Resource mapping missing / throwExtensionsFilterMissing reported incorrectly
under load
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Key: TOMAHAWK-1170
URL: https://issues.apache.org/jira/browse/TOMAHAWK-1170
Project: MyFaces Tomahawk
Issue Type: Bug
Components: ExtensionsFilter
Affects Versions: 1.1.7-SNAPSHOT
Reporter: Simon Kitching
It has been reported by two users that under load an application using Tomahawk
intermittently throws an exception claiming "resource mapping missing".
This message is meant to be thrown when a component in a request wants to
register stuff for the extensions filter to output, but the current request
never passed through the extensions filter. This is a sanity check to ensure
that people that misconfigure the ExtensionsFilter get a helpful error message
rather than just having tomahawk components that need additional resources
acting weirdly.
A workaround is to disable this safety check. The first reporter of this
problem did disable the check and found the issue disappeared.
The problem appears to be a race condition between multiple threads *reading* a
map; at least that was the only piece of code I found that had any obvious
thread race issues. I can't remember the exact piece of code for the moment,
but will update this issue when I find it again.
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