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From "Robert Zeigler (JIRA)" <...@tapestry.apache.org>
Subject [jira] Commented: (TAPESTRY-2037) NullPointerException caused by many rapid page refreshes
Date Mon, 31 Mar 2008 19:06:25 GMT

    [ https://issues.apache.org/jira/browse/TAPESTRY-2037?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12583800#action_12583800

Robert Zeigler commented on TAPESTRY-2037:

I haven't seen the exception now for three weeks and counting, even in the app where, before,
I was seeing it several times daily.
I think it's safe to call this one fixed.

> NullPointerException caused by many rapid page refreshes
> --------------------------------------------------------
>                 Key: TAPESTRY-2037
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2037
>             Project: Tapestry
>          Issue Type: Bug
>          Components: tapestry-core, tapestry-ioc
>    Affects Versions: 5.0.7
>         Environment: jdk 1.5
>            Reporter: Howard M. Lewis Ship
>            Assignee: Howard M. Lewis Ship
>            Priority: Critical
>             Fix For: 5.0.12
> This was reported on the mailing list.
> In certain places, hitting the refresh button rapidly can cause a null pointer exception.
> It is believed this is related to a JDK 1.5 bug:
> http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6550283
> Tapestry makes a few uses of ThreadLocal that are consistent with this pattern.  ThreadLocals
are used to connect service proxies to perthread scope services.
> We will locate all useages of ThreadLocal and, alas, synchronize access to them.
> More discussion: http://markmail.org/message/7bwztu66paz2cfqm

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