Hi, We are facing NPE while using distributed search (Solr version 4.7.2) (using *shards* parameter in solr query)
Exception Trace: ERROR - 2016-02-17 16:44:26.616; org.apache.solr.common.SolrException; null:java.lang.NullPointerException at org.apache.solr.response.XMLWriter.writeSolrDocument(XMLWriter.java:190) at org.apache.solr.response.TextResponseWriter.writeSolrDocumentList(TextResponseWriter.java:222) at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:184) at org.apache.solr.response.XMLWriter.writeNamedList(XMLWriter.java:227) at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:188) at org.apache.solr.response.XMLWriter.writeArray(XMLWriter.java:273) at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:190) at org.apache.solr.response.XMLWriter.writeNamedList(XMLWriter.java:227) at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:188) at org.apache.solr.response.XMLWriter.writeNamedList(XMLWriter.java:227) at org.apache.solr.response.TextResponseWriter.writeVal(TextResponseWriter.java:188) at org.apache.solr.response.XMLWriter.writeResponse(XMLWriter.java:111) at org.apache.solr.response.XMLResponseWriter.write(XMLResponseWriter.java:40) at org.apache.solr.servlet.SolrDispatchFilter.writeResponse(SolrDispatchFilter.java:756) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:428) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:205) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) Can somebody help us in finding the root cause of this exception? FYI, we have documents split across 8 shards (num docs ~ 20 million) with index size ~ 4 GB per node. We are using c3.2xlarge amazon ec2 machines with solr running in apache tomcat (memory config 8 to 10 gb). Request count ~ 200/sec. Thanks, Lokesh
