I am also facing this issue recently. Any solution to fix this issue? I have almost 3000+ core created and adding some more. Please suggest if there is restriction on the core numbers and shard and collection.
Here is trace: Jun 23, 2014 9:01:45 AM org.apache.solr.common.SolrException log SEVERE: org.apache.solr.common.SolrException: Error CREATEing SolrCore 'test_core_3005': Could not get shard_id for core: test_core_3005 at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:521) at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:142) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129) at org.apache.solr.servlet.SolrDispatchFilter.handleAdminRequest(SolrDispatchFilter.java:372) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:181) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405) at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211) at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139) at org.mortbay.jetty.Server.handle(Server.java:285) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:821) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:368) at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442) Caused by: org.apache.solr.common.SolrException: Could not get shard_id for core: core_t3nant778_com at org.apache.solr.cloud.ZkController.doGetShardIdProcess(ZkController.java:995) at org.apache.solr.cloud.ZkController.preRegister(ZkController.java:1053) at org.apache.solr.core.CoreContainer.register(CoreContainer.java:662) at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:517) ... 21 more -- View this message in context: http://lucene.472066.n3.nabble.com/Error-creating-collection-tp4057859p4143444.html Sent from the Solr - User mailing list archive at Nabble.com.