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https://issues.apache.org/jira/browse/KAFKA-7121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Randall Hauch updated KAFKA-7121:
---------------------------------
Affects Version/s: 1.1.0
> Intermittently, Connectors fail to assign tasks and keep retrying every
> second forever.
> ---------------------------------------------------------------------------------------
>
> Key: KAFKA-7121
> URL: https://issues.apache.org/jira/browse/KAFKA-7121
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 1.1.0
> Reporter: Gwen Shapira
> Assignee: Konstantine Karantasis
> Priority: Major
>
> We started a connector, and even though it is in RUNNING status, tasks are
> not getting assigned:
>
> {code:java}
> {"name":"prod-xxx-v2","connector":
> {"state":"RUNNING","worker_id":"0.0.0.0:8083"}
> ,"tasks":[],"type":"sink"}
> {code}
>
> Other connectors are running without issues.
> Attempt to restart the connector returned 409 status.
> Logs show the following messages, keep repeating for hours:
> {code:java}
> [2018-06-29 20:23:19,288] ERROR Task reconfiguration for prod-xxx-v2 failed
> unexpectedly, this connector will not be properly reconfigured unless
> manually triggered.
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder:956)
> [2018-06-29 20:23:19,289] INFO 10.200.149.201 - - [29/Jun/2018:20:23:19
> +0000] "POST /connectors/prod-xxx-v2/tasks?forward=false HTTP/1.1" 409 113 0
> (org.apache.kafka.connect.runtime.rest.RestServer:60)
> [2018-06-29 20:23:19,289] INFO 10.200.149.201 - - [29/Jun/2018:20:23:19
> +0000] "POST /connectors/prod-xxx-v2/tasks?forward=true HTTP/1.1" 409 113 1
> (org.apache.kafka.connect.runtime.rest.RestServer:60)
> [2018-06-29 20:23:19,289] INFO 10.200.149.201 - - [29/Jun/2018:20:23:19
> +0000] "POST /connectors/prod-xxx-v2/tasks HTTP/1.1" 409 113 1
> (org.apache.kafka.connect.runtime.rest.RestServer:60)
> [2018-06-29 20:23:19,289] ERROR Request to leader to reconfigure connector
> tasks failed
> (org.apache.kafka.connect.runtime.distributed.DistributedHerder:1018)
> org.apache.kafka.connect.runtime.rest.errors.ConnectRestException: Cannot
> complete request because of a conflicting operation (e.g. worker rebalance)
> at
> org.apache.kafka.connect.runtime.rest.RestServer.httpRequest(RestServer.java:229)
> at
> org.apache.kafka.connect.runtime.distributed.DistributedHerder$18.run(DistributedHerder.java:1015)
> at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> 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){code}
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