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https://issues.apache.org/jira/browse/TAPESTRY-2723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12662757#action_12662757
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michael wasserman commented on TAPESTRY-2723:
---------------------------------------------
The line numbers may be off due to debugging code that we've placed in the
source.
The exception is being thrown at the following lines in the getComponent()
method:
if (result == null)
throw new
ApplicationRuntimeException(Tapestry.format("no-such-component", this, id),
this, null, null);
The problem is that result is never set because the _components HashMap is null.
We believe we may have found a solution to this problem.
By placing the line "_pageSpecificationResolver.resolve(_cycle,
pageKey.getPageName());"
from PageSource.makeObject(Object key) in a synchronize block we have so far
been unable to recreate the exception.
We are intending to test more aggressively on Monday/Tuesday and will report
our findings then.
> Compenents that should be found are not found during page loading
> -----------------------------------------------------------------
>
> Key: TAPESTRY-2723
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2723
> Project: Tapestry
> Issue Type: Bug
> Components: Framework
> Affects Versions: 4.1.6
> Environment: Windows XP Service pack 3 - 1.86 GHz, 3 GB of ram -
> JBoss - Tapestry 4.1.6
> Reporter: michael wasserman
> Assignee: Andreas Andreou
> Attachments: StackTrace.txt
>
>
> When AbstractComponent.getComponents(String) is called the HashMap
> "_components" is unexpectedly null, causing an ApplicationRuntimeException
> which indicates that the given component (id passed as parameter to
> getComponents(String)), does not exist. We have confirmed that in every
> instance the given component does exist in the given page.
> This problem happens randomly on a variety of pages.
> This could be an indication of a thread safety problem in the PageLoader
> class. We can duplicate the problem, (unreliably), via our selenium test
> suite.
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