Hello, We face the same error in Solr every day.
When the this happens our search stops and we have to restart Tomcat (service tomcat7 restart). On logging page of Apache Solr we see the following thing: null:java.lang.RuntimeException: java.lang.OutOfMemoryError: Java heap space at org.apache.solr.servlet.SolrDispatchFilter.sendError(SolrDispatchFilter.java:793) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:434) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207) 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:170) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) 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:1041) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) Caused by: java.lang.OutOfMemoryError: Java heap space at org.apache.lucene.search.TopFieldCollector.add(TopFieldCollector.java:1188) at org.apache.lucene.search.TopFieldCollector$OneComparatorNonScoringCollector.collect(TopFieldCollector.java:87) at org.apache.lucene.search.Weight$DefaultBulkScorer.scoreAll(Weight.java:193) at org.apache.lucene.search.Weight$DefaultBulkScorer.score(Weight.java:163) at org.apache.lucene.search.BulkScorer.score(BulkScorer.java:35) at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:621) at org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:297) at org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:209) at org.apache.solr.search.SolrIndexSearcher.getDocListNC(SolrIndexSearcher.java:1619) at org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1433) at org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:514) at org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:485) at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:218) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1962) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:777) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:418) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207) 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:170) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) 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:1041) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:313) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) -- View this message in context: http://lucene.472066.n3.nabble.com/Apache-SOLR-Search-Errors-tp4294814.html Sent from the Solr - User mailing list archive at Nabble.com.