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Posted to issues@flink.apache.org by "yanpengshi (Jira)" <ji...@apache.org> on 2022/04/14 01:34:00 UTC

[jira] [Created] (FLINK-27236) No task slot allocated for job in larege-scale job

yanpengshi created FLINK-27236:
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             Summary: No task slot allocated for job in larege-scale job
                 Key: FLINK-27236
                 URL: https://issues.apache.org/jira/browse/FLINK-27236
             Project: Flink
          Issue Type: Bug
    Affects Versions: 1.13.3
            Reporter: yanpengshi
         Attachments: jobmanager.log.26, taskmanager.log, topology.png

Hey，

 
We run a large-scale flink job containing six vertices with 3k parallelism. The Topology is shown below.

!topology.png!

We meets the following exception in jobmanager.log:[^jobmanager.log.26]
{code:java}
2022-03-02 08:01:16,601 INFO  [1998] [org.apache.flink.runtime.executiongraph.Execution.transitionState(Execution.java:1446)]  - Source: tdbank_exposure_wx -&gt; Flat Map (772/3000) (6cd18d4ead1887a4e19fd3f337a6f4f8) switched from DEPLOYING to FAILED on container_e03_1639558254334_10048_01_004716 @ 11.104.77.40 (dataPort=39313).java.util.concurrent.CompletionException: org.apache.flink.runtime.taskexecutor.exceptions.TaskSubmissionException: No task slot allocated for job ID 000000000000ed780000000000000087 and allocation ID beb058d837c09e8d5a4a6aaf2426ca99. {code}
 

In the taskmanager.log [^taskmanager.log], the slot is freed due to timeout and the taskmanager receives the new allocated request. By increasing the value of key: taskmanager.slot.timeout， we can avoid this exception temporarily.

Here are some our guesses：
 # When the job is scheduled, the slot and execution have been bound, and then the task is deployed to the corresponding taskmanager.

 # The slot is released after the idle interval times out and notify the ResouceManager the slot free. Thus, the resourceManager will assign other request to the slot.

 # The task is deployed to taskmanager according the previous correspondence

 

The key problems are :
 # When the slot is free, the execution is not unassigned from the slot;

 # The slot state is not consistent in JobMaster and ResourceManager

 

Has anyone else encountered this problem? When the slot is freed, how can we unassign the previous bounded execution? Or we need to update the resource address of the execution. @[~zhuzh] @[~wanglijie95] 



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