On Tue, May 5, 2009 at 3:40 AM, Remi <[email protected]>wrote:
> see in error message several lines with "Cannot create > PoolableConnectionFactory (Out of Memory)" or "Caused by: > java.sql.SQLException: Out of Memory", but i need real help to understand > and fix my problem. > (0) Restart your container. And relaunch. Check to see if this error is still there: > Wrapped Exception: com.xpn.xwiki.XWikiException: Error number 0 in 3: > Exception while hibernate execute Wrapped Exception: Could not create a > DBCP > pool. There is an error in the hibernate configuration file, please review If so, beg for additional assistance on list... (Does this error arise from an out of memory condition or indicate version mismatch between db and software?). Independently of that, eliminate out of memory error from possibilities: (1) Increase the memory on your java process. I've been running a vhosted 1.8 system happily for over a month now, nonstop, with the following settings (YMMV, I'm running two large apps in tomcat): tomcat 2040 0.5 60.2 1835160 1230408 ? Sl Apr03 267:28 /usr/java/default/bin/java -server -Xms160m -Xmx1024m -XX:PermSize=160m -XX:MaxPermSize=320m -Djavax.servlet.request.encoding=UTF-8 -Dfile.encoding=UTF-8 -DjavaEncoding=UTF-8 -Djava.awt.headless=true ... Note the gargantuan 1.2g process size... but it just keeps running... It always eventually reaches it's 1.2g (-Xmx1024m) limit but doesn't give out of memory errors. (2) Check on additional customizations as needed. Increase fixed limits in your SQL connector, or in the db it itself? For example with MySQL<http://platform.xwiki.org/xwiki/bin/view/AdminGuide/InstallationMySQL>you need to increase: "-- max_allowed_packet=32M" ... (3) Look into logs more carefully, and run some of the queries that are failing directly into your database. Potentially related, issues with large attachments: http://n2.nabble.com/Bug-%3A-unable-to-delete-attached-files-in-virtual-wikis-tp2434930p2440147.htmland http://n2.nabble.com/Hibernate-exception-when-trying-to-delete-attachment-tp2503343p2504053.html (4) Consult http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Performances for additional tips on Process size, turning off Monitoring, changing cache size, etc. Niels http://nielsmayer.com _______________________________________________ users mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/users
