Shawn's link gives you a fairly concise version, there's a longer treatment (if you can stay awake) here: http://searchhub.org/2013/08/23/understanding-transaction-logs-softcommit-and-commit-in-sorlcloud/
FWIW, Erick On Thu, Aug 29, 2013 at 6:21 PM, Cat Bieber <cbie...@techtarget.com> wrote: > Thanks Shawn. We'll give an upgrade a try and see if that helps. > -Cat > > > On 08/29/2013 04:32 PM, Shawn Heisey wrote: > >> 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 ... >>> >>> >> 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. >> >> >> >
