[Bug] Fix Bug that fe's connection which is timed out can't be released #4774
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…oncurrentMap from hashMap. Thread [Connect-Scheduler-Check-Timer] fail to iterate the connectionMap , because other threads will modify the connectionMap at the same time.
caiconghui
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caiconghui
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…oncurrentMap from hashMap. (apache#4774)
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#4773
Thread [Connect-Scheduler-Check-Timer] will stop due to failing to iterate the connectionMap , because other threads will modify the connectionMap at the same time.
Fe's connection whic is timed out can't be released because of thread [Connect-Scheduler-Check-Timer] not working.
Exception
[fe.out]
INFO: Use Simple share channel pool to create protobuf RPC proxy with interface interface org.apache.doris.rpc.PBackendService
Exception in thread "ConnectScheduler Check Timer" java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
at java.util.HashMap$ValueIterator.next(HashMap.java:1474)
at org.apache.doris.qe.ConnectScheduler$TimeoutChecker.run(ConnectScheduler.java:89)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)