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Date: Fri, 15 Jan 2016 17:01:39 +0000 (UTC)
From: "ASF GitHub Bot (JIRA)" <jira@apache.org>
To: dev@apex.incubator.apache.org
Message-ID: <JIRA.12924555.1451332351000.123393.1452877299825@Atlassian.JIRA>
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 <JIRA.12924555.1451332351709@arcas>
Subject: [jira] [Commented] (APEXCORE-296) App Master Dies With 1 gb of
 memory
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    [ https://issues.apache.org/jira/browse/APEXCORE-296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15102070#comment-15102070 ] 

ASF GitHub Bot commented on APEXCORE-296:
-----------------------------------------

Github user amberarrow commented on a diff in the pull request:

    https://github.com/apache/incubator-apex-core/pull/203#discussion_r49877090
  
    --- Diff: engine/src/main/java/com/datatorrent/stram/StreamingContainerManager.java ---
    @@ -1027,6 +1027,19 @@ public int processEvents()
             }
           }
           o.stats.lastWindowedStats = stats;
    +      if (!o.stats.responses.isEmpty()) {
    +        if (o.stats.operatorResponses == null) {
    +          o.stats.operatorResponses = new ArrayList<>();
    +        } else {
    +          o.stats.operatorResponses.clear();
    +        }
    +        StatsListener.OperatorResponse operatorResponse;
    +        while ((operatorResponse = o.stats.responses.poll()) != null) {
    +          o.stats.operatorResponses.add(operatorResponse);
    +        }
    +      } else {
    +        o.stats.operatorResponses = null;
    --- End diff --
    
    This version tries to avoid creating garbage by reusing the ArrayList if one is already present.


> App Master Dies With 1 gb of memory
> -----------------------------------
>
>                 Key: APEXCORE-296
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-296
>             Project: Apache Apex Core
>          Issue Type: Bug
>    Affects Versions: 3.0.0, 3.1.0, 3.2.0, 3.1.1, 3.3.0, 3.2.1
>            Reporter: Timothy Farkas
>            Assignee: gaurav gupta
>
> When the App Master only has 1gb of memory it dies. When the memory is increased to 2gb it runs fine. Often times the App Master dies abruptly without any log messages, occasionally there is an OutOfMemoryException. 


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