This is an automated email from the ASF dual-hosted git repository. mmerli pushed a commit to branch fix-illegal-thread-state-shutdown in repository https://gitbox.apache.org/repos/asf/bookkeeper.git
commit 9ff11f1d35dd74c910887c1a176d015672b45629 Author: Matteo Merli <[email protected]> AuthorDate: Tue Mar 24 13:53:37 2026 -0700 [FIX] Fix IllegalThreadStateException in ComponentStarter shutdown hook 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. --- .../org/apache/bookkeeper/common/component/ComponentStarter.java | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/bookkeeper-common/src/main/java/org/apache/bookkeeper/common/component/ComponentStarter.java b/bookkeeper-common/src/main/java/org/apache/bookkeeper/common/component/ComponentStarter.java index d1cb08163c..b8dfced36d 100644 --- a/bookkeeper-common/src/main/java/org/apache/bookkeeper/common/component/ComponentStarter.java +++ b/bookkeeper-common/src/main/java/org/apache/bookkeeper/common/component/ComponentStarter.java @@ -76,7 +76,12 @@ public class ComponentStarter { component.getName(), t, e); System.err.println(e.getMessage()); // start the shutdown hook when an uncaught exception happen in the lifecycle component. - shutdownHookThread.start(); + try { + shutdownHookThread.start(); + } catch (IllegalThreadStateException ise) { + // the shutdown hook thread is already running (e.g. triggered by a prior + // exception or by the JVM shutdown sequence), so there is nothing else to do. + } }); component.publishInfo(new ComponentInfoPublisher());
