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Posted to yarn-dev@hadoop.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2014/12/01 21:59:12 UTC

[jira] [Created] (YARN-2914) Potential race condition in ClientSCMMetrics#getInstance()

Ted Yu created YARN-2914:
----------------------------

             Summary: Potential race condition in ClientSCMMetrics#getInstance()
                 Key: YARN-2914
                 URL: https://issues.apache.org/jira/browse/YARN-2914
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Ted Yu
            Priority: Minor


{code}
  public static ClientSCMMetrics getInstance() {
    ClientSCMMetrics topMetrics = Singleton.INSTANCE.impl;
    if (topMetrics == null) {
      throw new IllegalStateException(
{code}
getInstance() doesn't hold lock on Singleton.this
This may result in IllegalStateException being thrown prematurely.



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