Bill Lucy created MYFACES-4320:
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Summary: Startup ConcurrentModificationException in
DefaultFacesConfigurationProvider
Key: MYFACES-4320
URL: https://issues.apache.org/jira/browse/MYFACES-4320
Project: MyFaces Core
Issue Type: Bug
Affects Versions: 2.3.6, 2.2.12
Reporter: Bill Lucy
Assignee: Bill Lucy
In an environment with multiple apps, it's possible to hit a
_ConcurrentModificationException_ during startup:
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1456)
at java.util.HashMap$KeyIterator.next(HashMap.java:1480)
at
org.apache.myfaces.config.DefaultFacesConfigurationProvider.getMetaInfServicesFacesConfig(DefaultFacesConfigurationProvider.java:218)
This occurs because _Set<String> FACTORY_NAMES_ is static, but the
initialization block following it is not. So it's possible for that
initialization block to get run - if a new _DefaultFacesConfigurationProvider_
is initialized at the right time - while another instance is iterating over the
set. The fix is to make the initialization block static, which we just need to
backport from the master branch.
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