On 8/29/2013 2:16 PM, Cat Bieber wrote:
We're running solr 4.2.0 and recently converted to SolrCloud. We've got
16 cores, each with 1 shard. 3 zookeeper instances, 4 replicas of each
core. We're suddenly having trouble with very slow tomcat restarts
(15-45 minutes) and even when we can get a few replicas up, we aren't
seeing a leader for many of our cores. I tried issuing a reload command
through the cores admin, but it fails because there is no leader. Is
there any way to cause an election? Restarting tomcat on individual
servers in the cluster doesn't seem to help. We do have some cores that
are serving request properly and would prefer not to shut down the whole
cluster if possible -- this is a production system.
Solr 4.2.0 had a number of bugs. They were severe enough that a 4.2.1
version was quickly released afterwards. It should be possible to
upgrade without changing your config. You should probably upgrade to
4.4, but that would be less straightforward.
http://lucene.apache.org/solr/4_2_1/changes/Changes.html#4.2.1.bug_fixes
The very slow restarts are probably being caused by the problem
described at the URL below. The solution is also described here:
http://wiki.apache.org/solr/SolrPerformanceProblems#Slow_startup
Thanks,
Shawn
