skonto edited a comment on issue #24796: [SPARK-27900][CORE] Add uncaught exception handler to the driver URL: https://github.com/apache/spark/pull/24796#issuecomment-501593451 @zsxwing we can only fix the related issue here, just avoid the deadlock so shutdown is finished. As for the generic case I dont see why this thread is not interrupted maybe because this is a special case when handling an Uncaught Exception via a handler coming from the thread it caused it. I will check what jvm does in this case but if there is anyone who knows more feel free to call him here. Probably hitting this one: https://bugs.openjdk.java.net/browse/JDK-8154017 mentioned here:https://github.com/jacoco/jacoco/issues/394#issuecomment-208531845. The fix in there ignores all interrupts until the hooks are completed so since the uncaught exception handler executes a shutdownhook from the event loop thread it cannot be interrupted.
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