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
