Clarify global checkpoint recovery #21934
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Today when starting a new engine, we read the global checkpoint from the translog only if we are opening an existing translog. This commit clarifies this situation by distinguishing the three cases of engine creation in the constructor leading to clearer code.
bleskes
approved these changes
Dec 2, 2016
| seqNoStats.getMaxSeqNo(), | ||
| seqNoStats.getLocalCheckpoint(), | ||
| seqNoStats.getGlobalCheckpoint()); | ||
| logger.trace( |
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nit: seqNoStats has a toString - just use it and be safe?
| @@ -209,6 +219,18 @@ public InternalEngine(EngineConfig engineConfig) throws EngineException { | |||
| logger.trace("created new InternalEngine"); | |||
| } | |||
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| private static SequenceNumbersService sequenceNumberService( | |||
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this is what you get from the crazy syntax 👅
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retest this please |
In the constructor for the internal engine, we log a trace statement showing the recovered max sequence number, local checkpoint, and global checkpoint. This commit simplifies this logging statement to just use the fact that SeqNoStats implements toString.
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Thanks @bleskes. |
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Today when starting a new engine, we read the global checkpoint from the
translog only if we are opening an existing translog. This commit
clarifies this situation by distinguishing the three cases of engine
creation in the constructor leading to clearer code.
Relates #21254