[jira] [Updated] (OOZIE-1826) Add thread which detects JVM pauses

["Robert Kanter (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/OOZIE-1826?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Kanter updated OOZIE-1826:
---------------------------------

    Attachment: OOZIE-1826.patch

The patch adds a new "JvmPauseMonitorService".  Most of the code is copy-pasted from HADOOP-9618; I made some changes for the configs, to make it an Oozie Service, added instrumentation, and formatting.

There's two config properties that let you set the threshold for logging a WARN level message and an INFO level message.  There's also instrumentation counters for each of them.  I also added an instrumentation counter for the total amount of extra time sleeping.

No tests because it would be difficult to write a unit test for this, but I did verify that it appeared to be working properly; plus Hadoop and HBase have been using it.

> Add thread which detects JVM pauses
> -----------------------------------
>
>                 Key: OOZIE-1826
>                 URL: https://issues.apache.org/jira/browse/OOZIE-1826
>             Project: Oozie
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: trunk
>            Reporter: Robert Kanter
>            Assignee: Robert Kanter
>         Attachments: OOZIE-1826.patch
>
>
> It would be helpful for debugging to add a thread which detects JVM pauses and logs them and indicates them in the instrumentation/metrics).  This was added to Hadoop by HADOOP-9618 (and also HBASE by HBASE-9630), so we can adapt that for Oozie.



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