Hello, I am trying to setup 2 node Solr cloud 6 cluster with ZK 3.4.8 and used the install service to setup solr.
After launching Solr Admin Panel on server1, it looses connections in few seconds and then comes back and other node server2 is marked as Down in cloud graph. After few seconds its loosing the connection and comes back. Any idea what may be going wrong? Has anyone used Solr 6 with ZK 3.4.8. Have never seen this error before with solr 5.x with ZK 3.4.6. Below log from server1 & server2. The ZK has 3 nodes with chroot enabled. Thanks, Susheel server1/solr.log ==== 2016-05-04 19:20:53.804 INFO (qtp1989972246-14) [ ] o.a.s.c.c.ZkStateReader path=[/collections/collection1] [configName]=[collection1] specified config exists in ZooKeeper 2016-05-04 19:20:53.806 INFO (qtp1989972246-14) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections params={action=CLUSTERSTATUS&wt=json&_=1462389588125} status=0 QTime=25 2016-05-04 19:20:53.859 INFO (qtp1989972246-19) [ ] o.a.s.h.a.CollectionsHandler Invoked Collection Action :list with params action=LIST&wt=json&_=1462389588125 and sendToOCPQueue=true 2016-05-04 19:20:53.861 INFO (qtp1989972246-19) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections params={action=LIST&wt=json&_=1462389588125} status=0 QTime=2 2016-05-04 19:20:57.520 INFO (qtp1989972246-13) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/cores params={indexInfo=false&wt=json&_=1462389588124} status=0 QTime=0 2016-05-04 19:20:57.546 INFO (qtp1989972246-15) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/info/system params={wt=json&_=1462389588126} status=0 QTime=25 2016-05-04 19:20:57.610 INFO (qtp1989972246-13) [ ] o.a.s.h.a.CollectionsHandler Invoked Collection Action :list with params action=LIST&wt=json&_=1462389588125 and sendToOCPQueue=true 2016-05-04 19:20:57.613 INFO (qtp1989972246-13) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections params={action=LIST&wt=json&_=1462389588125} status=0 QTime=3 2016-05-04 19:21:29.139 INFO (qtp1989972246-5980) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.139 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.139 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.141 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.141 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.142 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.142 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.142 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.140 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.140 INFO (qtp1989972246-5980) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.143 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.144 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.144 INFO (qtp1989972246-5980) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.144 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:20:53.806 INFO (qtp1989972246-14) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections params={action=CLUSTERSTATUS&wt=json&_=1462389588125} status=0 QTime=25 2016-05-04 19:20:53.859 INFO (qtp1989972246-19) [ ] o.a.s.h.a.CollectionsHandler Invoked Collection Action :list with params action=LIST&wt=json&_=1462389588125 and sendToOCPQueue=true 2016-05-04 19:20:53.861 INFO (qtp1989972246-19) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections params={action=LIST&wt=json&_=1462389588125} status=0 QTime=2 2016-05-04 19:20:57.520 INFO (qtp1989972246-13) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/cores params={indexInfo=false&wt=json&_=1462389588124} status=0 QTime=0 2016-05-04 19:20:57.546 INFO (qtp1989972246-15) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/info/system params={wt=json&_=1462389588126} status=0 QTime=25 2016-05-04 19:20:57.610 INFO (qtp1989972246-13) [ ] o.a.s.h.a.CollectionsHandler Invoked Collection Action :list with params action=LIST&wt=json&_=1462389588125 and sendToOCPQueue=true 2016-05-04 19:20:57.613 INFO (qtp1989972246-13) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections params={action=LIST&wt=json&_=1462389588125} status=0 QTime=3 2016-05-04 19:21:29.139 INFO (qtp1989972246-5980) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.139 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.139 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.141 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.141 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.142 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.142 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.142 INFO (qtp1989972246-5984) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.140 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.140 INFO (qtp1989972246-5980) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.143 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.144 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.144 INFO (qtp1989972246-5980) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.144 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files 2016-05-04 19:21:29.145 INFO (qtp1989972246-5983) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.146 INFO (qtp1989972246-5985) [ ] o.a.h.i.c.DefaultHttpClient I/O exception (java.net.SocketException) caught when connecting to {}->http://server2:8983: Too many open files … … 2016-05-04 19:21:29.150 INFO (qtp1989972246-5980) [ ] o.a.h.i.c.DefaultHttpClient Retrying connect to {}->http://server2:8983 2016-05-04 19:21:29.151 ERROR (qtp1989972246-5985) [ ] o.a.s.s.HttpSolrCall null:org.apache.solr.common.SolrException: Error trying to proxy request for url: http://server2:8983/solr/collection1/admin/luke at org.apache.solr.servlet.HttpSolrCall.remoteQuery(HttpSolrCall.java:588) at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:444) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:229) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:184) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1668) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:581) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1160) server2/solr.log ====== 016-05-04 18:14:32.936 INFO (main) [ ] o.e.j.s.ServerConnector Started ServerConnector@4c22110e{HTTP/1.1,[http/1.1]}{0.0.0.0:8983} 2016-05-04 18:14:32.936 INFO (main) [ ] o.e.j.s.Server Started @3850ms 2016-05-04 19:20:20.243 INFO (qtp1989972246-18) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/cores params={indexInfo=false&wt=json&_=1462389620001} status=0 QTime=34 2016-05-04 19:20:20.254 INFO (qtp1989972246-15) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/zookeeper params={path=/live_nodes&wt=json&_=1462389620113} status=0 QTime=42 2016-05-04 19:20:20.264 INFO (qtp1989972246-20) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/info/system params={wt=json&_=1462389620002} status=0 QTime=50 2016-05-04 19:20:20.321 INFO (qtp1989972246-19) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/zookeeper params={path=/clusterstate.json&view=graph&detail=true&wt=json&_=1462389620113} status=0 QTime=6 2016-05-04 19:20:20.360 INFO (qtp1989972246-21) [ ] o.a.s.h.a.CollectionsHandler Invoked Collection Action :list with params action=LIST&wt=json&_=1462389620002 and sendToOCPQueue=true 2016-05-04 19:20:20.362 INFO (qtp1989972246-21) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections params={action=LIST&wt=json&_=1462389620002} status=0 QTime=19 2016-05-04 19:34:35.760 WARN (qtp1989972246-16-acceptor-0@42e5f722-ServerConnector @4c22110e{HTTP/1.1,[http/1.1]}{0.0.0.0:8983}) [ ] o.e.j.s.ServerConnector java.io.IOException: Too many open files at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422) at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250) at org.eclipse.jetty.server.ServerConnector.accept(ServerConnector.java:382) at org.eclipse.jetty.server.AbstractConnector$Acceptor.run(AbstractConnector.java:593) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572) at java.lang.Thread.run(Thread.java:745) 2016-05-04 19:38:09.442 INFO (qtp1989972246-5289) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/cores params={indexInfo=false&wt=json&_=1462389620001} status=0 QTime=0 2016-05-04 19:38:09.496 INFO (qtp1989972246-1224) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/info/logging params={wt=json&_=1462390689357&since=0} status=0 QTime=4 2016-05-04 19:38:09.587 INFO (qtp1989972246-5765) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/info/system params={wt=json&_=1462389620002} status=0 QTime=99 2016-05-04 19:38:09.656 INFO (qtp1989972246-4352) [ ] o.a.s.h.a.CollectionsHandler Invoked Collection Action :list with params action=LIST&wt=json&_=1462389620002 and sendToOCPQueue=true 2016-05-04 19:38:09.658 INFO (qtp1989972246-4352) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/collections params={action=LIST&wt=json&_=1462389620002} status=0 QTime=2 2016-05-04 19:38:19.442 INFO (qtp1989972246-4324) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/info/logging params={wt=json&_=1462390689357&since=0} status=0 QTime=0