Hi Joel, This is the details which I get form the logs.
java.lang.RuntimeException: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.io.IOException: java.util.concurrent.ExecutionException: java.io.IOException: --> http://localhost:8984/solr/email/: An exception has occurred on the server, refer to server log for details. at org.apache.solr.client.solrj.io.graph.GatherNodesStream.read(GatherNodesStream.java:600) at org.apache.solr.client.solrj.io.stream.ExceptionStream.read(ExceptionStream.java:68) at org.apache.solr.handler.StreamHandler$TimerStream.read(StreamHandler.java:479) at org.apache.solr.client.solrj.io.stream.TupleStream.lambda$writeMap$0(TupleStream.java:67) at org.apache.solr.response.JSONWriter.writeIterator(JSONResponseWriter.java:523) at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:175) at org.apache.solr.response.JSONWriter$2.put(JSONResponseWriter.java:559) at org.apache.solr.client.solrj.io.stream.TupleStream.writeMap(TupleStream.java:64) at org.apache.solr.response.JSONWriter.writeMap(JSONResponseWriter.java:547) at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:193) at org.apache.solr.response.JSONWriter.writeNamedListAsMapWithDups(JSONResponseWriter.java:209) at org.apache.solr.response.JSONWriter.writeNamedList(JSONResponseWriter.java:325) at org.apache.solr.response.JSONWriter.writeResponse(JSONResponseWriter.java:120) at org.apache.solr.response.JSONResponseWriter.write(JSONResponseWriter.java:71) at org.apache.solr.response.QueryResponseWriterUtil.writeQueryResponse(QueryResponseWriterUtil.java:65) at org.apache.solr.servlet.HttpSolrCall.writeResponse(HttpSolrCall.java:732) at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:473) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:345) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:296) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1691) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582) 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:1180) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:213) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) at org.eclipse.jetty.server.Server.handle(Server.java:534) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:320) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95) at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93) at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303) at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148) at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) at java.lang.Thread.run(Thread.java:745) Caused by: java.util.concurrent.ExecutionException: java.lang.RuntimeException: java.io.IOException: java.util.concurrent.ExecutionException: java.io.IOException: --> http://localhost:8984/solr/email/: An exception has occurred on the server, refer to server log for details. at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.solr.client.solrj.io.graph.GatherNodesStream.read(GatherNodesStream.java:572) ... 43 more Caused by: java.lang.RuntimeException: java.io.IOException: java.util.concurrent.ExecutionException: java.io.IOException: --> http://localhost.:8984/solr/email/: An exception has occurred on the server, refer to server log for details. at org.apache.solr.client.solrj.io.graph.GatherNodesStream$JoinRunner.call(GatherNodesStream.java:487) at org.apache.solr.client.solrj.io.graph.GatherNodesStream$JoinRunner.call(GatherNodesStream.java:406) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:229) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ... 1 more Caused by: java.io.IOException: java.util.concurrent.ExecutionException: java.io.IOException: --> http://localhost:8984/solr/email/: An exception has occurred on the server, refer to server log for details. at org.apache.solr.client.solrj.io.stream.CloudSolrStream.openStreams(CloudSolrStream.java:451) at org.apache.solr.client.solrj.io.stream.CloudSolrStream.open(CloudSolrStream.java:308) at org.apache.solr.client.solrj.io.stream.PushBackStream.open(PushBackStream.java:70) at org.apache.solr.client.solrj.io.stream.ReducerStream.open(ReducerStream.java:199) at org.apache.solr.client.solrj.io.stream.UniqueStream.open(UniqueStream.java:150) at org.apache.solr.client.solrj.io.graph.GatherNodesStream$JoinRunner.call(GatherNodesStream.java:476) ... 6 more Caused by: java.util.concurrent.ExecutionException: java.io.IOException: --> http://localhost:8984/solr/email/: An exception has occurred on the server, refer to server log for details. at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.solr.client.solrj.io.stream.CloudSolrStream.openStreams(CloudSolrStream.java:445) ... 11 more Caused by: java.io.IOException: --> http://localhost:8984/solr/email/: An exception has occurred on the server, refer to server log for details. at org.apache.solr.client.solrj.io.stream.SolrStream.read(SolrStream.java:238) at org.apache.solr.client.solrj.io.stream.CloudSolrStream$TupleWrapper.next(CloudSolrStream.java:541) at org.apache.solr.client.solrj.io.stream.CloudSolrStream$StreamOpener.call(CloudSolrStream.java:564) at org.apache.solr.client.solrj.io.stream.CloudSolrStream$StreamOpener.call(CloudSolrStream.java:551) ... 5 more Caused by: org.noggit.JSONParser$ParseException: JSON Parse Error: char=<,position=0 BEFORE='<' AFTER='?xml version="1.0" encoding="UTF-8"?> <' at org.noggit.JSONParser.err(JSONParser.java:356) at org.noggit.JSONParser.handleNonDoubleQuoteString(JSONParser.java:712) at org.noggit.JSONParser.next(JSONParser.java:886) at org.noggit.JSONParser.nextEvent(JSONParser.java:930) at org.apache.solr.client.solrj.io.stream.JSONTupleStream.expect(JSONTupleStream.java:97) at org.apache.solr.client.solrj.io.stream.JSONTupleStream.advanceToDocs(JSONTupleStream.java:179) at org.apache.solr.client.solrj.io.stream.JSONTupleStream.next(JSONTupleStream.java:77) at org.apache.solr.client.solrj.io.stream.SolrStream.read(SolrStream.java:207) ... 8 more Regards, Edwin On 14 March 2017 at 00:26, Joel Bernstein <joels...@gmail.com> wrote: > Syntax looks ok. The logs should have a stack trace. > > One thing it could be is that gatherNodes will only work on single value > fields currently. > > Joel Bernstein > http://joelsolr.blogspot.com/ > > On Mon, Mar 13, 2017 at 1:59 AM, Zheng Lin Edwin Yeo <edwinye...@gmail.com > > > wrote: > > > Hi, > > > > I am getting this error when I tried to run a query for Graph Traversal > > using Streaming Expressions: > > > > { > > "result-set":{ > > "docs":[{ > > "EXCEPTION":"java.util.concurrent.ExecutionException: > > java.lang.RuntimeException: java.io.IOException: > > java.util.concurrent.ExecutionException: java.io.IOException: --> > > http://localhost:8983/solr/email/: An exception has occurred on the > > server, > > refer to server log for details.", > > "EOF":true, > > "RESPONSE_TIME":11}]}} > > > > > > Below is my query: > > > > http://locahost:8983/solr/email/stream?expr=gatherNodes(email, > > walk="ed...@mail.com->from", > > gather="to")&indent=true > > > > What could be the reason? > > > > I'm using Solr 6.4.1 at the moment. > > > > Regards, > > Edwin > > >
