Alexander Kasyanenko created FLINK-14074:
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Summary: MesosResourceManager can't create new taskmanagers in
Session Cluster Mode.
Key: FLINK-14074
URL: https://issues.apache.org/jira/browse/FLINK-14074
Project: Flink
Issue Type: Bug
Components: Deployment / Mesos
Affects Versions: 1.9.0
Environment: Flink HA Session cluster 1.9.0 on mesos.
Reporter: Alexander Kasyanenko
Hi, I'm trying to launch multiple jobs in Flink Session Cluster, deployed on
mesos.
Flink's version is 1.9.0.
The very first resource allocation completes successfully, and first submitted
job launches, but submitting any amount of jobs afterwords doesn't affect the
cluster in any way and no additional TaskManagers are allocated.
>From the logs I see that MesosResourceManager is requesting Slots for the
>newly submitted jobs: "{{o.a.f.m.r.c.MesosResourceManager - Request slot with
>profile ResourceProfile..." }}but {{"Starting a new worker."}} logline appears
>only the same amount of times as taskmanagers count, allocated for the first
>job.
I'm a complete noob in flink internals, but took a wild guess about a reason. I
think that the problem is in this check:
[https://github.com/apache/flink/blob/release-1.9.0/flink-mesos/src/main/java/org/apache/flink/mesos/runtime/clusterframework/MesosResourceManager.java#L436]
It might be that RM is lazily allocated at the first call by a factory, and
then a private final field {{slotsPerWorker}} is set. So this collection field
fill prevent any new worker creation after original amount was created.
I'll try to build a flink without this check and see if it helps. Also I'll
play around with tests for this RM. Since it's my time running time flink
intermals, I'll be back after a few days (it would take some time + country I'm
in will have a national holiday).
Any help will much appreciated.
Thanks in advance.
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