insert Running Procedure LogicThe method
insert_running_procedureproperly checks if a migration task is already running for a given region and handles it accordingly. UsingEntryfor efficient key-value operations is a good practice.
71-78: Getter for Specific Migration TaskThe method
getretrieves a specificRegionMigrationProcedureTaskif it exists. This is a straightforward and efficient retrieval using the region ID.
81-87: Testing Utility for Procedure TrackerThe
containsmethod under the test configuration is a useful utility for asserting the presence of a task for a given region ID in tests. This helps in ensuring the tracker's functionality is correctly implemented.
98-108: Proper Cleanup in Drop ImplementationThe
dropimplementation forRegionMigrationProcedureGuardensures that the task is removed fromrunning_proceduresupon guard destruction, which is crucial for managing lifecycle and state consistency.
150-158: Constructor for RegionMigrationManagerThe constructor method
newinitializes theRegionMigrationManagerwith a default tracker. This ensures that the manager is ready to handle procedures upon instantiation.
162-165: Accessor for Procedure TrackerThe method
trackerprovides a safe way to access theRegionMigrationProcedureTracker, which is essential for other components to interact with ongoing migration tasks.
170-177: Procedure Registration with Cloned TrackerIn the
try_startmethod, cloning the tracker for use in the closure ensures that the tracker's state is correctly maintained across asynchronous calls, which might be necessary for the lifecycle of migration procedures.
[APROVED]
190-190: Delegate Method for Inserting Running ProcedureThe
insert_running_proceduremethod inRegionMigrationManagerproperly delegates to the tracker's corresponding method, maintaining separation of concerns.src/meta-srv/src/region/supervisor.rs (6)
85-115: RegionSupervisorTicker Start Method ImplementationThe
startmethod inRegionSupervisorTickercorrectly handles the initialization of a background job for generating tick events. The use of a mutex to guard thetick_handleensures that the ticker is not started multiple times concurrently.
118-131: Stopping Mechanism for TickerThe
stopmethod and the correspondingdropimplementation ensure that the ticker is stopped and resources are cleaned up properly when theRegionSupervisorTickeris no longer in use. This is crucial for preventing resource leaks.
178-198: Constructor for RegionSupervisorThe constructor for
RegionSupervisoris well-defined, initializing all necessary components and ensuring that the system is ready for operation. The detailed setup of components likefailure_detectorandtable_metadata_managerindicates thorough planning in the system's architecture.
200-204: Heartbeat Sender UtilityThe
heartbeat_sendermethod provides a clean utility for other components to send heartbeats to theRegionSupervisor. This encapsulation enhances modularity.
207-213: Ticker Accessor in RegionSupervisorThe method
tickerprovides a safe and encapsulated way to access theRegionSupervisorTicker. This method is essential for controlling the tick generation externally if needed.
216-233: Main Loop Implementation in RegionSupervisorThe
runmethod's implementation handles different types of events effectively, showcasing good use of pattern matching in Rust. The handling of each event type is clear and concise, contributing to the robustness of the supervisor's functionality.src/meta-srv/src/metasrv.rs (3)
57-57: Added import ofRegionSupervisorTickerRefThis import is essential for the newly introduced
region_supervisor_tickerfield. Ensure that the rest of the codebase is updated to accommodate this new import where necessary.
270-270: Field addition:region_supervisor_tickerinMetaStateHandlerandMetasrvThe addition of the
region_supervisor_tickerfield in bothMetaStateHandlerandMetasrvis aligned with the PR's objective to enhance region failover mechanisms. This field appears to be well integrated with the existing architecture, particularly with respect to state transitions and leader election processes.Also applies to: 351-351
Line range hint
275-287: Enhancements to leader and follower state transitionsThe modifications in the
on_become_leaderandon_become_followermethods to start and stop theregion_supervisor_tickerare logical and necessary for the new region migration strategy. These changes help in managing the lifecycle of region supervisors effectively.Also applies to: 299-311
src/meta-srv/src/failure_detector.rs (2)
66-66: Modification toPhiAccrualFailureDetectorOptionsThe change to make
PhiAccrualFailureDetectorOptionsderiveCloneandCopyis a sensible enhancement. It simplifies the handling of these options across the system, allowing for easier configuration and replication of settings.
198-198: Structural changes toHeartbeatHistoryThe introduction of
HeartbeatHistorystruct encapsulates the heartbeat statistics effectively. This struct is crucial for the new failure detection logic, particularly in maintaining a history of heartbeat intervals to calculate variances and standard deviations accurately.src/meta-srv/src/procedure/region_migration/test_util.rs (2)
99-101: Approved the addition of new fields to the TestingEnv struct.The addition of
trackerandkv_backendfields toTestingEnvaligns well with the PR's objectives to enhance region migration capabilities.
134-142: Approved the new utility functions in TestingEnv.The addition of
kv_backend()andtracker()utility functions is crucial for accessing the new fields inTestingEnvand supports the enhanced functionality related to region migration.src/meta-srv/src/procedure/region_migration.rs (4)
46-46: Import of New TypesThe imports for
RegionMigrationProcedureGuardandRegionMigrationProcedureTrackerhave been added. This is consistent with the refactoring to use these types in the migration procedure management. Ensure all uses of these types are appropriate and that their lifecycle is well managed to prevent resource leaks or concurrency issues.
409-415: Tracking Migration ProceduresThe insertion of a running procedure into the
RegionMigrationProcedureTrackeris a critical operation. It ensures that migrations do not overlap or interfere with each other. This snippet effectively ties the lifecycle of a migration procedure to its tracking, which is essential for maintaining consistency and preventing data races.
22-22: Visibility Change for Test UtilitiesThe visibility of the
test_utilmodule has been changed frompub(crate)topub. This makes it accessible from outside the crate, which could be intended for broader testing use, but ensure this does not expose internal test utilities unnecessarily.Verification successful
Visibility Change for Test Utilities
The
test_utilmodule is indeed used in various non-test contexts, which justifies the change in its visibility frompub(crate)topub.
src/meta-srv/src/procedure/region_migration.rssrc/meta-srv/src/region/supervisor.rssrc/meta-srv/src/selector/round_robin.rssrc/meta-srv/src/procedure/region_failover.rssrc/meta-srv/src/procedure/utils.rssrc/meta-srv/src/handler/region_lease_handler.rssrc/meta-srv/src/handler/failure_handler.rsScripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify that the `test_util` module is only used where appropriate. # Test: Search for the usage of `test_util` in non-test contexts. Expect: No occurrences. rg --type rust --glob '!*test.rs' 'test_util'Length of output: 31658
371-371: Introduction of Guard to ProcedureThe
_guardfield has been introduced toRegionMigrationProcedure. This likely serves as a management or safety mechanism to ensure that resources are properly cleaned up or that certain conditions are met before the procedure is disposed of. It's important to verify that this guard is used effectively throughout the procedure's lifecycle.src/common/meta/src/key.rs (1)
95-95: Added new moduleview_info.The addition of the
view_infomodule is consistent with the changes in the AI-generated summary and the PR objectives, which aim to improve metadata management. This new module likely contains logic specific to managing view-related metadata, which is a good separation of concerns.
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Actionable comments posted: 4
Outside diff range and nitpick comments (2)
src/meta-srv/src/region/supervisor.rs (2)
41-47: Refine the TODO comment for future clarity.The
TODOcomment in theDatanodeHeartbeatstruct suggests considering the inclusion of memtable size. It would be beneficial to provide more context or create a tracking issue in your project management tool to ensure this doesn't get overlooked.
140-156: Clarify the purpose ofTODOin theRegionSupervisorstruct.There's a
TODOcomment on line 153 without a clear action item or issue reference. It's good practice to linkTODOcomments with an issue tracker ID or provide a more descriptive comment to ensure they are actionable.
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- src/meta-srv/src/region/supervisor.rs (1 hunks)
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src/meta-srv/src/region/supervisor.rs (1)
394-536: Verify the test coverage for new functionalities.The tests in this file appear to cover basic scenarios for the
RegionSupervisorandRegionSupervisorTicker. Ensure that these tests adequately cover all new logic, particularly edge cases and failure scenarios, to maintain robustness.
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Files selected for processing (3)
- src/common/meta/src/wal_options_allocator.rs (1 hunks)
- src/meta-srv/src/metasrv.rs (6 hunks)
- src/meta-srv/src/metasrv/builder.rs (5 hunks)
Files skipped from review as they are similar to previous changes (2)
- src/meta-srv/src/metasrv.rs
- src/meta-srv/src/metasrv/builder.rs
Additional comments not posted (1)
src/common/meta/src/wal_options_allocator.rs (1)
91-94: New methodis_remote_walis correctly implemented and well-integrated.This method effectively checks if the current WAL options allocator is set to use Kafka, which implies a remote WAL setup. The usage of the
matches!macro is appropriate for this kind of type-checking and enhances readability.
Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #4172 +/- ##
==========================================
- Coverage 85.11% 84.62% -0.49%
==========================================
Files 1031 1039 +8
Lines 181828 182758 +930
==========================================
- Hits 154759 154657 -102
- Misses 27069 28101 +1032 |
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Files selected for processing (4)
- src/meta-srv/src/error.rs (2 hunks)
- src/meta-srv/src/procedure/region_migration/manager.rs (7 hunks)
- src/meta-srv/src/procedure/region_migration/test_util.rs (5 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
Files skipped from review as they are similar to previous changes (3)
- src/meta-srv/src/procedure/region_migration/manager.rs
- src/meta-srv/src/procedure/region_migration/test_util.rs
- src/meta-srv/src/region/supervisor.rs
Additional comments not posted (1)
src/meta-srv/src/error.rs (1)
844-849: New Error Variant Added: RegionLeaderNotFoundThe addition of the
RegionLeaderNotFounderror variant is consistent with the PR's objective to enhance region management and failover procedures. This specific error will provide clearer diagnostics when a region's leader cannot be found, which is crucial for debugging and operational transparency.Ensure that wherever this error is potentially raised, appropriate handling logic is also implemented to either retry the operation or fail gracefully.
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Outside diff range and nitpick comments (1)
src/meta-srv/src/region/supervisor.rs (1)
62-68: Consider isolating theDumpvariant more effectively from production code.The
Eventenum includes aDumpvariant used for testing, which is guarded by acfg(test)attribute. Ensure that this does not expose any sensitive information or unnecessarily bloat the production binary. If it's solely for testing, consider ways to isolate it more effectively from the production code.
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- src/meta-srv/src/region/supervisor.rs (1 hunks)
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src/meta-srv/src/region/supervisor.rs (1)
358-396: Review the logic indo_failoverfor potential race conditions and ensure robust error handling.The
do_failovermethod checks if a region is currently migrating and skips failover if so. While this logic is sound, it could benefit from more robust error handling and clearer logging to improve maintainability and traceability of failover operations.
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- src/meta-srv/src/handler/failure_handler.rs (3 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
Additional comments not posted (5)
src/meta-srv/src/handler/failure_handler.rs (3)
20-21: Ensure appropriate imports and usage.The newly added imports for
DatanodeHeartbeat,HeartbeatAccepter, andRegionSupervisorare essential for the refactored functionality. Make sure these are used correctly throughout the codebase to support the new region failure handling logic.
24-31: Initialization ofRegionFailureHandlerappears robust.The constructor method
newproperly initializes theRegionFailureHandlerby extracting theheartbeat_accepterfromregion_supervisorand starting the supervisor asynchronously. This ensures that the heartbeat handling is decoupled from the supervisor's lifecycle, which is a good practice for maintainability and reliability.
80-99: Unit test forhandle_heartbeatmethod is well-implemented.The test
test_handle_heartbeatappropriately checks the functionality of handling heartbeats by simulating a supervisor and sending a heartbeat event. This is crucial for ensuring the robustness of the heartbeat handling logic in production.src/meta-srv/src/region/supervisor.rs (2)
42-60: Data structure definition forDatanodeHeartbeatis clear and concise.The
DatanodeHeartbeatstruct is well-defined with appropriate fields for cluster ID, datanode ID, regions, and timestamp. This struct will effectively carry the necessary data for heartbeat processing.
189-216: Constructor method forRegionSupervisoris well-structured.The constructor for
RegionSupervisoreffectively initializes all components necessary for region supervision, including failure detection, event handling, and region migration management. This method sets a solid foundation for the robust operation of region supervision.
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Outside diff range and nitpick comments (2)
src/meta-srv/src/handler/failure_handler.rs (2)
24-31: Consider using structured concurrency for spawned tasks.The asynchronous task spawned in the
newmethod forregion_supervisoris detached from any lifecycle management, potentially leading to orphaned tasks if the spawning object is dropped. Rust's async ecosystem supports structured concurrency, which can be used to tie the lifecycle of asynchronous tasks to the surrounding environment or object.
Line range hint
80-133: Enhance test modularity and add descriptive comments.The test
test_handle_heartbeatis comprehensive but could benefit from increased modularity and descriptive comments. Breaking down the setup into smaller, reusable functions and providing detailed comments explaining each step can make the tests more maintainable and easier to understand.
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Files selected for processing (2)
- src/meta-srv/src/handler/failure_handler.rs (3 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/meta-srv/src/region/supervisor.rs
Additional comments not posted (1)
src/meta-srv/src/handler/failure_handler.rs (1)
44-53: Verify pattern matching syntax and method execution.The syntax used for pattern matching (
let Some(stat) = acc.stat.as_ref() else {) seems unconventional. Please confirm if this is valid Rust syntax or if it should be adjusted. Additionally, the methodacceptonheartbeat_acceptorwhich processes the heartbeat has been renamed tohandle_heartbeatas per previous discussions. Ensure that this change is reflected here.- .accept(DatanodeHeartbeat::from(stat)) + .handle_heartbeat(DatanodeHeartbeat::from(stat))
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Outside diff range and nitpick comments (1)
src/meta-srv/src/region/supervisor.rs (1)
63-69: Handle test-specific code appropriately.The
Dumpvariant in theEventenum is used for testing. Ensure that this does not expose sensitive information or unnecessarily bloat the production binary. Consider isolating it more effectively from production code.
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Files selected for processing (3)
- src/meta-srv/src/handler/failure_handler.rs (3 hunks)
- src/meta-srv/src/metasrv/builder.rs (5 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
Files skipped from review as they are similar to previous changes (1)
- src/meta-srv/src/metasrv/builder.rs
Additional comments not posted (7)
src/meta-srv/src/handler/failure_handler.rs (3)
17-17: Consider adding a comment for thecommon_telemetry::infoimport.It would be helpful to have a comment explaining the use of
common_telemetry::info, especially if it's not commonly used throughout the project.
25-25: Approved addition ofheartbeat_acceptor.The addition of
heartbeat_acceptorin theRegionFailureHandlerstruct aligns with the new architecture focusing on region supervision. This change facilitates better encapsulation and delegation of heartbeat handling responsibilities.
21-22: Ensure newly introduced imports are necessary.The addition of imports from
crate::region::supervisorsuggests tighter coupling with the region supervision logic. Ensure these imports are necessary and used efficiently in the context of failure handling.Verification successful
Newly introduced imports are necessary and actively used.
The imports
RegionSupervisor,HeartbeatAcceptor, andDatanodeHeartbeatfromcrate::region::supervisorare indeed used withinfailure_handler.rs. Here are the specific usages:
RegionSupervisoris used in function definitions and method calls.HeartbeatAcceptoris used as a struct field.DatanodeHeartbeatis used in method calls.These usages confirm that the imports are necessary for the functionality implemented in the file.
Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the necessity and usage of newly introduced imports in failure_handler.rs. # Test: Search for the usage of imports from `crate::region::supervisor`. rg --type rust --files-with-matches 'RegionSupervisor|HeartbeatAcceptor|DatanodeHeartbeat' src/meta-srv/src/handler/failure_handler.rsLength of output: 180
Script:
#!/bin/bash # Description: Extract lines where `RegionSupervisor`, `HeartbeatAcceptor`, and `DatanodeHeartbeat` are used in `failure_handler.rs`. # Extract lines containing `RegionSupervisor` rg 'RegionSupervisor' src/meta-srv/src/handler/failure_handler.rs # Extract lines containing `HeartbeatAcceptor` rg 'HeartbeatAcceptor' src/meta-srv/src/handler/failure_handler.rs # Extract lines containing `DatanodeHeartbeat` rg 'DatanodeHeartbeat' src/meta-srv/src/handler/failure_handler.rsLength of output: 777
src/meta-srv/src/region/supervisor.rs (4)
43-50: Ensure proper struct initialization and comment on TODOs.The
DatanodeHeartbeatstruct is well-defined with relevant fields. However, ensure that the TODO comment regarding memtable size collection is tracked and addressed in future iterations.
228-245: Enhance error handling in therunmethod.The
runmethod processes various events but lacks comprehensive error handling, particularly in thehandle_region_failuresfunction. This could lead to unhandled errors that might affect the stability of the system.
[REFACTOR_Suggestion]- self.handle_region_failures(regions).await; + if let Err(e) = self.handle_region_failures(regions).await { + error!(e; "Failed to handle region failures"); + }
15-18: Check the necessity of new standard library imports.The addition of
HashSet,Debug,Arc,Mutex, andDurationsuggests new functionality that involves collections, threading, and timing. Verify that these imports are used effectively in the file.Verification successful
The new imports in
supervisor.rsare effectively used.The search results confirm the usage of
HashSet,Debug,Arc,Mutex, andDurationthroughout the file. Each import is utilized in various parts of the code, indicating that they are necessary for the new functionality added to the file.
HashSet: Used in a collection operation.Debug: Used in deriving theDebugtrait for structures.Arc: Used for creating thread-safe reference-counted pointers.Mutex: Used for mutual exclusion to protect shared data.Duration: Used for time-related operations.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the usage of standard library imports in supervisor.rs. # Test: Search for the usage of `HashSet`, `Debug`, `Arc`, `Mutex`, and `Duration`. rg --type rust --files-with-matches 'HashSet|Debug|Arc|Mutex|Duration' src/meta-srv/src/region/supervisor.rsLength of output: 148
Script:
#!/bin/bash # Description: Verify the usage of each standard library import in supervisor.rs. # Test: Search for the usage of `HashSet`. rg 'HashSet' src/meta-srv/src/region/supervisor.rs # Test: Search for the usage of `Debug`. rg 'Debug' src/meta-srv/src/region/supervisor.rs # Test: Search for the usage of `Arc`. rg 'Arc' src/meta-srv/src/region/supervisor.rs # Test: Search for the usage of `Mutex`. rg 'Mutex' src/meta-srv/src/region/supervisor.rs # Test: Search for the usage of `Duration`. rg 'Duration' src/meta-srv/src/region/supervisor.rsLength of output: 1551
20-32: Review new imports for external dependencies.The imports from
common_meta,common_telemetry,snafu, andtokioare crucial for the functionality ofRegionSupervisor. Ensure that these are used appropriately and do not introduce unnecessary coupling or complexity.Verification successful
Review new imports for external dependencies.
The imports from
common_meta,common_telemetry,snafu, andtokioare indeed used throughout thesupervisor.rsfile. Their usage appears to be appropriate and necessary for the functionality ofRegionSupervisor.
common_meta: Used for various constants, key management, and peer/route definitions.common_telemetry: Utilized for logging purposes (error, info, warn).snafu: Employed for error handling using theensure,OptionExt, andResultExtmacros.tokio: Used for asynchronous operations, including channels, timers, and tests.No unnecessary coupling or complexity has been introduced by these imports.
Scripts executed
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Script:
#!/bin/bash # Description: Verify the usage of new imports from external dependencies in supervisor.rs. # Test: Check for the usage of imports from `common_meta`, `common_telemetry`, `snafu`, and `tokio`. rg --type rust --files-with-matches 'common_meta|common_telemetry|snafu|tokio' src/meta-srv/src/region/supervisor.rsLength of output: 156
Script:
#!/bin/bash # Description: Verify the usage of imports in supervisor.rs. # Check for the usage of `common_meta` imports rg --type rust 'common_meta' src/meta-srv/src/region/supervisor.rs # Check for the usage of `common_telemetry` imports rg --type rust 'common_telemetry' src/meta-srv/src/region/supervisor.rs # Check for the usage of `snafu` imports rg --type rust 'snafu' src/meta-srv/src/region/supervisor.rs # Check for the usage of `tokio` imports rg --type rust 'tokio' src/meta-srv/src/region/supervisor.rsLength of output: 1181
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Files selected for processing (16)
- src/common/meta/src/wal_options_allocator.rs (1 hunks)
- src/meta-srv/src/error.rs (2 hunks)
- src/meta-srv/src/failure_detector.rs (2 hunks)
- src/meta-srv/src/handler/failure_handler.rs (3 hunks)
- src/meta-srv/src/metasrv.rs (6 hunks)
- src/meta-srv/src/metasrv/builder.rs (5 hunks)
- src/meta-srv/src/procedure.rs (1 hunks)
- src/meta-srv/src/procedure/region_migration.rs (7 hunks)
- src/meta-srv/src/procedure/region_migration/manager.rs (7 hunks)
- src/meta-srv/src/procedure/region_migration/test_util.rs (5 hunks)
- src/meta-srv/src/region.rs (1 hunks)
- src/meta-srv/src/region/failure_detector.rs (1 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
- src/meta-srv/src/selector.rs (1 hunks)
- src/meta-srv/src/selector/test_utils.rs (1 hunks)
- src/meta-srv/src/test_util.rs (2 hunks)
Files skipped from review due to trivial changes (4)
- src/meta-srv/src/procedure.rs
- src/meta-srv/src/region.rs
- src/meta-srv/src/selector.rs
- src/meta-srv/src/test_util.rs
Additional comments not posted (25)
src/meta-srv/src/selector/test_utils.rs (1)
28-44: Ensure proper resource management in test utilities.The function
new_test_selector_contextcreates aSelectorContextusing a memory-backed key-value store and a meta peer client. It's essential to ensure that these resources are properly managed to avoid memory leaks or resource contention in test environments.src/common/meta/src/wal_options_allocator.rs (1)
92-94: Confirm the behavior ofis_remote_wal.The method
is_remote_walchecks if the WAL options are using the Kafka configuration. Ensure that this behavior is consistent with the expected use cases for remote WALs.Verification successful
The
is_remote_walmethod behavior is consistent with the expected use cases for remote WALs.
- The
WalOptionsAllocatorenum defines aKafkavariant, which is intended to represent a remote WAL.- The
is_remote_walmethod correctly identifies theKafkavariant as a remote WAL option.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify the use cases for remote WALs. # Test: Search for the usage of `is_remote_wal` method to confirm it aligns with expected behavior. rg --type rust --files-with-matches 'is_remote_wal' src/common/meta/Length of output: 113
Script:
#!/bin/bash # Description: Search for the usage of `is_remote_wal` method within the `src/common/meta/src/wal_options_allocator.rs` file. # Test: Search for the `is_remote_wal` method usage within the file to understand its context. rg 'is_remote_wal' src/common/meta/src/wal_options_allocator.rsLength of output: 105
Script:
#!/bin/bash # Description: Verify the `WalOptionsAllocator` enum for the Kafka variant and its role as a remote WAL. # Test: Search for the definition of `WalOptionsAllocator` enum and inspect its variants. rg 'enum WalOptionsAllocator' -A 10 src/common/meta/src/wal_options_allocator.rsLength of output: 344
src/meta-srv/src/procedure/region_migration/manager.rs (6)
43-44: Initialization ofRegionMigrationProcedureTrackerinRegionMigrationManager.The tracker is properly initialized in the manager's constructor. This is crucial for managing the state of ongoing migrations effectively.
51-68: Method to insert running procedures with guard management.This method correctly handles the insertion of migration tasks and returns a guard if the task can be initiated (i.e., if it isn't already running). The use of Rust's pattern matching and entry API is appropriate here.
97-107: Proper management of procedure guards in the drop implementation.The
Dropimplementation forRegionMigrationProcedureGuardensures that the task is removed from the running procedures when the guard is dropped, which is a critical cleanup step to prevent leaks or stalled migrations.
149-157: Constructor forRegionMigrationManager.The constructor initializes the manager with necessary components and sets up the tracker with a default state. This encapsulation of initialization logic in the constructor is a good practice.
161-164: Accessor for the migration tracker.Providing a method to access the tracker from the manager supports encapsulation and modularity, allowing other components to interact with the migration state without directly manipulating the internal structures.
169-176: Procedure registration with dynamic context.This method dynamically constructs a migration procedure from JSON, using cloned instances of
context_factoryandtracker. Cloning here is necessary to capture the environment for the closure, ensuring thread safety and data consistency.src/meta-srv/src/metasrv.rs (5)
57-57: Addition ofRegionSupervisorTickerReftoMetaStateHandler.The inclusion of
RegionSupervisorTickerRefinMetaStateHandlerallows the handler to manage region supervisor tick operations, which is essential for handling region failover and migration.
284-286: Starting the region supervisor ticker when becoming a leader.This logic ensures that the region supervisor ticker starts when a node becomes the leader, which is crucial for maintaining the region's health and responsiveness.
307-310: Stopping the region supervisor ticker when becoming a follower.Properly stopping the ticker when the node transitions to a follower state helps prevent unnecessary operations and resource usage, aligning with the failover and fault tolerance strategies.
351-351: Field forRegionSupervisorTickerRefinMetasrv.Adding this field to
Metasrvensures that the supervisor ticker is accessible at the server level, supporting centralized management of region supervision.
383-391: Handling leader election and state transitions.The logic here handles the complex scenario of leader elections and state transitions effectively, using cloned references to manage state and tasks asynchronously. This is a good example of handling concurrency and state management in a distributed system.
src/meta-srv/src/failure_detector.rs (2)
66-66: Trait Derivation Update:PhiAccrualFailureDetectorOptionsThe
PhiAccrualFailureDetectorOptionsstruct now derivesCopyin addition toClone,Debug,PartialEq,Serialize, andDeserialize. This change is beneficial for types that are inexpensive to copy, improving usability across the codebase.
198-198: Enhanced Debugging:HeartbeatHistoryStructThe
HeartbeatHistorystruct now derivesDebugalong withClone. This enhancement will facilitate easier debugging and logging of its instances, which is crucial for monitoring and diagnosing issues in failure detection logic.src/meta-srv/src/procedure/region_migration/test_util.rs (4)
29-29: Addition of Multiple Imports:Several new imports have been added, including
KvBackendRefandRegionMigrationProcedureTracker. These additions are necessary for the expanded functionality in the test utilities, supporting more comprehensive testing scenarios involving key-value backends and region migration tracking.
46-46: Refactoring and New Utilities in Test Environment:The addition of new imports and utilities such as
RegionMigrationAbortandUpgradeCandidateRegionindicates an expansion in the test coverage for region migration processes. This is a positive step towards ensuring more robust testing.
Line range hint
99-143: Structural Enhancements toTestingEnv:The
TestingEnvstruct has been significantly enhanced with new fields liketrackerandkv_backend, which are crucial for managing and tracking the state of region migrations in tests. These additions are essential for simulating more complex scenarios and ensuring the migration logic is thoroughly tested.
456-456: Addition ofStepEnum for Test Flow Control:The introduction of the
Stepenum is a strategic enhancement to the testing framework, allowing for more structured and readable test flow control. This change supports setting up and executing test scenarios in a more organized manner.src/meta-srv/src/region/supervisor.rs (1)
63-69: Re-evaluate the inclusion ofDumpevent in production builds.The
Dumpevent is guarded by#[cfg(test)]which is good practice. However, ensure it is strictly used for testing purposes and does not leak into production builds.src/meta-srv/src/error.rs (1)
844-849: Approval: New error variantRegionLeaderNotFoundis well-defined.The addition of the
RegionLeaderNotFounderror variant is well-structured and integrates seamlessly with the existing error handling system. It correctly uses thesnafucrate's capabilities to capture and display relevant context, enhancing the error reporting within the application.src/meta-srv/src/procedure/region_migration.rs (4)
22-22: Add documentation for thetest_utilmodule.The
test_utilmodule is now publicly exposed, but lacks documentation. Consider adding a brief description of its purpose and usage to help other developers understand its role in testing region migration procedures.
[REFACTOR_SUGGESTion]+/// Utilities for testing region migration procedures. pub mod test_util;
368-371: Handle optional guard in constructors and serialization.The handling of an optional
RegionMigrationProcedureGuardin the constructors and during the deserialization process is crucial for ensuring that the migration procedures are correctly managed and tracked. It's important to ensure that this optional guard does not lead to scenarios where the absence of a guard could cause unexpected behavior or resource leaks.Consider adding checks or default behaviors when the guard is
Noneto prevent any unintended side effects.Also applies to: 390-395, 421-421
46-46: Explicitly importRegionMigrationProcedureGuardandRegionMigrationProcedureTracker.Using explicit imports instead of wildcard imports can improve code readability and maintainability by making dependencies clear.
- use manager::{RegionMigrationProcedureGuard, RegionMigrationProcedureTracker}; + use manager::RegionMigrationProcedureGuard; + use manager::RegionMigrationProcedureTracker;Likely invalid or redundant comment.
553-553: Verify correct handling of deserialization and re-serialization.When deserializing and re-serializing the
RegionMigrationProcedure, ensure that the state and context are correctly maintained. This is crucial for the idempotency and correctness of the migration process, especially in distributed environments where failures and retries are common.Also applies to: 574-574
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Files selected for processing (4)
- src/common/meta/src/key.rs (1 hunks)
- src/meta-srv/src/handler/failure_handler.rs (3 hunks)
- src/meta-srv/src/procedure/region_migration/manager.rs (7 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
Files skipped from review as they are similar to previous changes (2)
- src/common/meta/src/key.rs
- src/meta-srv/src/procedure/region_migration/manager.rs
Additional comments not posted (1)
src/meta-srv/src/handler/failure_handler.rs (1)
54-55: Method name clarity foraccept.The
acceptmethod could be renamed tohandle_heartbeatto better describe its functionality, enhancing code readability and maintainability.- .accept(DatanodeHeartbeat::from(stat)) + .handle_heartbeat(DatanodeHeartbeat::from(stat))Likely invalid or redundant comment.
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Files selected for processing (5)
- src/common/meta/src/test_util.rs (2 hunks)
- src/meta-srv/src/error.rs (4 hunks)
- src/meta-srv/src/metasrv.rs (6 hunks)
- src/meta-srv/src/metasrv/builder.rs (7 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
Files skipped from review as they are similar to previous changes (3)
- src/meta-srv/src/error.rs
- src/meta-srv/src/metasrv.rs
- src/meta-srv/src/metasrv/builder.rs
Additional comments not posted (4)
src/meta-srv/src/region/supervisor.rs (4)
41-48: Documentation needed forDatanodeHeartbeatstruct.The
DatanodeHeartbeatstruct is central to the heartbeat handling logic but lacks documentation. Adding Rustdoc comments would aid in understanding its role and significance.
61-67: Consider removing theDumpvariant from production code.The
Eventenum includes aDumpvariant used for testing, which is guarded by acfg(test)attribute. Ensure that this does not expose any sensitive information or unnecessarily bloat the production binary. If it's solely for testing, consider ways to isolate it more effectively from the production code.
98-120: Optimize locking strategy inRegionSupervisorTicker::start.The use of
Mutex::lock().unwrap()could lead to potential deadlocks or panics in case of lock poisoning. Consider using a non-blocking approach or handle the potential error more gracefully.
228-245: Enhance error handling inrunmethod.The
runmethod processes various events but lacks comprehensive error handling, particularly in thehandle_region_failuresfunction. This could lead to unhandled errors that might affect the stability of the system.
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Files selected for processing (1)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
Additional comments not posted (3)
src/meta-srv/src/region/supervisor.rs (3)
41-51: Documentation added forDatanodeHeartbeatstruct.The added documentation for the
DatanodeHeartbeatstruct is clear and informative. It helps in understanding the role of this struct within the context of region supervision.
144-144: Consider aligningDEFAULT_TICK_INTERVALwith the heartbeat interval.The
DEFAULT_TICK_INTERVALis currently set to 1 second. It might be beneficial to align this with the heartbeat interval used elsewhere in the system to maintain consistency and predictability in timing-related operations.- pub const DEFAULT_TICK_INTERVAL: Duration = Duration::from_secs(1); + pub const DEFAULT_TICK_INTERVAL: Duration = Duration::from_secs(HEARTBEAT_INTERVAL_MILLIS);
231-248: Enhance error handling inrunmethod.The
runmethod processes various events but lacks comprehensive error handling, particularly in thehandle_region_failuresfunction. This could lead to unhandled errors that might affect the stability of the system.- self.handle_region_failures(regions).await; + if let Err(e) = self.handle_region_failures(regions).await { + error!(e; "Failed to handle region failures"); + }Likely invalid or redundant comment.
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Files selected for processing (3)
- src/meta-srv/src/error.rs (2 hunks)
- src/meta-srv/src/region/failure_detector.rs (1 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
Files skipped from review as they are similar to previous changes (2)
- src/meta-srv/src/error.rs
- src/meta-srv/src/region/failure_detector.rs
Additional comments not posted (3)
src/meta-srv/src/region/supervisor.rs (3)
41-51: Documentation added forDatanodeHeartbeat.The documentation for
DatanodeHeartbeathas been added, providing a clear description of its purpose and the data it holds. This is a good practice for maintainability and understandability of the code.
64-82: Documentation added forEventenum.The documentation for the
Eventenum has been updated to include descriptions of each variant. This enhances the readability and maintainability of the code by clearly explaining the role of each event type.
243-260: Enhance error handling inrunmethod.The
runmethod processes various events but lacks comprehensive error handling, particularly in thehandle_region_failuresfunction. This could lead to unhandled errors that might affect the stability of the system.- self.handle_region_failures(regions).await; + if let Err(e) = self.handle_region_failures(regions).await { + error!(e; "Failed to handle region failures"); + }Likely invalid or redundant comment.
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Files selected for processing (4)
- src/meta-srv/src/error.rs (2 hunks)
- src/meta-srv/src/metasrv/builder.rs (6 hunks)
- src/meta-srv/src/region/failure_detector.rs (1 hunks)
- src/meta-srv/src/region/supervisor.rs (1 hunks)
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src/meta-srv/src/region/failure_detector.rs (5)
47-52: Constructor forRegionFailureDetectoris well-defined.The constructor method
newinitializes theRegionFailureDetectorwith the provided options and an emptyDashMap. This is straightforward and efficient.
64-69: Methoditerefficiently iterates over detectors.The method
iterprovides a way to iterate over allPhiAccrualFailureDetectorinstances in thedetectorsmap. This is implemented using a map operation to convert each entry into aFailureDetectorEntry, which is an efficient way to handle the iteration.
71-79: Methods for managing detectors are correctly implemented.The methods
removeandclearprovide functionality to manage thePhiAccrualFailureDetectorinstances stored in thedetectorsmap. These methods are straightforward and use the appropriate DashMap methods for their operations.
81-97: Test-only methods are well-guarded and simple.The methods
contains,len, andis_emptyare guarded by thecfg(test)attribute, ensuring they are only included in test builds. This is a good practice as it prevents these methods from being part of the production binary.
99-107: Dump method for testing is correctly implemented.The
dumpmethod clones all entries from thedetectorsmap into a newRegionFailureDetectorinstance. This method is useful for testing purposes to ensure that the state of the detectors can be replicated or inspected.src/meta-srv/src/metasrv/builder.rs (4)
228-228: Check for remote WAL configuration is crucial for subsequent logic.This line checks if the WAL configuration is remote, which is important for deciding whether region failover features can be enabled. It's correctly placed before the logic that depends on this condition.
Line range hint
284-295: DDL manager initialization includes necessary context and error handling.The initialization of
DdlManagerincludes all necessary context and uses thetry_newmethod with proper error handling usingcontext. This is a robust way to handle potential initialization errors.
314-319: Handle unsupported configurations gracefully.The error handling for unsupported configurations (local WAL with region failover enabled) is crucial. The current implementation returns an error if the condition is met, which prevents misconfigurations at runtime.
321-337: Conditional logic for region failover and supervision is well-implemented.The conditional logic to create
RegionFailureHandlerandRegionSupervisorTickerbased on the WAL configuration and failover settings is clear and well-structured. This ensures that resources are only allocated when necessary.src/meta-srv/src/region/supervisor.rs (2)
41-51: Documentation added forDatanodeHeartbeatstruct.The addition of documentation for
DatanodeHeartbeatis a positive change, enhancing the readability and maintainability of the code. It clearly explains the purpose and usage of the struct within the system.
243-260: Enhance error handling inrunmethod.The
runmethod processes various events but lacks comprehensive error handling, particularly in thehandle_region_failuresfunction. This could lead to unhandled errors that might affect the stability of the system.- self.handle_region_failures(regions).await; + if let Err(e) = self.handle_region_failures(regions).await { + error!(e; "Failed to handle region failures"); + }Likely invalid or redundant comment.
src/meta-srv/src/error.rs (1)
42-48: New error typeLookupPeeradded.The addition of the
LookupPeererror type is well-integrated into the existing error handling system. The use of#[snafu(implicit)]for thelocationfield is consistent with other error types in the enum, which helps in capturing the error's context automatically.Ensure that the
sourcefield, which captures the underlying error, is adequately handled wherever this new error type is used. This ensures that the root cause of the error is not lost, which is crucial for debugging and error reporting.
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Refer to a related PR or issue link (optional)
#4161
What's changed and what's your intention?
Migrate region failover implementation to region migration
Checklist
Summary by CodeRabbit
New Features
RegionFailureDetectorandRegionSupervisor.RegionSupervisorTickerfor automated region supervision.Bug Fixes
LookupPeervariant in theErrorenum.Refactor
running_proceduresmanagement toRegionMigrationProcedureTracker.RegionFailureHandlerto utilizeHeartbeatAcceptor.Chores