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https://issues.apache.org/jira/browse/FLINK-17560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17104103#comment-17104103
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josson paul kalapparambath edited comment on FLINK-17560 at 5/11/20, 6:00 AM:
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[~xintongsong]
Job Manager is completely restarted as part of some upgrade process.
[https://github.com/apache/flink/blob/d54807ba10d0392a60663f030f9fe0bfa1c66754/flink-runtime/src/main/java/org/apache/flink/runtime/taskexecutor/slot/TaskSlotTable.java#L320]
If taskSlot.markFree() does not return true, at what point the taskSlot is
marked as free?. I am not able to find the code where the slot is assigned as
FREE.
was (Author: josson):
[~xintongsong]
Job Manager is completely restarted either as part of some upgrade process.
[https://github.com/apache/flink/blob/d54807ba10d0392a60663f030f9fe0bfa1c66754/flink-runtime/src/main/java/org/apache/flink/runtime/taskexecutor/slot/TaskSlotTable.java#L320]
If taskSlot.markFree() does not return true, at what point the taskSlot is
marked as free?. I am not able to find the code where the slot is assigned as
FREE.
> No Slots available exception in Apache Flink Job Manager while Scheduling
> -------------------------------------------------------------------------
>
> Key: FLINK-17560
> URL: https://issues.apache.org/jira/browse/FLINK-17560
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.8.3
> Environment: Flink verson 1.8.3
> Session cluster
> Reporter: josson paul kalapparambath
> Priority: Major
>
> Set up
> ------
> Flink verson 1.8.3
> Zookeeper HA cluster
> 1 ResourceManager/Dispatcher (Same Node)
> 1 TaskManager
> 4 pipelines running with various parallelism's
> Issue
> ------
> Occationally when the Job Manager gets restarted we noticed that all the
> pipelines are not getting scheduled. The error that is reporeted by the Job
> Manger is 'not enough slots are available'. This should not be the case
> because task manager was deployed with sufficient slots for the number of
> pipelines/parallelism we have.
> We further noticed that the slot report sent by the taskmanger contains solts
> filled with old CANCELLED job Ids. I am not sure why the task manager still
> holds the details of the old jobs. Thread dump on the task manager confirms
> that old pipelines are not running.
> I am aware of https://issues.apache.org/jira/browse/FLINK-12865. But this is
> not the issue happening in this case.
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