[KAFKA-9258] Connect ConnectorStatusMetricsGroup sometimes NPE

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.4.0, 2.5.0
• Fix Version/s: 2.4.0, 2.5.0
• Component/s: connect
• Assignee: Cyrus Vafadari
• Reporter: Cyrus Vafadari
• Reviewer: Randall Hauch
• Created: 02/Dec/19 21:22
• Updated: 04/Dec/19 03:58
• Resolved: 04/Dec/19 03:58

Description

java.lang.NullPointerException
at org.apache.kafka.connect.runtime.Worker$ConnectorStatusMetricsGroup.recordTaskRemoved(Worker.java:901)
at org.apache.kafka.connect.runtime.Worker.awaitStopTask(Worker.java:720)
at org.apache.kafka.connect.runtime.Worker.awaitStopTasks(Worker.java:740)
at org.apache.kafka.connect.runtime.Worker.stopAndAwaitTasks(Worker.java:758)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.processTaskConfigUpdatesWithIncrementalCooperative(DistributedHerder.java:575)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.tick(DistributedHerder.java:396)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.run(DistributedHerder.java:282)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
at java.util.concurrent.FutureTask.run(FutureTask.java)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

Issue Links

• links to: GitHub Pull Request #7768