[ https://issues.apache.org/jira/browse/HDFS-14367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guo Lei updated HDFS-14367:
---------------------------
    Description: 
The thread number increase to maximumPoolSize only when the workQueue is full.

org/apache/hadoop/hdfs/server/datanode/erasurecode/ErasureCodingWorker.java

private void initializeStripedBlkReconstructionThreadPool(int numThreads) {
  LOG.debug("Using striped block reconstruction; pool threads={}",
      numThreads);
  stripedReconstructionPool = DFSUtilClient.getThreadPoolExecutor(2,
      numThreads, 60, new LinkedBlockingQueue<>(),
      "StripedBlockReconstruction-", false);
  stripedReconstructionPool.allowCoreThreadTimeOut(true);
}

  was:The thread number increase to maximumPoolSize only when the workQueue is full.


> Useless parameter maxPoolSize in striped reconstruct thread pool
> ----------------------------------------------------------------
>
>                 Key: HDFS-14367
>                 URL: https://issues.apache.org/jira/browse/HDFS-14367
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ec
>    Affects Versions: 3.3.0
>            Reporter: Guo Lei
>            Priority: Major
>
> The thread number increase to maximumPoolSize only when the workQueue is full.
> org/apache/hadoop/hdfs/server/datanode/erasurecode/ErasureCodingWorker.java
> private void initializeStripedBlkReconstructionThreadPool(int numThreads) {
>   LOG.debug("Using striped block reconstruction; pool threads={}",
>       numThreads);
>   stripedReconstructionPool = DFSUtilClient.getThreadPoolExecutor(2,
>       numThreads, 60, new LinkedBlockingQueue<>(),
>       "StripedBlockReconstruction-", false);
>   stripedReconstructionPool.allowCoreThreadTimeOut(true);
> }



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