We have set up solr 4.3 with master/setup and are facing a couple of issues,
Index locking, the index on slave hangs at time and when we restart the core the core get's locked up. I have checked the logs and there are no OOM error or anything else other than the error given below,Caused by: org.apache.solr.common.SolrException: Index locked for write for core XXX at org.apache.solr.core.SolrCore.<init>(SolrCore.java:821) at org.apache.solr.core.SolrCore.<init>(SolrCore.java:618) at org.apache.solr.core.CoreContainer.createFromLocal(CoreContainer.java:949) at org.apache.solr.core.CoreContainer.create(CoreContainer.java:984) at org.apache.solr.core.CoreContainer$2.call(CoreContainer.java:597) at org.apache.solr.core.CoreContainer$2.call(CoreContainer.java:592) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) ... 1 more Caused by: org.apache.lucene.store.LockObtainFailedException: Index locked for write for core XX at org.apache.solr.core.SolrCore.initIndex(SolrCore.java:484) at org.apache.solr.core.SolrCore.<init>(SolrCore.java:745) ... 13 moreWhen we fire backup on Slave, the whole core hangs after a while and also replication stops. This was not happening with our earlier setup of solr3.6 Regards, Ayush