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From "Rupert Westenthaler (JIRA)" <j...@apache.org>
Subject [jira] [Created] (STANBOL-117) Initialization of the Entityhub sometimes fails during integration tests
Date Mon, 21 Mar 2011 10:07:05 GMT
Initialization of the Entityhub sometimes fails during integration tests
------------------------------------------------------------------------

                 Key: STANBOL-117
                 URL: https://issues.apache.org/jira/browse/STANBOL-117
             Project: Stanbol
          Issue Type: Bug
         Environment: Integration tests on hudson 
            Reporter: Rupert Westenthaler
            Assignee: Rupert Westenthaler


Sometimes the initialization of the Entityhub based on the default configuration provided
by the full launcher of the Stanbol Enhancer fails.

The reason for that is that the EmbeddedSolrServerProvider is not available at the time when
the SolrYard instances do request an SolrServer with the type EMBEDDED.
However note that the EmbeddedSolrServerProvider is already registered before but get the
unregistered shortly before the SolerServer instance is activated.

The complete log is available at: https://builds.apache.org/hudson/job/stanbol-trunk-1.6/org.apache.stanbol$org.apache.stanbol.enhancer.integration-tests/ws/sling/logs/error.log

Here the interesting sections of the log.

(1)  Time: 02:36:42.670
Bot the DefaultSolrServerProvider and the EmbeddedSolrServerProvider get registered with the
EmbeddedSolrServerProvider

21.03.2011 02:36:42.668 *INFO* [SCR Component Actor] org.apache.felix.scr Running task: Enable
Component: org.apache.stanbol.entityhub.yard.solr.provider.SolrServerProviderManager (6)
21.03.2011 02:36:42.669 *INFO* [SCR Component Actor] org.apache.stanbol.entityhub.yard.solr.provider.SolrServerProviderManager
add SolrProvider org.apache.stanbol.entityhub.yard.solr.embedded.EmbeddedSolrPorovider@6f947b
types [EMBEDDED]
21.03.2011 02:36:42.670 *INFO* [SCR Component Actor] org.apache.stanbol.entityhub.yard.solr.provider.SolrServerProviderManager
add SolrProvider org.apache.stanbol.entityhub.yard.solr.impl.DefaultSolrServerProvider@15ad1da
types [HTTP, STREAMING, LOAD_BALANCE]

(2) Time: 02:36:42.945
SolrYard (configured to use an EmbeddedSolrServer) activates

21.03.2011 02:36:42.945 *INFO* [Configuration Updater] org.apache.stanbol.entityhub.yard.solr.impl.SolrYard
in class org.apache.stanbol.entityhub.yard.solr.impl.SolrYard activate with context org.apache.felix.scr.impl.manager.ComponentContextImpl@157211f

(3) Time: 21.03.2011 02:36:42.945
In the same millisecond the EmbeddedSolrServerProvider gets unregistered form the SolrServerProviderManager

21.03.2011 02:36:42.945 *INFO* [SCR Component Actor] org.apache.stanbol.entityhub.yard.solr.provider.SolrServerProviderManager
remove SolrProvider org.apache.stanbol.entityhub.yard.solr.embedded.EmbeddedSolrPorovider@6f947b
types [EMBEDDED]
21.03.2011 02:36:42.945 *INFO* [SCR Component Actor] org.apache.stanbol.entityhub.yard.solr
Service [org.apache.stanbol.entityhub.yard.solr.embedded.EmbeddedSolrPorovider,40] ServiceEvent
UNREGISTERING

(4) Time 02:36:42.946
1ms later the SolrServerProviderManager throws an Exception because no SolrServerProvider
for the type EMBEDDED is available

21.03.2011 02:36:42.946 *ERROR* [Configuration Updater] org.apache.stanbol.entityhub.yard.solr
[org.apache.stanbol.entityhub.yard.solr.impl.SolrYard] The activate method has thrown an exception
(java.lang.IllegalArgumentException: No Provider for type EMBEDDED available) java.lang.IllegalArgumentException:
No Provider for type EMBEDDED available
	at org.apache.stanbol.entityhub.yard.solr.provider.SolrServerProviderManager.getSolrServer(SolrServerProviderManager.java:98)
        ...

(5) 02:36:42.946
Now the second configured SolrYard activates and fails because there is still no SolrServerProvider
for the type EMBEDDED

21.03.2011 02:36:42.946 *INFO* [Configuration Updater] org.apache.stanbol.entityhub.yard.solr.impl.SolrYard
in class org.apache.stanbol.entityhub.yard.solr.impl.SolrYard activate with context org.apache.felix.scr.impl.manager.ComponentContextImpl@82c23d
21.03.2011 02:36:42.947 *ERROR* [Configuration Updater] org.apache.stanbol.entityhub.yard.solr
[org.apache.stanbol.entityhub.yard.solr.impl.SolrYard] The activate method has thrown an exception
(java.lang.IllegalArgumentException: No Provider for type EMBEDDED available) java.lang.IllegalArgumentException:
No Provider for type EMBEDDED available
	at org.apache.stanbol.entityhub.yard.solr.provider.SolrServerProviderManager.getSolrServer(SolrServerProviderManager.java:98)
        ...

(6) 02:36:42.948
2ms later the EmbeddedSolrPorovider is added again to the SolrServerProviderManager

21.03.2011 02:36:42.948 *INFO* [SCR Component Actor] org.apache.stanbol.entityhub.yard.solr.provider.SolrServerProviderManager
add SolrProvider org.apache.stanbol.entityhub.yard.solr.embedded.EmbeddedSolrPorovider@8917a2
types [EMBEDDED]



The important thing would be to understand why the EmbeddedSolrServerProvider gets unregistered
in (3) and than registered again in (6).
Also note that there are two threads ([SCR Component Actor] and [Configuration Updater]) working
at the same time.



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