[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-3999) Race condition in component initialization

Stuart Douglas (JIRA) jira-events at lists.jboss.org
Mon Mar 9 02:16:22 EDT 2009

Race condition in component initialization

                 Key: JBSEAM-3999
                 URL: https://jira.jboss.org/jira/browse/JBSEAM-3999
             Project: Seam
          Issue Type: Bug
          Components: Core
    Affects Versions: 2.1.1.GA
            Reporter: Stuart Douglas

When starting up application (or session) scoped component that do not have an @Startup annotation it is possible to get a race condition where two instances of the component are instantiated, as no locking is present in component initialization. I ran into this when my multi-threaded reporting process was the first component to hit the cache and jboss cache provider got instantiated twice:

`16:54:48,717 INFO  [JbossCacheProvider] Starting JBoss Treecache 1.x
16:54:48,717 INFO  [JbossCacheProvider] Starting JBoss Treecache 1.x`

In this case it is easy to work around, by simply adding startup="true" to the application scoped component. It is also possible to make calls on a component before the create method is called.

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