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  1. IMPALA
  2. IMPALA-8975

Impala use Hive UDF with Mysql , there are to many Abandoned connection cleanup thread in Impalad

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: Impala 2.11.0
    • Fix Version/s: None
    • Component/s: Backend
    • Labels:
      None
    • Flags:
      Important
    • Epic Color:
      ghx-label-6

      Description

      [arthas@93773]$ thread | grep Abandoned connection cleanup | wc -l 

      there is 2K+ threads (Abandoned connection cleanup thread)  which thread state is timed_wating  in impalad

      for example:

      [arthas@93773]$ thread 262
      "Abandoned connection cleanup thread" Id=262 TIMED_WAITING on java.lang.ref.ReferenceQueue$Lock@17b40f38
      at java.lang.Object.wait(Native Method)

      • waiting on java.lang.ref.ReferenceQueue$Lock@17b40f38
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
        at com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:64)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)

      Number of locked synchronizers = 1

      • java.util.concurrent.ThreadPoolExecutor$Worker@2edcbdc4

      Affect(row-cnt:0) cost in 87 ms.

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            • Assignee:
              Unassigned
              Reporter:
              hqbhoho hqbhoho
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              Dates

              • Created:
                Updated: