Thanks for the info. I am planning to move the farm to 6.2 anyway, so hopefully the issue will be fixed after the upgrade. I'll ask again if I have trouble keeping it stable on the most recent version.
On Sat, Sep 6, 2014 at 1:00 AM, Thomas Mortagne <[email protected]> wrote: > It's not exactly in SOLR but it's triggered by SOLR when it's > rendering the pages titiles. See > http://jira.xwiki.org/browse/XWIKI-10382. The fix is part of the > comming 5.4.6. > > On Fri, Sep 5, 2014 at 7:13 PM, Aaron Hardy at AC > <[email protected]> wrote: > > Hi, > > > > I'm experiencing frequent crashes that I think are related to Solr, and > I'd > > appreciate any advice on how to fix them. > > > > I have a fairly large wiki (with several thousand attachments) running > > 5.4.3 on tomcat7, and it goes down multiple times a day. Sometimes it > will > > remain unresponsive for a few minutes then come back on its own, other > > times it stays down until I restart tomcat. Usage runs anywhere from a > few > > active users to several thousand, depending on time of day. Crashes > happen > > even when the number of users is low. > > > > Checking catalina.out and the localhost_access logs, there almost always > > appears to be requests related to solr around the time it goes down. > > Sometimes catalina.out shows a java heap out of memory error, but other > > times there are no errors in the logs at all, the site is just > unresponsive. > > > > I can usually reproduce the issue by running several searches back to > back, > > while browsing pages in another tab. While the searches are in progress, > > the responsiveness of browsing pages steadily drops until it times out. > It > > usually only takes 5 or 10 searches before this happens. > > > > The other thing that makes me suspect Solr is that even when the site > > doesn't crash, while running a search in one tab, requests in the other > tab > > don't finish until the search is complete - it (subjectively, I know) > feels > > like other requests are suspended while Solr is thinking. > > > > Potentially related is that I occasionally also see JDBC connection pool > > related errors in the logs when it goes down - I have tried tweaking my > > connection pool size settings, to no avail. > > > > My current java memory settings are: > > JAVA_OPTS="-Djava.awt.headless=true -Xms2500m -Xmx2500m -XX:PermSize=64m > > -XX:MaxPermSize=256m -XX:+UseConcMarkSweepGC" > > > > I've used everything from the 800m xwiki.org settings to 3GB+, and it > > doesn't seem to make a difference. > > > > I have also reduced the cache settings from 3000 back to 100 in > > xwiki.properties, which hasn't helped. > > > > My hibernate settings are: > > connection.pool.size = 100 > > statement_cache.size = 50 > > dbcp.maxActive = 100 > > dbcp.maxIdle = 10 > > dbcp.maxWait = 300000 > > > > Mysql max_connections is set to 290 > > > > I have changed nearly all of those numbers at some point, but nothing > seems > > to help. > > > > Any assistance is greatly appreciated - even just tips on how to > > troubleshoot what's actually taking the site down, since the logs aren't > > always useful. > > > > thanks, > > > > aaron > > _______________________________________________ > > users mailing list > > [email protected] > > http://lists.xwiki.org/mailman/listinfo/users > > > > -- > Thomas Mortagne > _______________________________________________ > users mailing list > [email protected] > http://lists.xwiki.org/mailman/listinfo/users > _______________________________________________ users mailing list [email protected] http://lists.xwiki.org/mailman/listinfo/users
