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From "Michael Gummelt (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-16379) Spark on mesos is broken due to race condition in Logging
Date Tue, 05 Jul 2016 21:10:12 GMT

    [ https://issues.apache.org/jira/browse/SPARK-16379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15363256#comment-15363256
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Michael Gummelt commented on SPARK-16379:
-----------------------------------------

> The previous code also involved acquiring a lock

Link?  I don't see this.  Or do you just mean the null check? https://github.com/apache/spark/commit/044971eca0ff3c2ce62afa665dbd3072d52cbbec#diff-bfd5810d8aa78ad90150e806d830bb78L45



> Spark on mesos is broken due to race condition in Logging
> ---------------------------------------------------------
>
>                 Key: SPARK-16379
>                 URL: https://issues.apache.org/jira/browse/SPARK-16379
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 2.0.0
>            Reporter: Stavros Kontopoulos
>            Priority: Blocker
>         Attachments: out.txt
>
>
> This commit introduced a transient lazy log val: https://github.com/apache/spark/commit/044971eca0ff3c2ce62afa665dbd3072d52cbbec
> This has caused problems in the past:
> https://github.com/apache/spark/pull/1004
> One commit before that everything works fine.
> I spotted that when my CI started to fail:
> https://ci.typesafe.com/job/mit-docker-test-ref/191/
> You can easily verify it by installing mesos on your machine and try to connect with
spark shell from bin dir:
> ./spark-shell --master mesos://zk://localhost:2181/mesos --conf spark.executor.url=$(pwd)/../spark-2.0.0-SNAPSHOT-bin-test.tgz
> It gets stuck at the point where it tries to create the SparkContext.
> Logging gets stuck here:
> I0705 12:10:10.076617  9303 group.cpp:700] Trying to get '/mesos/json.info_0000000152'
in ZooKeeper
> I0705 12:10:10.076920  9304 detector.cpp:479] A new leading master (UPID=master@127.0.1.1:5050)
is detected
> I0705 12:10:10.076956  9303 sched.cpp:326] New master detected at master@127.0.1.1:5050
> I0705 12:10:10.077057  9303 sched.cpp:336] No credentials provided. Attempting to register
without authentication
> I0705 12:10:10.090709  9301 sched.cpp:703] Framework registered with 13553f8b-f42c-4f20-88cd-16f1cc153ede-0001
> I verified it also by changing @transient lazy val log to def and it works as expected.



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