Github user WangTaoTheTonic commented on the issue:
https://github.com/apache/flink/pull/3709
@wenlong88 LoadingCache can also cache and evict data as WeakHashMap, as
this implementation shows it will evict data every 30 seconds and fetch data if
it doesn't contain the required key.
@zentol You're right. The data structures used doesn't matter, while what
is showed in web frontend and how they are updated does. I don't think user
can tasks' stauts update only triggered by JobManager GC(which could be a very
long time).
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