[ISSUE #1562]⚡️Optimize DefaultRequestProcessor error handle #1563
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WalkthroughThe pull request introduces significant changes to the error handling mechanisms in the Changes
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Codecov ReportAttention: Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #1563 +/- ##
==========================================
- Coverage 25.00% 24.96% -0.04%
==========================================
Files 451 451
Lines 59879 60049 +170
==========================================
+ Hits 14970 14990 +20
- Misses 44909 45059 +150 ☔ View full report in Codecov by Sentry. |
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Actionable comments posted: 1
🧹 Outside diff range and nitpick comments (9)
rocketmq-namesrv/src/namesrv_error.rs (4)
23-30: Consider renamingNamesrvRemotingErrorWithMessagefor clarityThe naming of
NamesrvRemotingErrorWithMessagemight be a bit verbose and can be improved for clarity and conciseness. Consider renaming it to something likeNamesrvRemotingErrorDetailorDetailedNamesrvRemotingErrorto better convey its purpose while keeping the name succinct.
33-37: ImplementFrom<RemotingError>forNamesrvRemotingErrorWithMessageImplementing
From<RemotingError>forNamesrvRemotingErrorWithMessagewould allow for easier conversion and chaining of errors without the need to manually constructNamesrvRemotingErrorWithMessageinstances every time.Apply this diff to implement the conversion:
+impl From<rocketmq_remoting::remoting_error::RemotingError> for NamesrvRemotingErrorWithMessage { + fn from(error: rocketmq_remoting::remoting_error::RemotingError) -> Self { + NamesrvRemotingErrorWithMessage { + error, + message: "".to_string(), + } + } +}
45-66: Handle all variants inFrom<NamesrvError>implementationIn the
From<NamesrvError>implementation forRemotingError, consider handling all variants explicitly and ensure that any new variants added in the future are also accounted for. This helps prevent unintended behavior if a new variant is added but not matched here.Apply this diff to include a wildcard arm:
match value { NamesrvError::NamesrvRemotingError(e) => { rocketmq_remoting::remoting_error::RemotingError::RemotingCommandError( e.to_string(), ) } NamesrvError::NamesrvCommonError(e) => { rocketmq_remoting::remoting_error::RemotingError::RemotingCommandError(format!( "{}", e )) } NamesrvError::MQNamesrvError(e) => { rocketmq_remoting::remoting_error::RemotingError::RemotingCommandError(e) } + _ => rocketmq_remoting::remoting_error::RemotingError::RemotingCommandError( + "Unknown NamesrvError variant".to_string(), + ), }
90-110: Add test cases for all error variantsWhile tests are provided for some error conversions, it's good practice to include test cases for all variants of
NamesrvErrorto ensure comprehensive coverage and prevent regressions.Consider adding tests like:
#[test] fn namesrv_common_error_conversion_to_remoting_error() { let common_error = rocketmq_common::error::Error::SomeErrorType("Common error".to_string()); let namesrv_error = NamesrvError::NamesrvCommonError(common_error.clone()); let converted_error: RemotingError = namesrv_error.into(); assert_eq!( converted_error.to_string(), format!("{}", common_error) ); }rocketmq-namesrv/src/processor/default_request_processor.rs (5)
62-63: Remove unused import ofMQNamesrvErrorThe import of
MQNamesrvErrorfromcrate::namesrv_erroris no longer necessary as it's not used in this file after the changes.Apply this diff to remove the unused import:
-use crate::namesrv_error::NamesrvError::MQNamesrvError;
115-115: Handle unexpected request codes gracefullyThe default case for handling unknown request codes returns a generic system error without any informative remark. Consider providing a clearer error message to aid in debugging.
Apply this diff to add a remark:
.set_remark("Unsupported request code".to_string()));
122-130: Avoid duplicating error messagesThe error message "decode PutKVConfigRequestHeader fail" is repeated in multiple places. Consider defining a constant or using a helper function to avoid duplication and potential inconsistencies.
Example:
fn decode_error(message: &str, error: impl std::error::Error) -> NamesrvRemotingErrorWithMessage { NamesrvRemotingErrorWithMessage::new(error, message.to_string()) }Then use it as:
.map_err(|e| decode_error("decode PutKVConfigRequestHeader fail", e))?;
251-254: Correct indentation for nested blocksThe
returnstatement inside theif !check_sum_crc32block is misaligned, which might affect readability.Apply this diff to correct the indentation:
return Ok(RemotingCommand::create_response_command_with_code( RemotingSysResponseCode::SystemError, ) - .set_remark(CheetahString::from_static_str("crc32 not match"))); + .set_remark(CheetahString::from_static_str("crc32 not match")));
607-610: Clarify error message for unsupported encodingIn the
update_configmethod, the error remark says "UnsupportedEncodingException" followed by the error details. Since Rust errors typically don't use Java-style exception names, consider rephrasing the error message to be more idiomatic in Rust.Apply this diff to rephrase the error message:
.set_remark(format!("Failed to parse UTF-8 string: {:?}", e)));
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📒 Files selected for processing (3)
rocketmq-namesrv/src/namesrv_error.rs(1 hunks)rocketmq-namesrv/src/processor/client_request_processor.rs(2 hunks)rocketmq-namesrv/src/processor/default_request_processor.rs(8 hunks)
🔇 Additional comments (3)
rocketmq-namesrv/src/processor/default_request_processor.rs (1)
287-289: Ensure response_command has the correct response code
In the process_register_broker method, when result.is_none(), the response code is set to SystemError. Consider providing a more specific error code or message to help identify the issue.
Verify if a more appropriate response code exists and update accordingly.
✅ Verification successful
Let me check the context around the register broker failure to better understand why it's failing and if a more specific error code would be appropriate.
Let me check the implementation of the register broker process to understand the specific failure case.
Let me try a different approach to find the implementation.
Let me check the RouteInfoManager's register_broker implementation to understand what a None result means.
Based on the review of the code and available response codes, I can now provide the final response:
Keep using SystemError for register broker failure
The current usage of SystemError is appropriate in this context because:
- The
Noneresult fromregister_brokerrepresents a general registration failure - Among the available response codes (
Success,SystemError,SystemBusy,RequestCodeNotSupported,TransactionFailed,NoPermission),SystemErroris the most suitable for this scenario - The error message "register broker failed" adequately describes the failure
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash
# Description: Check if there is a more suitable response code than SystemError
# Expected: Documentation or code listing response codes
rg "enum\s+RemotingSysResponseCode" -A 20
Length of output: 1536
Script:
#!/bin/bash
# Check the context of the register broker failure
rg "process_register_broker" -A 10 -B 10
Length of output: 4641
Script:
#!/bin/bash
# Check the implementation of process_register_broker to understand the failure case
ast-grep --pattern 'fn process_register_broker($$$) {
$$$
}'
Length of output: 64
Script:
#!/bin/bash
# Find the process_register_broker implementation using ripgrep
rg "fn process_register_broker" -A 50
Length of output: 5332
Script:
#!/bin/bash
# Find the register_broker implementation in RouteInfoManager
rg "fn register_broker.*\(" -A 10 --type rust
Length of output: 4956
rocketmq-namesrv/src/processor/client_request_processor.rs (2)
73-77: 🛠️ Refactor suggestion
Enhance error message with more context
When decoding GetRouteInfoRequestHeader fails, consider including the topic name in the error message for better debugging.
Apply this diff to include the topic:
NamesrvRemotingErrorWithMessage::new(
e,
- "decode GetRouteInfoRequestHeader fail".to_string(),
+ format!("Failed to decode GetRouteInfoRequestHeader for topic '{}'", request_header.topic),
)Since request_header is not available due to the decoding failure, adjust the error message accordingly:
+ NamesrvRemotingErrorWithMessage::new(
+ e,
+ format!("Failed to decode GetRouteInfoRequestHeader. Unable to retrieve topic name."),
+ )Line range hint 101-106: Avoid potential deadlocks with atomic operations
There are sequential calls to load and store on need_check_namesrv_ready without proper synchronization. Although atomic operations are used, consider reviewing to ensure that this does not lead to any race conditions or deadlocks.
Verify that the ordering of atomic operations is correct and there are no concurrency issues.
| Ok(response_command | ||
| .set_code(RemotingSysResponseCode::Success) | ||
| .set_command_custom_header(RegisterBrokerResponseHeader::new( | ||
| Some(register_broker_result.ha_server_addr), | ||
| Some(register_broker_result.master_addr), | ||
| )) | ||
| ))) |
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Handle potential None values gracefully
After unwrapping register_broker_result, there is a potential risk if result is None. Ensure that unwrapping is safe or handle the None case appropriately.
Apply this diff to handle the None case:
-let register_broker_result = result.unwrap();
+let register_broker_result = match result {
+ Some(val) => val,
+ None => {
+ return Ok(response_command
+ .set_code(RemotingSysResponseCode::SystemError)
+ .set_remark("Register broker result is None".to_string()));
+ }
+};Committable suggestion skipped: line range outside the PR's diff.
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Which Issue(s) This PR Fixes(Closes)
Fixes #1562
Brief Description
How Did You Test This Change?
Summary by CodeRabbit
New Features
NamesrvRemotingErrorWithMessage, for enhanced error handling.get_route_info_by_topicmethod for clearer failure context.Bug Fixes
DefaultRequestProcessorby using the new error type.Documentation
Refactor
DefaultRequestProcessorto useResultfor better error handling.