ShuMing Li created SPARK-24738:
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Summary: [HistoryServer] FsHistoryProvider clean outdated event
logs at start
Key: SPARK-24738
URL: https://issues.apache.org/jira/browse/SPARK-24738
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.3.1
Reporter: ShuMing Li
Now FsHistoryProvider's policy :
* 1. FsHistoryProvider create checkEvent thread and cleanLog thread, they
share one thread pool to avoid conflicts;
* 2. check thread replay all event logs first;
* 3. clean thread iterators all events to check the outdated events and remove
about it;
Why check thread at step2 not clean the outdated eventLogs at start, so no need
replay the outdated logs to save times ?
```
// Used by check event thread and clean log thread.
// Scheduled thread pool size must be one, otherwise it will have concurrent
issues about fs
// and applications between check task and clean task
```
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