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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-9413) Tasks can fail with PartitionNotFoundException if consumer deployment takes too long
Date Fri, 13 Jul 2018 09:03:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-9413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16542744#comment-16542744
] 

ASF GitHub Bot commented on FLINK-9413:
---------------------------------------

Github user tillrohrmann commented on the issue:

    https://github.com/apache/flink/pull/6103
  
    With [FLINK-5129](https://issues.apache.org/jira/browse/FLINK-5129) which is part of Flink
1.3.0, we allow the `BlobCache` to retrieve the blobs from the HA storage location. In your
case this seems to be HDFS. The idea was that this should alleviate the I/O pressure from
the `JobManager` because not all blobs are served by a single node. Thus, this should rather
improve the situation with this issue.


> Tasks can fail with PartitionNotFoundException if consumer deployment takes too long
> ------------------------------------------------------------------------------------
>
>                 Key: FLINK-9413
>                 URL: https://issues.apache.org/jira/browse/FLINK-9413
>             Project: Flink
>          Issue Type: Bug
>          Components: Distributed Coordination
>    Affects Versions: 1.4.0, 1.5.0, 1.6.0
>            Reporter: Till Rohrmann
>            Assignee: zhangminglei
>            Priority: Critical
>              Labels: pull-request-available
>
> {{Tasks}} can fail with a {{PartitionNotFoundException}} if the deployment of the producer
takes too long. More specifically, if it takes longer than the {{taskmanager.network.request-backoff.max}},
then the {{Task}} will give up and fail.
> The problem is that we calculate the {{InputGateDeploymentDescriptor}} for a consuming
task once the producer has been assigned a slot but we do not wait until it is actually running.
The problem should be fixed if we wait until the task is in state {{RUNNING}} before assigning
the result partition to the consumer.



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