zheguang commented on PR #20564:
URL: https://github.com/apache/kafka/pull/20564#issuecomment-3316445907

   Thanks for catching the bug, @fanyang.  Probably easy to nail the scenario 
in a a small test case to `WorkerTest`, similar to 
`testConnectorStatusMetricsGroup_taskStatusCounter` 
[here](https://github.com/apache/kafka/blob/01fccd35138b407d87828ceb557d33c4b5450cac/connect/runtime/src/test/java/org/apache/kafka/connect/runtime/WorkerTest.java#L872),
 such as
   ```java
   assertDoesNotThrow(() -> metricsGroup.recordTaskRemoved(new 
ConnectorTaskId('nonadded-task')), "should not throw NPE").
   ```


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