[
https://issues.apache.org/jira/browse/KAFKA-7121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Gwen Shapira updated KAFKA-7121:
--------------------------------
Description:
We started a connector, and even though it is in RUNNING status, tasks are not
getting assigned:
{"name":"prod-xxx-v2","connector":
{"state":"RUNNING","worker_id":"[0.0.0.0:8083|http://0.0.0.0:8083/]"}
,"tasks":[],"type":"sink"}
Other connectors are running without issues.
Attempt to restart the connector returned 409 status.
Logs show the following messages, keep repeating for hours:
{{ [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)}}
was:
We started a connector, and even though it is in RUNNING status, tasks are not
getting assigned:
{"name":"prod-xxx-v2","connector":{"state":"RUNNING","worker_id":"[0.0.0.0:8083|http://0.0.0.0:8083/]"},"tasks":[],"type":"sink"}
Other connectors are running without issues.
Attempt to restart the connector returned 409 status.
Logs show the following messages, keep repeating for hours:
```
[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)
```
> 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
> Reporter: Gwen Shapira
> Priority: Major
>
> We started a connector, and even though it is in RUNNING status, tasks are
> not getting assigned:
> {"name":"prod-xxx-v2","connector":
> {"state":"RUNNING","worker_id":"[0.0.0.0:8083|http://0.0.0.0:8083/]"}
> ,"tasks":[],"type":"sink"}
> Other connectors are running without issues.
> Attempt to restart the connector returned 409 status.
> Logs show the following messages, keep repeating for hours:
> {{ [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)}}
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