[jira] [Created] (HBASE-14478) A ThreadPoolExecutor with a LinkedBlockingQueue cannot execute tasks concurrently

["Jingcheng Du (JIRA)" <ji...@apache.org>]

Jingcheng Du created HBASE-14478:
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             Summary: A ThreadPoolExecutor with a LinkedBlockingQueue cannot execute tasks concurrently
                 Key: HBASE-14478
                 URL: https://issues.apache.org/jira/browse/HBASE-14478
             Project: HBase
          Issue Type: Improvement
          Components: regionserver
    Affects Versions: 2.0.0
            Reporter: Jingcheng Du
            Assignee: Jingcheng Du
             Fix For: 2.0.0


In FlushTableSubprocedurePool and SnapshotSubprocedurePool, the ThreadPoolExecutor with a LinkedBlockingQueue is used, and it's corePoolSize and maximumPoolSize are not the same, which can cause the if the number of tasks is larger than corePoolSize, those tasks cannot be executed until old tasks are finished and the number of running tasks is less than corePoolSize. We should use the same value for the corePoolSize and maximumPoolSize if the LinkedBlockingQueue is used.



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