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https://issues.apache.org/activemq/browse/SM-2011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=63406#action_63406
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Kurt Westerfeld commented on SM-2011:
-------------------------------------
Another update. I added a log message to each of the three services in
question's constructor. When this problem occurs, spring does not even create
the three services--only 2 of them are created.
What could cause this? It no longer looks like a servicemix/nmr init timing
issue, but one of spring's basic construction of services. Specifically, the
cxfse:endpoint is simply not generating a new class in 1 of these 3 services.
Quite baffling.
> NMR Registration Fails on Startup Intermittently
> ------------------------------------------------
>
> Key: SM-2011
> URL: https://issues.apache.org/activemq/browse/SM-2011
> Project: ServiceMix
> Issue Type: Bug
> Environment: Fuse 4.3
> Reporter: Kurt Westerfeld
> Priority: Critical
>
> We have a number of services which start when servicemix starts, based on
> servicemix-cxf-se, which publish endpoints to the NMR implicitly by using
> org.apache.servicemix.common.osgi.EndpointExporter. We are seeing the
> situation where after startup, some of our services are missing from the
> endpoint registry. We cannot see them using the admin command "nmr:list",
> and in tracking this down, have noticed that the
> org.apache.servicemix.nmr.core.EndpointRegistryImpl does not contain a
> mapping for the service. This is clearly a bug, because if we do an
> osgi:restart on the bundle containing our service the NMR will correctly
> register the endpoints.
> This is obviously causing us concern. We have worked around other
> initialization problems with our servicemix-cxf-se services related to
> generation of proxies by injecting the component registry
> (org.apache.servicemix.jbi.runtime.ComponentRegistry) to the proxy. We are
> wondering if there is a similar workaround we must perform in order to ensure
> our components do not initialize before the NMR service registry tracker is
> ready to receive them.
> Noticing a normal initialization sees this stacktrace fragment:
>
> org.apache.servicemix.nmr.core.EndpointRegistryImpl.register(org.apache.servicemix.nmr.api.Endpoint,
> java.util.Map<java.lang.String,?>) line: 115
>
> org.apache.servicemix.nmr.core.EndpointRegistryImpl.register(java.lang.Object,
> java.util.Map) line: 49
>
> org.apache.servicemix.nmr.osgi.OsgiServiceRegistryTracker<T>.addingService(org.osgi.framework.ServiceReference)
> line: 78
> So, it seems that the
> org.apache.servicemix.nmr.osgi.OsgiServiceRegistryTracker listener must be
> getting initialized *after* our own bundle in this case. Since this class
> registers a service tracker, it is my bet that it is not tracking services
> before our service's endpoint exporter has started running. In another odd
> twist, the main culprit in our use case exports 3 services, and only one of
> them seems to be missing.
> The complexity of getting our services to start properly and reliably has
> been the most significant issue facing us in our port from servicemix 3 to 4.
> We'd appreciate some help and/or fixes to get us moving in the right
> direction.
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