SimonBin opened a new issue, #1324: URL: https://github.com/apache/jena/issues/1324
The cause seems to be https://github.com/javacc/javacc/issues/72 We encountered this issue when a SPARQL SERVICE clause was sending a large-ish Geometry literal of USA to Fuseki. It stalls forever trying to parse the query. Ideally, the buffer would expand exponentially or there is an alternative PR linked in the javacc issue. Currently, the parsing buffer is apparently grown in steps of 2KiB <details><summary>jstack:</summary> ``` "qtp771666241-136" #136 prio=5 os_prio=0 cpu=13385,35ms elapsed=5538,68s tid=0x00007fa188007800 nid=0x15730d runnable [0x00007fa1341f9000] java.lang.Thread.State: RUNNABLE at org.apache.jena.sparql.lang.arq.SimpleCharStream.ExpandBuff(SimpleCharStream.java:42) at org.apache.jena.sparql.lang.arq.SimpleCharStream.FillBuff(SimpleCharStream.java:103) at org.apache.jena.sparql.lang.arq.SimpleCharStream.readChar(SimpleCharStream.java:197) at org.apache.jena.sparql.lang.arq.ARQParserTokenManager.jjMoveNfa_0(ARQParserTokenManager.java:4369) at org.apache.jena.sparql.lang.arq.ARQParserTokenManager.jjMoveStringLiteralDfa0_0(ARQParserTokenManager.java:211) at org.apache.jena.sparql.lang.arq.ARQParserTokenManager.getNextToken(ARQParserTokenManager.java:4793) at org.apache.jena.sparql.lang.arq.ARQParser.jj_ntk_f(ARQParser.java:8162) at org.apache.jena.sparql.lang.arq.ARQParser.PathElt(ARQParser.java:3603) at org.apache.jena.sparql.lang.arq.ARQParser.PathEltOrInverse(ARQParser.java:3635) at org.apache.jena.sparql.lang.arq.ARQParser.PathSequence(ARQParser.java:3565) at org.apache.jena.sparql.lang.arq.ARQParser.PathAlternative(ARQParser.java:3544) at org.apache.jena.sparql.lang.arq.ARQParser.Path(ARQParser.java:3538) at org.apache.jena.sparql.lang.arq.ARQParser.VerbPath(ARQParser.java:3493) at org.apache.jena.sparql.lang.arq.ARQParser.PropertyListPathNotEmpty(ARQParser.java:3418) at org.apache.jena.sparql.lang.arq.ARQParser.TriplesSameSubjectPath(ARQParser.java:3365) at org.apache.jena.sparql.lang.arq.ARQParser.TriplesBlock(ARQParser.java:2512) at org.apache.jena.sparql.lang.arq.ARQParser.GroupGraphPatternSub(ARQParser.java:2425) at org.apache.jena.sparql.lang.arq.ARQParser.GroupGraphPattern(ARQParser.java:2387) at org.apache.jena.sparql.lang.arq.ARQParser.WhereClause(ARQParser.java:858) at org.apache.jena.sparql.lang.arq.ARQParser.SelectQuery(ARQParser.java:137) at org.apache.jena.sparql.lang.arq.ARQParser.Query(ARQParser.java:31) at org.apache.jena.sparql.lang.arq.ARQParser.QueryUnit(ARQParser.java:22) at org.apache.jena.sparql.lang.ParserARQ$1.exec(ParserARQ.java:48) at org.apache.jena.sparql.lang.ParserARQ.perform(ParserARQ.java:95) at org.apache.jena.sparql.lang.ParserARQ.parse$(ParserARQ.java:52) at org.apache.jena.sparql.lang.SPARQLParser.parse(SPARQLParser.java:33) at org.apache.jena.query.QueryFactory.parse(QueryFactory.java:144) at org.apache.jena.query.QueryFactory.create(QueryFactory.java:83) at org.apache.jena.fuseki.servlets.SPARQLQueryProcessor.execute(SPARQLQueryProcessor.java:251) at org.apache.jena.fuseki.servlets.SPARQLQueryProcessor.executeBody(SPARQLQueryProcessor.java:234) at org.apache.jena.fuseki.servlets.SPARQLQueryProcessor.execute(SPARQLQueryProcessor.java:213) at org.apache.jena.fuseki.servlets.ActionService.executeLifecycle(ActionService.java:58) at org.apache.jena.fuseki.servlets.SPARQLQueryProcessor.execPost(SPARQLQueryProcessor.java:83) at org.apache.jena.fuseki.servlets.ActionProcessor.process(ActionProcessor.java:34) at org.apache.jena.fuseki.servlets.ActionBase.process(ActionBase.java:55) at org.apache.jena.fuseki.servlets.ActionExecLib.execActionSub(ActionExecLib.java:125) at org.apache.jena.fuseki.servlets.ActionExecLib.execAction(ActionExecLib.java:99) at org.apache.jena.fuseki.server.Dispatcher.dispatchAction(Dispatcher.java:164) at org.apache.jena.fuseki.server.Dispatcher.process(Dispatcher.java:156) at org.apache.jena.fuseki.server.Dispatcher.dispatch(Dispatcher.java:83) at org.apache.jena.fuseki.servlets.FusekiFilter.doFilter(FusekiFilter.java:48) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1600) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:450) at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:387) at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1600) at org.apache.jena.fuseki.servlets.CrossOriginFilter.handle(CrossOriginFilter.java:284) at org.apache.jena.fuseki.servlets.CrossOriginFilter.doFilter(CrossOriginFilter.java:247) at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:210) at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1600) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:506) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:578) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1571) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1378) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:463) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1544) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1300) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129) at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:717) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122) at org.eclipse.jetty.server.Server.handle(Server.java:562) at org.eclipse.jetty.server.HttpChannel.lambda$handle$0(HttpChannel.java:505) at org.eclipse.jetty.server.HttpChannel$$Lambda$636/0x000000084084d040.dispatch(Unknown Source) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:762) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:497) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:282) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:319) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100) at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:412) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:381) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:268) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.lambda$new$0(AdaptiveExecutionStrategy.java:138) at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy$$Lambda$624/0x0000000840830c40.run(Unknown Source) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:407) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:894) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1038) at java.lang.Thread.run([email protected]/Thread.java:829) ``` </details> query is something simple as ``` { ?c ^<http://www.opengis.net/ont/geosparql#sfContains> "<?xml version="1.0" encoding="UTF-8"?><gml:MultiSurface xmlns:gml="http://www.opengis.net/ont/gml"; gml:id="g2015_2014_0.104.wkb_geometry" srsDimension="2" srsName="urn:ogc:def:crs:EPSG::3857"><gml:surfaceMember><gml:Polygon gml:id="g2015_2014_0.104.wkb_geometry.1"><gml:exterior><gml:LinearRing><gml:posList>HUGE POS LIST</gml:posList></gml:LinearRing></gml:exterior></gml:Polygon></gml:surfaceMember></gml:MultiSurface>"^^<http://www.opengis.net/ont/geosparql#gmlLiteral> } ``` automatically injected from a service clause -- This is an automated message from the Apache Git Service. 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