task cannot be shutdown

[ieasydevops]

hi , I found a problem as follows,it seems to be a serious bug there, how can i fix this?

after i restart all the component of druid, without delete mysql index, ( and i delete all the files in the var directory) , then a task do the job like that:

1. TaskQueue - Asking taskRunner to run
2. RemoteTaskRunner - Added pending task
3. Coordinator asking Worker to add task
4. [rtr-pending-tasks-runner-0]io.druid.indexing.overlord.RemoteTaskRunner -
   Task index_kafka_ucar-pallas-secure_4854008e83380cc_emcfgnhn switched from pending to running
5. io.druid.indexing.overlord.TaskRunnerUtils - Task status changed to [RUNNING]
6. RemoteTaskRunner - Worker wrote RUNNING status for task on
   [TaskLocation{host='null', port=-1}]
7. TaskRunnerUtils - Task location changed to [TaskLocation{host='IP', port=port}]
8. RemoteTaskRunner - No worker selections strategy set. Using default
9. LocalTaskActionClient - Performing action for task ....
10. Sent shutdown message to worker: IP:PORT, status 200 OK, response: {"task":"index_kafka_ucar-pallas-secure_4854008e83380cc_emcfgnhn"}

the problem is that ,this task do the 10 step forever, and cannot shutdown success; and middleManager node create too many file descriptor

 overlord send  shutdown message 

   2017-03-31T16:29:24,476 INFO [TaskQueue-Manager] io.druid.indexing.overlord.RemoteTaskRunner - Sent shutdown message to worker: 10.204.56.39:8091, status 200 OK, response: {"task":"index_kafka_ucar-pallas-secure_d25f91e8c1ca55f_hjhoakhe"}
       2017-03-31T16:30:24,477 INFO [TaskQueue-Manager] io.druid.indexing.overlord.RemoteTaskRunner - Sent shutdown message to worker: 10.204.56.39:8091, status 200 OK, response: {"task":"index_kafka_ucar-pallas-secure_d25f91e8c1ca55f_hjhoakhe"}

middlemanager Ignoring

   2017-03-31T16:29:24,476 INFO [qtp27971761-47] io.druid.indexing.overlord.ForkingTaskRunner -   Ignoring request to cancel unknown task: index_kafka_ucar-pallas-secure_d25f91e8c1ca55f_hjhoakhe

    2017-03-31T16:30:24,477 INFO [qtp27971761-47] io.druid.indexing.overlord.ForkingTaskRunner - 
   Ignoring request to cancel unknown task: index_kafka_ucar-pallas     secure_d25f91e8c1ca55f_hjhoakhe

[PanYifeng]

@meixinyun hi, I faced the same problem. Could you tell me how did you resolve it?

[BenXiangYangGuang]

I met the same problem. If we restart the middleManager, the unknown task will disappear. But after running a while, the unknown task comes back.

[stale]

This issue has been marked as stale due to 280 days of inactivity. It will be closed in 4 weeks if no further activity occurs. If this issue is still relevant, please simply write any comment. Even if closed, you can still revive the issue at any time or discuss it on the dev@druid.apache.org list. Thank you for your contributions.

[stale]

This issue has been closed due to lack of activity. If you think that is incorrect, or the issue requires additional review, you can revive the issue at any time.