Intermittent multi core creation failure from a configset

[Hari Iyer <iy...@hotmail.com>]

Hi,
I have a batch process that indexes/re-indexes multiple cores from a database where each core data is processed by one thread. I am using solr 8.11.1.
I get the following SAX parse exception (see below) on the managed schema when creating any one of the cores.

At times, I get a “Unable to create core [xxx] Caused by: Premature end of file” error. Running the batch process  once again fixes the problem.
I create the core using the solrj admin API (the transient core size is 200):
                           CoreAdminRequest.Create create = new CoreAdminRequest.Create();
                           create.setCoreName(core);
                           create.setConfigSet(configSet);
                           create.setIsLoadOnStartup(false);
                           create.setIsTransient(true);
                             create.process(solrClient);

Is this a race condition/thread safety bug in solr?

Exception during parsing file: schema:org.xml.sax.SAXParseException; systemId: solrres:/managed-schema; lineNumber: 288; columnNumber: 41; XML document structures must start and end within the same entity.\n\tat java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.endEntity(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.endEntity(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLEntityManager.endEntity(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.scanLiteral(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLScanner.scanAttributeValue(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanAttribute(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)\n\tat java.xml/com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)\n\tat org.apache.solr.core.Config.<init>(Config.java:143)\n\tat org.apache.solr.core.Config.<init>(Config.java:90)\n\tat org.apache.solr.schema.IndexSchema.readSchema(IndexSchema.java:450)\n\tat org.apache.solr.schema.IndexSchema.<init>(IndexSchema.java:180)\n\tat org.apache.solr.schema.ManagedIndexSchema.<init>(ManagedIndexSchema.java:105)\n\tat org.apache.solr.schema.ManagedIndexSchemaFactory.create(ManagedIndexSchemaFactory.java:173)\n\tat org.apache.solr.schema.ManagedIndexSchemaFactory.create(ManagedIndexSchemaFactory.java:45)\n\tat org.apache.solr.schema.IndexSchemaFactory.buildIndexSchema(IndexSchemaFactory.java:75)\n\tat org.apache.solr.core.ConfigSetService.createIndexSchema(ConfigSetService.java:119)\n\tat org.apache.solr.core.ConfigSetService.getConfig(ConfigSetService.java:92)\n\tat org.apache.solr.core.CoreContainer.getConfigSet(CoreContainer.java:1236)\n\tat org.apache.solr.core.CoreContainer.createFromDescriptor(CoreContainer.java:1183)\n\tat org.apache.solr.core.CoreContainer.create(CoreContainer.java:1097)\n\tat org.apache.solr.handler.admin.CoreAdminOperation.lambda$static$0(CoreAdminOperation.java:92)\n\tat org.apache.solr.handler.admin.CoreAdminOperation.execute(CoreAdminOperation.java:360)\n\tat org.apache.solr.handler.admin.CoreAdminHandler$CallInfo.call(CoreAdminHandler.java:396)\n\tat org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:180)\n\tat org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)\n\tat org.apache.solr.servlet.HttpSolrCall.handleAdmin(HttpSolrCall.java:736)\n\tat org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:717)\n\tat org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:496)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:395)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:341)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)\n\tat org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)\n\tat org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)\n\tat org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:502)\n\tat org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)\n\tat org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)\n\tat org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)\n\tat org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)\n\tat org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)\n\tat org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)\n\tat java.base/java.lang.Thread.run(Unknown Source)\n"

Thanks,
Hari.