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  1. JDK
  2. JDK-8221892

ThreadPoolExecutor: Thread.isAlive() is not equivalent to not being startable

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        As referenced by Thomas Stuefe in:

        http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2019-April/033512.html

        ThreadPoolExecutor.addWorker has:

         if (t.isAlive()) // precheck that t is startable
                 throw new IllegalThreadStateException();

        but that is not a sufficient check for being "startable" as a thread that has already terminated is "not alive". If such a thread is then "started" the code will throw IllegalThreadStateException without doing proper cleanup of the worker list.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8228586 ThreadPoolExecutor: Thread.isAlive() is not equivalent to not being startable

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8235316 ThreadPoolExecutor: Thread.isAlive() is not equivalent to not being startable

            • P3 - Major loss of function.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8221893 ApplicationShutdownHook: Thread.isAlive() is not equivalent to not being startable

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Open

            Bug - A problem which impairs or prevents the functions of the product. JDK-8221657 java.lang.Thread::setDaemon modifies the state of terminated threads

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Open

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                martin Martin Buchholz
                dholmes David Holmes
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