>
> Hello,
>
> I'm facing a problem when deploying Orbeon in WebSphere v7, which has
> sessions configured to be non-persistent.
>
> The problem arise when I stop my application (not the whole server, only my
> application) and restart the app. Then trying to execute anything in the
> application causes an unfamous exist-related error:
> "The database directory seems to be locked by another database instance"
>
> Here is part of the log file for this error:
>
> 2010-12-02 11:43:52,843 INFO  FileLock  - File lock last access timestamp:
> 02-dic-2010 C:\Program
> Files\IBM\WebSphere\AppServer7\profiles\AppSrv01\installedApps\acf9f1926Node02Cell\Sirius_ear.ear\Sirius.war\WEB-INF\exist-data\dbx_dir.lck
> 2010-12-02 11:43:52,843 INFO  FileLock  - Waiting a short time for the lock
> to be released... C:\Program
> Files\IBM\WebSphere\AppServer7\profiles\AppSrv01\installedApps\acf9f1926Node02Cell\Sirius_ear.ear\Sirius.war\WEB-INF\exist-data\dbx_dir.lck
> 2010-12-02 11:44:03,046 INFO  FileLock  - File lock last access timestamp:
> 02-dic-2010 C:\Program
> Files\IBM\WebSphere\AppServer7\profiles\AppSrv01\installedApps\acf9f1926Node02Cell\Sirius_ear.ear\Sirius.war\WEB-INF\exist-data\dbx_dir.lck
> 2010-12-02 11:44:03,046 INFO  FileLock  - Waiting a short time for the lock
> to be released... C:\Program
> Files\IBM\WebSphere\AppServer7\profiles\AppSrv01\installedApps\acf9f1926Node02Cell\Sirius_ear.ear\Sirius.war\WEB-INF\exist-data\dbx_dir.lck
> 2010-12-02 11:44:13,250 DEBUG XFormsServer  - throwable caught during
> initialization.
> 2010-12-02 11:44:13,250 ERROR ProcessorService  - Exception at line 135,
> column 60 of oxf:/ops/pfc/xforms-epilogue.xpl (reading processor output:
> name='document', id='xhtml-data')
> org.exist.EXistException: The database directory seems to be locked by
> another database instance. Found a valid lock file: C:\Program
> Files\IBM\WebSphere\AppServer7\profiles\AppSrv01\installedApps\acf9f1926Node02Cell\Sirius_ear.ear\Sirius.war\WEB-INF\exist-data\dbx_dir.lck
>        at org.exist.storage.BrokerPool.canReadDataDir(BrokerPool.java:680)
>        at org.exist.storage.BrokerPool.<init>(BrokerPool.java:632)
>        at org.exist.storage.BrokerPool.configure(BrokerPool.java:203)
>        at org.exist.xmldb.DatabaseImpl.configure(DatabaseImpl.java:100)
>        at org.exist.xmldb.DatabaseImpl.getLocalCollection(DatabaseImpl.java:175)
>        at org.exist.xmldb.DatabaseImpl.getCollection(DatabaseImpl.java:155)
>        at org.exist.xmldb.DatabaseImpl.getCollection(DatabaseImpl.java:150)
>        at org.xmldb.api.DatabaseManager.getCollection(Unknown Source)
>        at
> org.orbeon.oxf.processor.xmldb.XMLDBProcessor.getCollection(XMLDBProcessor.java:156)
>        at
> org.orbeon.oxf.processor.xmldb.XMLDBProcessor.executeQuery(XMLDBProcessor.java:220)
>        at
> org.orbeon.oxf.processor.xmldb.XMLDBProcessor.query(XMLDBProcessor.java:179)
>        at
> org.orbeon.oxf.xforms.state.XFormsPersistentApplicationStateStore$XMLDBAccessor.query(XFormsPersistentApplicationStateStore.java:321)
>        at
> org.orbeon.oxf.xforms.state.XFormsPersistentApplicationStateStore.executeQuery(XFormsPersistentApplicationStateStore.java:224)
>        at
> org.orbeon.oxf.xforms.state.XFormsPersistentApplicationStateStore.expireAllPersistentUseCollection(XFormsPersistentApplicationStateStore.java:142)
>        at
> org.orbeon.oxf.xforms.state.XFormsPersistentApplicationStateStore.instance(XFormsPersistentApplicationStateStore.java:117)
>        at
> org.orbeon.oxf.xforms.state.XFormsStateManager.storeDocumentState(XFormsStateManager.java:200)
>        at
> org.orbeon.oxf.xforms.state.XFormsStateManager.cacheOrStore(XFormsStateManager.java:178)
>        at
> org.orbeon.oxf.xforms.state.XFormsStateManager.afterInitialResponse(XFormsStateManager.java:75)
>        at
> org.orbeon.oxf.xforms.processor.XFormsToXHTML.doIt(XFormsToXHTML.java:224)
>        at
> org.orbeon.oxf.xforms.processor.XFormsToXHTML.access$000(XFormsToXHTML.java:43)
>        at
> org.orbeon.oxf.xforms.processor.XFormsToXHTML$1.readImpl(XFormsToXHTML.java:64)
>        at
> org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
>        at
> org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
>        [...]
>
>
> After some investigation, I have found the origin of this error. This is the
> sequence of events:
>
> * Stop the application
> ** The servlets are destroyed
> *** The EXistServlet stops the database instances
> ** The sessions are destroyed
> *** Orbeon calls its SessionListeners
> **** XFormsStateStore is notified and calls expireBySessionId()
> **** XFormsPersistentApplicationStateStore executes a query to delete the
> session data
> ***** BUT as the database instance has been stopped, a new instance is
> configured and started
> ** The servlet context is destroyed
>
> The result is that there is a database instance that is still alive although
> the application has been stopped.
> This live database instance is what is causing the error above.
>
> Here is a log when the application stop:
>
> 2010-12-02 11:40:39,937 INFO  ProcessorService  - Servlet - Servlet
> destroyed.
> 2010-12-02 11:40:40,015 INFO  FileLock  - Deleting lock file: C:\Program
> Files\IBM\WebSphere\AppServer7\profiles\AppSrv01\installedApps\acf9f1926Node02Cell\Sirius_ear.ear\Sirius.war\WEB-INF\exist-data\journal.lck
> 2010-12-02 11:40:40,015 INFO  FileLock  - Deleting lock file: C:\Program
> Files\IBM\WebSphere\AppServer7\profiles\AppSrv01\installedApps\acf9f1926Node02Cell\Sirius_ear.ear\Sirius.war\WEB-INF\exist-data\dbx_dir.lck
> 2010-12-02 11:40:40,015 INFO  ProcessorService  - Servlet - Servlet
> destroyed.
> 2010-12-02 11:40:40,125 INFO  Configuration  - Reading configuration from
> file C:\Program
> Files\IBM\WebSphere\AppServer7\profiles\AppSrv01\installedApps\acf9f1926Node02Cell\Sirius_ear.ear\Sirius.war\WEB-INF\exist-conf.xml
> 2010-12-02 11:40:40,156 WARN  eXistURLStreamHandlerFactory  - The JVM has
> already an URLStreamHandlerFactory registered, skipping...
> 2010-12-02 11:40:40,156 INFO  eXistURLStreamHandlerFactory  - System
> property java.protocol.handler.pkgs has not been updated.
> 2010-12-02 11:40:40,171 INFO  Configuration  - Add catalog uri
> file:/C:/Program%20Files/IBM/WebSphere/AppServer7/profiles/AppSrv01/installedApps/acf9f1926Node02Cell/Sirius_ear.ear/Sirius.war//WEB-INF/catalog.xml
> 2010-12-02 11:40:40,171 INFO  GrammarPool  - Initializing GrammarPool.
> 2010-12-02 11:40:40,250 INFO  DefaultCacheManager  - Cache settings:
> 49.152k; totalPages: 12.288; maxCacheSize: 11.059
> 2010-12-02 11:40:40,250 INFO  XQueryPool  - QueryPool: size = 128;
> maxStackSize = 5; timeout = 120.000; timeoutCheckInterval = 30.000
> 2010-12-02 11:40:40,281 INFO  IndexManager  - Registered index
> org.exist.indexing.ngram.NGramIndex as ngram-index
> 2010-12-02 11:40:40,281 INFO  IndexManager  - Registered index
> org.exist.fulltext.FTIndex as ft-legacy-index
> 2010-12-02 11:40:40,359 INFO  DatabaseImpl  - Collection
> /db/orbeon/xforms/cache not found
> 2010-12-02 11:40:40,609 INFO  OrbeonSessionListener  - Session Listener -
> Session destroyed.
> 2010-12-02 11:40:41,140 INFO  OrbeonServletContextListener  - Servlet
> Context Listener - Context destroyed.
>
> Please, could you fix this issue?
>
> Thanks in advance.
> jpereza
>
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