KAFKA-19994: TaskManager may not close all tasks on task timeouts #21155
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When a TimeoutException occurs while trying to put multiple active tasks back into running, we will add the timed out task back to the state updater, so that we retry it. However, if we run into a Task timeout (failing to make progress for a long time), we will rethrow a StreamsException wrapping the TimeoutException we have drained multiple tasks from the state updater, they will be lost, and not added back to the state updater, and therefore not be closed correctly. The task directories remain locked, causing issues trying to replace the stream thread.
mjsax
approved these changes
Dec 15, 2025
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When a TimeoutException occurs while trying to put multiple active tasks
back into running, we will add the timed out task back to the state
updater, so that we retry it.
However, if we run into a Task timeout (failing to make progress for a
long time), we will rethrow a StreamsException wrapping the
TimeoutException we have drained multiple tasks from the state
updater, they will be lost, and not added back to the state updater,
and therefore not be closed correctly. The task directories remain
locked, causing issues trying to replace the stream thread.
Reviewers: Matthias J. Sax [email protected]