[ http://issues.apache.org/jira/browse/JCR-120?page=all ]
Jukka Zitting resolved JCR-120:
-------------------------------
Resolution: Fixed
Fixed as suggested in revision 179394.
Please reopen this issue if a better workaround is found.
> Jackrabbit fails to shutdown properly when tomcat is shutting down
> ------------------------------------------------------------------
>
> Key: JCR-120
> URL: http://issues.apache.org/jira/browse/JCR-120
> Project: Jackrabbit
> Type: Improvement
> Components: observation
> Reporter: fabrizio giustina
> Assignee: Jukka Zitting
> Priority: Minor
> Attachments: JCR-120.diff, shutdown1.png, shutdown2.png
>
> This is the same issue already discudded in
> http://issues.apache.org/jira/browse/JCR-57
> The problem only occurs when Jackrabbit is deployed in the WEB-INF/lib
> directory of a web application in Tomcat.
> During dispose() jackrabbit tries to instantiate a few objects from classes
> which were not previously loaded by the webapp classloader, but tomcat
> doesn't allow to load new classes while shutting down.
> This causes the repository not to be closed properly, and an annoying set of
> stack traces are written to the log.
> It seems that there are only two classes which are loaded in this situation:
> org.apache.jackrabbit.core.observation.EventListenerIteratorImpl and
> org.apache.jackrabbit.core.fs.FileSystemPathUtil. This is the log from the
> server standard output:
> org.apache.catalina.loader.WebappClassLoader loadClass
> INFO: Illegal access: this web application instance has been stopped already.
> Could not load
> org.apache.jackrabbit.core.observation.EventListenerIteratorImpl. The
> eventual following stack trace is caused by an error thrown for debugging
> purposes as well as to attempt to terminate the thread which caused the
> illegal access, and has no functional impact.
> [repeaded more times at each shutdown]
> org.apache.catalina.loader.WebappClassLoader loadClass
> INFO: Illegal access: this web application instance has been stopped already.
> Could not load org.apache.jackrabbit.core.fs.FileSystemPathUtil. The
> eventual following stack trace is caused by an error thrown for debugging
> purposes as well as to attempt to terminate the thread which caused the
> illegal access, and has no functional impact.
> A quick fix is to force preloading of classes normally needed only during
> shutdown, simply adding a static block to caller classes. The following patch
> makes tomcat happy, causing classes to be loaded by the webapp classloaded
> when still allowed (probably not really elegant, but perfectly working...)
> Index: org/apache/jackrabbit/core/fs/FileSystemResource.java
> ===================================================================
> --- src\java\org\apache\jackrabbit\core\fs\FileSystemResource.java
> (revision 169503)
> +++ src\java\org\apache\jackrabbit\core\fs\FileSystemResource.java
> (working copy)
> @@ -30,6 +30,11 @@
>
> protected final String path;
>
> + static {
> + // preload FileSystemPathUtil to prevent classloader issues during
> shutdown
> + FileSystemPathUtil.class.hashCode();
> + }
> +
> /**
> * Creates a new <code>FileSystemResource</code>
> *
> Index: org/apache/jackrabbit/core/observation/ObservationManagerImpl.java
> ===================================================================
> ---
> src\java\org\apache\jackrabbit\core\observation\ObservationManagerImpl.java
> (revision 169503)
> +++
> src\java\org\apache\jackrabbit\core\observation\ObservationManagerImpl.java
> (working copy)
> @@ -54,6 +54,11 @@
> */
> private final ObservationManagerFactory obsMgrFactory;
>
> + static {
> + // preload EventListenerIteratorImpl to prevent classloader issues
> during shutdown
> + EventListenerIteratorImpl.class.hashCode();
> + }
> +
> /**
> * Creates an <code>ObservationManager</code> instance.
> *
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