[jira] [Created] (ARIES-1089) Handlers map in NamespaceHandlerSetImpl is unsafe.

["John Ross (JIRA)" <ji...@apache.org>]

John Ross created ARIES-1089:
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             Summary: Handlers map in NamespaceHandlerSetImpl is unsafe.
                 Key: ARIES-1089
                 URL: https://issues.apache.org/jira/browse/ARIES-1089
             Project: Aries
          Issue Type: Bug
          Components: Blueprint
            Reporter: John Ross


The NamespaceHandlerSetImpl class uses an unprotected map to store handlers. The map is accessible to multiple threads. For example, the thread delivering the NamespaceHandler service registration event will store the handler in the map and eventually call BlueprintContainerImpl.schedule, which spawns off another thread that will look for a handler in the map.

We appear to be encountering a visibility issue where the org.apache.aries.application.resolver.obr bundle will never activate because blueprint thinks the required namespace handler is not available. However, the logs clearly show the namespace handler being registered anywhere from a millisecond to one or two seconds previously.

Would there be any objections to using a ConcurrentHashMap?

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