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From "liuhongqiang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (SPARK-18297) Fail if SparkContext run a new Thread in yarn-cluster
Date Mon, 07 Nov 2016 10:41:58 GMT

    [ https://issues.apache.org/jira/browse/SPARK-18297?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15643795#comment-15643795
] 

liuhongqiang edited comment on SPARK-18297 at 11/7/16 10:41 AM:
----------------------------------------------------------------

I use a shared singleton SparkContext in product environment.

The issue is SparkContext can't finish  crrectly in asynchronous thread.


was (Author: smallyard):
I use a shared singleton SparkContext in product environment.

> Fail if SparkContext run a new Thread in yarn-cluster
> -----------------------------------------------------
>
>                 Key: SPARK-18297
>                 URL: https://issues.apache.org/jira/browse/SPARK-18297
>             Project: Spark
>          Issue Type: Bug
>          Components: YARN
>            Reporter: liuhongqiang
>
> program:
> public static void main(String[] args) {
>        Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(new Thread(new
Runnable() {
>             @Override
>             public void run() {
>                 SparkConf conf = new SparkConf();
>                 conf.setAppName("SparkDemo");
>                 JavaSparkContext sparkContext = new JavaSparkContext(conf);
>                 JavaRDD<String> array = sparkContext.parallelize(Lists.newArrayList("1",
"2", "3", "4"));
>                 System.out.println(array.count());
>             }
>         }), 0, 5000, TimeUnit.MILLISECONDS);
>     }
> log:
> 16/11/02 11:16:47 INFO yarn.ApplicationMaster: Starting the user application in a separate
Thread
> 16/11/02 11:16:47 INFO yarn.ApplicationMaster: Waiting for spark context initialization
> 16/11/02 11:16:47 INFO yarn.ApplicationMaster: Waiting for spark context initialization
... 
> 16/11/02 11:16:47 INFO yarn.ApplicationMaster: Final app status: SUCCEEDED, exitCode:
0
> problem:
> mainMethod.invoke(null, userArgs.toArray)
> finish(FinalApplicationStatus.SUCCEEDED, ApplicationMaster.EXIT_SUCCESS)
> main method was finished, but sub thread may be not finished.
> so should not invoke finish to shutdown dirver thread.



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