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Posted to dev@felix.apache.org by "Felix Meschberger (JIRA)" <ji...@apache.org> on 2012/11/16 18:54:11 UTC
[jira] [Comment Edited] (FELIX-3762) NPE in UpdateConfiguration#run
[ https://issues.apache.org/jira/browse/FELIX-3762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498918#comment-13498918 ]
Felix Meschberger edited comment on FELIX-3762 at 11/16/12 5:53 PM:
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This is probably what happens:
1 Thread created (not started)
2 ConfigurationAdmin service is registered and a ServiceListener is creating or updating configuration
3 An UpdateTask is created which sets the "helper" field in the constructor
4 The managedService[Factory]Trackers are created
5 The threads are started and the UpdateTask executed
The problem is step 3 where the helper field is set as a reference to the appropriate managedService[Factory]Tracker. Since this is still null, this fails.
was (Author: fmeschbe):
Right, I cannot explain this. Maybe a log file (DEBUG level) with more context would help ?
> NPE in UpdateConfiguration#run
> ------------------------------
>
> Key: FELIX-3762
> URL: https://issues.apache.org/jira/browse/FELIX-3762
> Project: Felix
> Issue Type: Bug
> Components: Configuration Admin
> Affects Versions: configadmin-1.6.0
> Reporter: Carsten Ziegeler
>
> During startup I sometimes see a set of these NPE's :
> 16.11.2012 04:48:47.004 *ERROR* [CM Configuration Updater (Update: pid=org.apache.sling.servlets.resolver.SlingServletResolver)] org.apache.felix.configadmin Service [org.apache.felix.cm.ConfigurationAdmin,48] Unexpected problem executing task (java.lang.NullPointerException) java.lang.NullPointerException
> at org.apache.felix.cm.impl.ConfigurationManager$UpdateConfiguration.run(ConfigurationManager.java:1701)
> at org.apache.felix.cm.impl.UpdateThread.run(UpdateThread.java:103)
> at java.lang.Thread.run(Thread.java:662)
> 16.11.2012 04:48:47.005 *INFO* [FelixStartLevel] org.apache.felix.configadmin BundleEvent STARTED
> Looking at the code, it seems the configuration update thread is started before managedServiceTracker or managedServiceFactoryTracker are set in the start() method of the ConfigurationManager
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