[jira] [Commented] (HIVE-11768) java.io.DeleteOnExitHook leaks memory on long running Hive Server2 Instances

["Nemon Lou (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-11768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14736138#comment-14736138 ] 

Nemon Lou commented on HIVE-11768:
----------------------------------

The java.io.File.deleteOnExit API is flawed and causes JVM crashes on long running servers ,see [this link|https://bugs.openjdk.java.net/browse/JDK-4872014]
Code path that produce "piepout" file and invoking File.deleteOnExit() is [here|https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/session/SessionState.java#L802]
{code:java}
    File tmpFile = File.createTempFile(sessionID, ".pipeout", tmpDir);
    tmpFile.deleteOnExit();
{code}

> java.io.DeleteOnExitHook leaks memory on long running Hive Server2 Instances
> ----------------------------------------------------------------------------
>
>                 Key: HIVE-11768
>                 URL: https://issues.apache.org/jira/browse/HIVE-11768
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>    Affects Versions: 1.2.1
>            Reporter: Nemon Lou
>
>   More than 490,000 paths was added to java.io.DeleteOnExitHook on one of our long running HiveServer2 instances,taken up more than 100MB on heap.
>   Most of the paths contains a suffix of ".piepout".



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