Hey all, We're using a Solr 4 core to handle our article data. When someone in our CMS publishes an article, we have a listener that indexes it straight to solr. We use the previously instantiated HttpSolrServer, build the solr document, add it with server.add(doc) .. then do a server.commit() right away. For some reason, sometimes this exception is thrown, which I suspect is related to a simultaneous data import done from another client which sometimes errors:
Feb 26, 2013 5:07:51 PM org.apache.solr.common.SolrException log SEVERE: null:org.apache.solr.common.SolrException: Error opening new searcher at org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1310) at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1422) at org.apache.solr.core.SolrCore.getSearcher(SolrCore.java:1200) at org.apache.solr.update.DirectUpdateHandler2.commit(DirectUpdateHandler2.java:560) at org.apache.solr.update.processor.RunUpdateProcessor.processCommit(RunUpdateProcessorFactory.java:87) at org.apache.solr.update.processor.UpdateRequestProcessor.processCommit(UpdateRequestProcessor.java:64) at org.apache.solr.update.processor.DistributedUpdateProcessor.processCommit(DistributedUpdateProcessor.java:1007) at org.apache.solr.update.processor.LogUpdateProcessor.processCommit(LogUpdateProcessorFactory.java:157) at org.apache.solr.handler.RequestHandlerUtils.handleCommit(RequestHandlerUtils.java:69) at org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:68) at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:129) at org.apache.solr.core.SolrCore.execute(SolrCore.java:1699) at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:455) at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:276) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:679) Caused by: org.apache.lucene.store.AlreadyClosedException: this IndexWriter is closed at org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:550) at org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:563) at org.apache.lucene.index.IndexWriter.nrtIsCurrent(IndexWriter.java:4196) at org.apache.lucene.index.StandardDirectoryReader.doOpenFromWriter(StandardDirectoryReader.java:266) at org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:245) at org.apache.lucene.index.StandardDirectoryReader.doOpenIfChanged(StandardDirectoryReader.java:235) at org.apache.lucene.index.DirectoryReader.openIfChanged(DirectoryReader.java:169) at org.apache.solr.core.SolrCore.openNewSearcher(SolrCore.java:1256) ... 28 more I'm not sure if the error is causing the IndexWriter to close, and why an IndexWriter would be shared across clients, but usually, I can get around this by basically creating a new HttpSolrServer and trying again. But it doesn't always work, perhaps due to frequency… I don't like the idea of an "infinite loop of creating connections until it works". I'd rather understand what's going on. What's the proper way to fix this? I see I can add a doc with a commitWithMs of "0" and maybe this couples the add tightly with the commit and would prevent interference. But am I totally off the mark here as to the problem? Suggestions? Posted this on java-user before, but then realized solr-user existed, so please forgive the redundancy… Thanks for reading! - Scott
