Bug 863346

Summary: Plug-in data directories are not preserved during agent auto-update
Product: [Other] RHQ Project Reporter: Andreas Veithen <andreas.veithen>
Component: AgentAssignee: RHQ Project Maintainer <rhq-maint>
Status: CLOSED WONTFIX QA Contact: Mike Foley <mfoley>
Severity: low Docs Contact:
Priority: unspecified    
Version: 4.5CC: andreas.veithen, hrupp
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Hardware: x86_64   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2017-03-18 17:13:51 EDT Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Andreas Veithen 2012-10-05 03:50:36 EDT
According to the Javadoc of PluginContext#getDataDirectory(), the directory returned by that method (which is $RHQ_AGENT_HOME/data/<plug-in name>) is a "Directory where plugins can store persisted data that survives agent restarts".

The obvious expectation is that this remains true even during an auto-update of the agent. In fact, since the auto-update only changes the version of the plug-in container, but not the version of the plug-ins (at least not for custom plug-ins), there is no reason why the plug-in data directories would be reset.

However, the observed behavior during an auto-update (from 3.0.0 to 4.5.1) is that the data directories are moved together with the old agent installation (to $RHQ_AGENT_HOME-OLD) and not restored to the new agent installation.
Comment 1 Heiko W. Rupp 2013-07-01 06:29:02 EDT

after the agent has auto-updated, it will get new(er) plugin versions from the server which also has updated and is (at least for stock RHQ plugins) thus also having newer plugins.
Do I understand you correctly that your custom plugin is staying the same and thus expects to e.g. fetch temporary data from the data/ directory, which has gone?