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Date: Wed, 1 Jun 2016 00:13:12 +0000 (UTC)
From: "David Jencks (JIRA)" <jira@apache.org>
To: dev@felix.apache.org
Message-ID: <JIRA.12974396.1464739948000.344203.1464739992817@Atlassian.JIRA>
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Subject: [jira] [Created] (FELIX-5270) [DS] Config race between update and
 delete
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archived-at: Wed, 01 Jun 2016 00:13:19 -0000

David Jencks created FELIX-5270:
-----------------------------------

             Summary: [DS] Config race between update and delete
                 Key: FELIX-5270
                 URL: https://issues.apache.org/jira/browse/FELIX-5270
             Project: Felix
          Issue Type: Bug
          Components: Declarative Services (SCR)
    Affects Versions: scr-2.0.2
            Reporter: David Jencks
            Assignee: David Jencks
             Fix For: scr-2.0.4


Thanks to Fabian Lange for reporting this problem and providing logging that shows what is going on.

The first getConfiguration when the location is not set generates a LocationChanged event.  When we get such an event, we get the configuration to see what happened.

DS: (either from query or initial CM_UPDATED event) calls getConfiguration, setting the bundle location and generating a CM_LOCATION_CHANGED event.
User: delete configuration, setting the properties to null
DS: receive CM_LOCATION_CHANGED, call getConfiguration (incidentally recreating the configuration) and get configuration with null properties and a location.  We then throw:

                            if (configInfo.getProps() == null)
                            {
                                throw new IllegalStateException("Existing Configuration with pid " + pid +
                                        " has had its properties set to null and location changed.  We expected a delete event first.");
                            }


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