dzcxzl created SPARK-34125:
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Summary: Make EventLoggingListener.codecMap thread-safe
Key: SPARK-34125
URL: https://issues.apache.org/jira/browse/SPARK-34125
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.4.7
Reporter: dzcxzl
Attachments: jstack.png, top.png
2.x version of history server
EventLoggingListener.codecMap is of type mutable.HashMap, which is not thread
safe
This will cause the history server to suddenly get stuck and not work.
The 3.x version was changed to EventLogFileReader.codecMap to ConcurrentHashMap
type, so there is no such problem.
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