Hello We use solr: 4.10.3-cdh5.4.9   And periodically 'cretecollection' command timeouts with such stacktrase: 14:35:58 Error: A call to SolrCloud WEB APIs failed: HTTP/1.1 500 Internal Server Error 14:35:58 Server: nginx 14:35:58 Date: Tue, 21 Mar 2017 11:20:25 GMT 14:35:58 Content-Type: application/xml;charset=UTF-8 14:35:58 Transfer-Encoding: chunked 14:35:58 Connection: keep-alive 14:35:58 X-Market-Req-ID: 1490095045005/30f3544fc6f139218869df711c4e19f0 14:35:58 14:35:58 <?xml version="1.0" encoding="UTF-8"?> 14:35:58 14:35:58 <response> 14:35:58 14:35:58 <lst name="responseHeader"> 14:35:58 <int name="status"> 14:35:58 500</int> 14:35:58 <int name="QTime"> 14:35:58 180008</int> 14:35:58 </lst> 14:35:58 <lst name="error"> 14:35:58 <str name="msg"> 14:35:58 createcollection the collection time out:180s</str> 14:35:58 <str name="trace"> 14:35:58 org.apache.solr.common.SolrException: createcollection the collection time out:180s 14:35:58 at org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:364) 14:35:58 at org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:316) 14:35:58 at org.apache.solr.handler.admin.CollectionsHandler.handleCreateAction(CollectionsHandler.java:482) 14:35:58 at org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:153) 14:35:58 at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) 14:35:58 at org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:770) 14:35:58 at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:271) 14:35:58 at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:211) 14:35:58 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 14:35:58 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 14:35:58 at org.apache.solr.servlet.SolrHadoopAuthenticationFilter$2.doFilter(SolrHadoopAuthenticationFilter.java:353) 14:35:58 at org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:592) 14:35:58 at org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticationFilter.doFilter(DelegationTokenAuthenticationFilter.java:291) 14:35:58 at org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:555) 14:35:58 at org.apache.solr.servlet.SolrHadoopAuthenticationFilter.doFilter(SolrHadoopAuthenticationFilter.java:358) 14:35:58 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 14:35:58 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 14:35:58 at org.apache.solr.servlet.HostnameFilter.doFilter(HostnameFilter.java:86) 14:35:58 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 14:35:58 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 14:35:58 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 14:35:58 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 14:35:58 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 14:35:58 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 14:35:58 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 14:35:58 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) 14:35:58 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) 14:35:58 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:620) 14:35:58 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 14:35:58 at java.lang.Thread.run(Thread.java:745) 14:35:58 </str> 14:35:58 <int name="code"> 14:35:58 500</int> 14:35:58 </lst> 14:35:58 14:35:58 </response> Also, I have created bug in apache: https://issues.apache.org/jira/browse/SOLR-10334   ... View more