On 3/21/2016 6:49 PM, Aswath Srinivasan (TMS) wrote: >>> Thank you for the responses. Collection crashes as in, I'm unable to open >>> the core tab in Solr console. Search is not returning. None of the page >>> opens in solr admin dashboard. >>> >>> I do understand how and why this issue occurs and I'm going to do all it >>> takes to avoid this issue. However, on an event of an accidental frequent >>> hard commit close to each other which throws this WARN then - I'm just >>> trying to figure out a way to make my collection throw results without >>> having to delete and re-create the collection or delete the data folder. >>> >>> Again, I know how to avoid this issue but if it still happens then what can >>> be done to avoid a complete reindexing.
If you're not actually hitting OutOfMemoryError, then my best guess about what's happening is that you are running right at the edge of the available Java heap memory, so your JVM is constantly running full garbage collections to free up enough memory for normal operation. In this situation, Solr is actually still running, but is spending most of its time paused for garbage collection. https://wiki.apache.org/solr/SolrPerformanceProblems#GC_pause_problems The first part of the "GC pause problems" section on the above wiki page talks about very large heaps, but there is a paragraph just before "Tools and Garbage Collection" that talks about heaps that are a little bit too small. If I'm right about this, you're going to need to increase your java heap size. Exactly how to do this will depend on what version of Solr you're running, how you installed it, and how you start it. For 5.x versions using the included scripts, you can use the "-m" option on the "bin/solr" command when you start Solr manually, or you can edit the solr.in.sh file (usually found in /etc/default or /var/solr) if you used the service installer script on a UNIX/Linux platform. The default heap size in 5.x scripts is 512MB, which is VERY small. For earlier versions, there's too many install/start options available. There were no installation scripts included with Solr itself, so I won't know anything about the setup. If I'm wrong about what's happening, then we'll need a lot more details about your server and your Solr setup. Thanks, Shawn
