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  1. JDK
  2. JDK-6402537

LockSupport.park with large timeout overflows, causing immediate return, resulting in busy-poll loop

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    • Subcomponent:
    • Resolved In Build:
      b82
    • CPU:
      generic
    • OS:
      solaris

      Description

      If a very long timeout is passed to a blocking method (such as java.util.concurrent.LinkedBlockingQueue.poll) that ultimately uses LockSupport.park, the park call returns immediately instead of suspending the thread. Because park is allowed to return spuriously, the calling code always loops checking the condition it was waiting for and recalling park. This results in a busy-wait loop as the method constantly recalls park, which keeps returning immediately.

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              • Assignee:
                dholmes David Holmes
                Reporter:
                dholmes David Holmes
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