[FIX] Fix IllegalThreadStateException in ComponentStarter shutdown hook#4733
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The UncaughtExceptionHandler in ComponentStarter calls shutdownHookThread.start(), but this can throw IllegalThreadStateException if the thread was already started by a prior exception or by the JVM shutdown sequence. This exception propagates out of the handler, causing the JVM to print "Exception thrown from the UncaughtExceptionHandler" on the BookieDeathWatcher thread. Catch IllegalThreadStateException since it simply means shutdown is already in progress.
hangc0276
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Mar 24, 2026
merlimat
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Mar 27, 2026
…ok (#4733) The UncaughtExceptionHandler in ComponentStarter calls shutdownHookThread.start(), but this can throw IllegalThreadStateException if the thread was already started by a prior exception or by the JVM shutdown sequence. This exception propagates out of the handler, causing the JVM to print "Exception thrown from the UncaughtExceptionHandler" on the BookieDeathWatcher thread. Catch IllegalThreadStateException since it simply means shutdown is already in progress.
manas-ctds
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Apr 24, 2026
…ok (apache#4733) The UncaughtExceptionHandler in ComponentStarter calls shutdownHookThread.start(), but this can throw IllegalThreadStateException if the thread was already started by a prior exception or by the JVM shutdown sequence. This exception propagates out of the handler, causing the JVM to print "Exception thrown from the UncaughtExceptionHandler" on the BookieDeathWatcher thread. Catch IllegalThreadStateException since it simply means shutdown is already in progress. (cherry picked from commit 06726e1)
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Summary
UncaughtExceptionHandlerinComponentStartercallsshutdownHookThread.start(), which throwsIllegalThreadStateExceptionif the thread was already started (by a prior exception or the JVM shutdown sequence)Exception: java.lang.IllegalThreadStateException thrown from the UncaughtExceptionHandler in thread "BookieDeathWatcher-<port>"IllegalThreadStateExceptionsince it simply means shutdown is already in progressTest plan