[KAFKA-10323] NullPointerException during rebalance

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.5.0
• Component/s: connect
• Assignee: Unassigned
• Reporter: yazgoo
• Created: 29/Jul/20 14:29
• Updated: 18/Oct/22 23:53

Description

confluent platform version: 5.5.0-ccs

connector used: s3

Connector stops after rebalancing:

ERROR [Worker clientId=connect-1, groupId=connect] Couldn't instantiate task <my task> because it has an invalid task configuration. This task will not execute until reconfigured.

java.lang.NullPointerException
at org.apache.kafka.connect.runtime.Worker.startTask(Worker.java:427)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.startTask(DistributedHerder.java:1147)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.access$1600(DistributedHerder.java:126)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder$12.call(DistributedHerder.java:1162)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder$12.call(DistributedHerder.java:1158)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

Issue Links

• is duplicated by: KAFKA-13486 Kafka Connect: Failed to start task due to NPE