Matthias J. Sax created KAFKA-19171: ---------------------------------------
Summary: 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 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. -- This message was sent by Atlassian Jira (v8.20.10#820010)