/select handler stall

State:WAITING
Priority:5

sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
java.util.concurrent.ExecutorCompletionService.take(ExecutorCompletionService.java:193)
org.apache.solr.handler.component.HttpShardHandler.take(HttpShardHandler.java:204)
org.apache.solr.handler.component.HttpShardHandler.takeCompletedOrError(HttpShardHandler.java:197)
org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:289)
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
org.apache.solr.core.SolrCore.execute(SolrCore.java:1820)
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:656)
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:359)
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:155)
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1486)
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:503)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:564)
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1096)
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:432)
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1030)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:201)
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109)
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
org.eclipse.jetty.server.Server.handle(Server.java:445)
org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:268)
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:229)
org.eclipse.jetty.io.AbstractConnection$ReadCallback.run(AbstractConnection.java:358)
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:601)
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:532)
java.lang.Thread.run(Thread.java:724)