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Posted to dev@felix.apache.org by "Karl Pauls (JIRA)" <ji...@apache.org> on 2007/08/09 18:47:42 UTC
[jira] Updated: (FELIX-335) Configuration Admin updates with empty
properties and throws NullPointerExceptions due to race condition
[ https://issues.apache.org/jira/browse/FELIX-335?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Karl Pauls updated FELIX-335:
-----------------------------
Attachment: empty-properties.patch
> Configuration Admin updates with empty properties and throws NullPointerExceptions due to race condition
> --------------------------------------------------------------------------------------------------------
>
> Key: FELIX-335
> URL: https://issues.apache.org/jira/browse/FELIX-335
> Project: Felix
> Issue Type: Bug
> Components: Configuration Admin
> Reporter: Karl Pauls
> Attachments: empty-properties.patch
>
>
> There appears to be a race condition in the configuration admin that allows managed services to get updated with empty properties (but not null). Furthermore, due to the same bug NullPointerExceptions appear under heavy load.
> Fortunately, I think I was able to isolate the bug. The issue is that configurations are persisted when created but before they are initialized (i.e., given a configuration). If during this window a new ManagedService appears it gets updated with an empty Dictionary. Likewise, if the configuration is re-read after such an update attempt it does not have a pid which causes the null pointer exceptions.
> The fix seems to be rather simple (unless I'm missing something :-) but took me some time to figure out.
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