Hello, I am using solr 6.0.0 in SolCloud mode with 3 nodes, one zookeeper and 3 shard and 2 replica per collection.
Getting below error for some insert/update when trying to insert documents to Solr. And it has been observed that few shard are in either recovery or fail recovery state. (Atleast one shard is up) org.apache.solr.common.SolrException: Could not load collection from ZK: MY_COLLECTION at org.apache.solr.common.cloud.ZkStateReader.getCollectionLive(ZkStateReader.java:969) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.common.cloud.ZkStateReader$LazyCollectionRef.get(ZkStateReader.java:519) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.common.cloud.ClusterState.getCollectionOrNull(ClusterState.java:189) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.common.cloud.ClusterState.hasCollection(ClusterState.java:119) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.client.solrj.impl.CloudSolrClient.getCollectionNames(CloudSolrClient.java:1111) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.client.solrj.impl.CloudSolrClient.requestWithRetryOnStaleState(CloudSolrClient.java:833) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.client.solrj.impl.CloudSolrClient.request(CloudSolrClient.java:806) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.client.solrj.SolrRequest.process(SolrRequest.java:149) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:106) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.client.solrj.SolrClient.add(SolrClient.java:71) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_60] at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_60] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_60] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_60] at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60] Caused by: org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session expired for /collections/ MY_COLLECTION /state.json at org.apache.zookeeper.KeeperException.create(KeeperException.java:127) ~[zookeeper-3.4.6.jar:3.4.6-1569965] at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) ~[zookeeper-3.4.6.jar:3.4.6-1569965] at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1155) ~[zookeeper-3.4.6.jar:3.4.6-1569965] at org.apache.solr.common.cloud.SolrZkClient$7.execute(SolrZkClient.java:348) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.common.cloud.SolrZkClient$7.execute(SolrZkClient.java:345) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.common.cloud.ZkCmdExecutor.retryOperation(ZkCmdExecutor.java:60) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.common.cloud.SolrZkClient.getData(SolrZkClient.java:345) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.common.cloud.ZkStateReader.fetchCollectionState(ZkStateReader.java:980) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] at org.apache.solr.common.cloud.ZkStateReader.getCollectionLive(ZkStateReader.java:967) ~[solr-solrj-6.0.0.jar:6.0.0 48c80f91b8e5cd9b3a9b48e6184bd53e7619e7e3 - nknize - 2016-04-01 14:41:50] ... 16 more Regards, Roshan ________________________________ The information in this email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this email by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful.