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Posted to oak-issues@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2014/07/10 17:37:05 UTC

[jira] [Updated] (OAK-1964) Performance degradation due to SessionDelegate.WarningLock

     [ https://issues.apache.org/jira/browse/OAK-1964?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Dürig updated OAK-1964:
-------------------------------

    Labels: Performance  (was: )

> Performance degradation due to SessionDelegate.WarningLock
> ----------------------------------------------------------
>
>                 Key: OAK-1964
>                 URL: https://issues.apache.org/jira/browse/OAK-1964
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: jcr
>    Affects Versions: 1.0.2, 1.1
>            Reporter: Thomas Mueller
>            Assignee: Michael Dürig
>              Labels: Performance
>
> In OAK-1703, we have added a new class WarningLock that internally uses an Exception to remember the stack trace. This seems to be used for every SessionDelegate object. With Java 6 and older, this is very problematic because it will cause "java.lang.Throwable.fillInStackTrace(Native Method)" to be called for almost every call to any of the Oak JCR methods, and "fillInStackTrace(Native Method)" is known to be be very slow. Java 7, I believe, will at some point give up and not fill in the stack trace any more. But with Java 6 and older, this is a big problem.



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