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https://issues.apache.org/jira/browse/KAFKA-19724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18021483#comment-18021483
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Mikołaj Bul edited comment on KAFKA-19724 at 9/19/25 6:38 PM:
--------------------------------------------------------------
You're right, now I see that the first call to {{setUncaughtExceptionHandler}}
on {{globalStreamThread}} is using the new implementation and sets it right. I
might have incorrectly pinpointed my issue.
I've verified that the problem I've encountered happens when {{initialize()}}
call in {{GlobalStreamThread:276}} throws an {{ExceptionInInitializerError}}
due to RocksDB failing to load the library in static initializer of
{{{}DBOptions{}}}. This exception was only caught inside the
{{java.lang.Thread}} exception handler of the {{{}globalStreamThread{}}}.
was (Author: JIRAUSER310996):
You're right, now I see that the first call to {{setUncaughtExceptionHandler}}
on {{globalStreamThread}} is using the new implementation and sets it right. I
might have incorrectly pinpointed my issue.
I've verified that the problem I've encountered happens when {{initialize()}}
call in {{GlobalStreamThread:276}} throws an {{ExceptionInInitializerError}}
due to RocksDB failing to load the library in static initializer of
{{{}DBOptions{}}}. This exception was only caught inside the
{{java.lang.Thread}} exception handler of the {{{}globalStreamThread{}}}.
> Global stream thread ignores all exceptions
> -------------------------------------------
>
> Key: KAFKA-19724
> URL: https://issues.apache.org/jira/browse/KAFKA-19724
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 3.4.0
> Reporter: Mikołaj Bul
> Priority: Major
> Labels: beginner, newbie
>
> {{globalStreamThread}} in {{KafkaStreams}} class ignores all exceptions and
> fails to apply the user-provided {{StreamsUncaughtExceptionHandler}} in:
> {code:java}
> public void setUncaughtExceptionHandler(final StreamsUncaughtExceptionHandler
> userStreamsUncaughtExceptionHandler)
> {code}
> This can lead to streams being stuck in faulty state after an exception is
> thrown during their initialization phase (e.g. failure to load the RocksDB
> native library). The exception isn't logged, so debugging such problem is
> difficult.
> From my understanding of the {{b62d8b97}} commit message, the following code
> is unnecessary as the {{globalStreamThread}} can't be replaced and the issue
> description from KAFKA-12699 doesn't apply to it. Removing it should help.
> {code:java}
> if (globalStreamThread != null) {
> globalStreamThread.setUncaughtExceptionHandler((t, e) -> { }
> );
> }
> {code}
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