Tao Wang created FLINK-6295:
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Summary: use LoadingCache instead of WeakHashMap to lower latency
Key: FLINK-6295
URL: https://issues.apache.org/jira/browse/FLINK-6295
Project: Flink
Issue Type: Bug
Components: Webfrontend
Reporter: Tao Wang
Now in ExecutionGraphHolder, which is used in many handlers, we use a
WeakHashMap to cache ExecutionGraph(s), which is only sensitive to garbage
collection.
The latency is too high when JVM do GC rarely, which will make status of jobs
or its tasks unmatched with the real ones.
LoadingCache is a common used cache implementation from guava lib, we can use
its time based eviction to lower latency of status update.
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