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https://issues.apache.org/jira/browse/KAFKA-19171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias J. Sax reassigned KAFKA-19171:
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Assignee: Matthias J. Sax
> Kafka Streams crashes with UnsupportedOperationException
> --------------------------------------------------------
>
> Key: KAFKA-19171
> URL: https://issues.apache.org/jira/browse/KAFKA-19171
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 4.0.0
> Reporter: Matthias J. Sax
> Assignee: Matthias J. Sax
> Priority: Blocker
> Fix For: 4.1.0, 4.0.1
>
>
> We observed the following stack trace in our soak cluster
> {code:java}
> Caused by: java.lang.UnsupportedOperationException
> at java.base/java.util.AbstractCollection.add(AbstractCollection.java:251)
> at
> org.apache.kafka.streams.processor.internals.TaskManager.closeTaskClean(TaskManager.java:959)
> at
> org.apache.kafka.streams.processor.internals.TaskManager.handleTasksPendingInitialization(TaskManager.java:517)
> {code}
> Looks like an regression bug: we are passing in an immutable Set.
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