[ https://issues.apache.org/jira/browse/VELOCITY-562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12522139 ]
Will Glass-Husain commented on VELOCITY-562: -------------------------------------------- I'm thinking... memory constraint? (i.e. garbage collection pause). > Hanging in jj_scan_token (while holding lock for getResouce) > ------------------------------------------------------------ > > Key: VELOCITY-562 > URL: https://issues.apache.org/jira/browse/VELOCITY-562 > Project: Velocity > Issue Type: Bug > Affects Versions: 1.5 > Environment: Integreated in Tomcat on Ubuntu Linux > JDK version: 1.5.0_08-b03 > Reporter: nhb > > We are having trouble with deadlocks in Velocity after updating from 1.3 to > 1.5 > The thread holding the lock allways it at > org.apache.velocity.runtime.parser.Parser.jj_scan_token(Parser.java:3259) > although the frames below that differ between restarts. It is not possible to > use Eclipse to step over that line. It simply hangs. > 3259 is this line: "if (jj_la == 0 && jj_scanpos == jj_lastpos) throw jj_ls;" > Here is an example stacktrace: > Full thread dump Java HotSpot(TM) Client VM (1.5.0_08-b03 mixed mode): > "DataExchange" daemon prio=1 tid=0x08b2df10 nid=0x2824 waiting for monitor > entry [0x8545a000..0x8545b130] > at > org.apache.velocity.runtime.resource.ResourceManagerImpl.getResource(ResourceManagerImpl.java:287) > - waiting to lock <0x91140270> (a > org.apache.velocity.runtime.resource.ResourceManagerImpl) > at > org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1102) > at > org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1077) > at > org.apache.velocity.runtime.RuntimeSingleton.getTemplate(RuntimeSingleton.java:303) > at org.apache.velocity.app.Velocity.getTemplate(Velocity.java:503) > at > de.his.servlet.util.ServletUtil.parseWithVelocity(ServletUtil.java:735) > [...] > "http-8080-Processor23" daemon prio=1 tid=0x08220cc8 nid=0x2803 runnable > [0x858e2000..0x858e3db0] > at > org.apache.velocity.runtime.parser.Parser.jj_scan_token(Parser.java:3259) > at org.apache.velocity.runtime.parser.Parser.jj_3R_56(Parser.java:3089) > at org.apache.velocity.runtime.parser.Parser.jj_3R_29(Parser.java:2696) > at org.apache.velocity.runtime.parser.Parser.jj_3_8(Parser.java:2530) > at org.apache.velocity.runtime.parser.Parser.jj_3_7(Parser.java:2574) > at org.apache.velocity.runtime.parser.Parser.jj_2_7(Parser.java:2483) > at org.apache.velocity.runtime.parser.Parser.Reference(Parser.java:1240) > at > org.apache.velocity.runtime.parser.Parser.PrimaryExpression(Parser.java:2391) > at > org.apache.velocity.runtime.parser.Parser.UnaryExpression(Parser.java:2366) > at > org.apache.velocity.runtime.parser.Parser.MultiplicativeExpression(Parser.java:2215) > at > org.apache.velocity.runtime.parser.Parser.AdditiveExpression(Parser.java:2139) > at > org.apache.velocity.runtime.parser.Parser.RelationalExpression(Parser.java:2007) > at > org.apache.velocity.runtime.parser.Parser.EqualityExpression(Parser.java:1931) > at > org.apache.velocity.runtime.parser.Parser.ConditionalAndExpression(Parser.java:1891) > at > org.apache.velocity.runtime.parser.Parser.ConditionalOrExpression(Parser.java:1851) > at > org.apache.velocity.runtime.parser.Parser.Expression(Parser.java:1798) > at > org.apache.velocity.runtime.parser.Parser.SetDirective(Parser.java:1730) > at org.apache.velocity.runtime.parser.Parser.Statement(Parser.java:310) > at > org.apache.velocity.runtime.parser.Parser.IfStatement(Parser.java:1453) > at org.apache.velocity.runtime.parser.Parser.Statement(Parser.java:293) > at > org.apache.velocity.runtime.parser.Parser.IfStatement(Parser.java:1453) > at org.apache.velocity.runtime.parser.Parser.Statement(Parser.java:293) > at > org.apache.velocity.runtime.parser.Parser.IfStatement(Parser.java:1453) > at org.apache.velocity.runtime.parser.Parser.Statement(Parser.java:293) > at > org.apache.velocity.runtime.parser.Parser.IfStatement(Parser.java:1453) > at org.apache.velocity.runtime.parser.Parser.Statement(Parser.java:293) > at > org.apache.velocity.runtime.parser.Parser.ElseStatement(Parser.java:1564) > at > org.apache.velocity.runtime.parser.Parser.IfStatement(Parser.java:1495) > at org.apache.velocity.runtime.parser.Parser.Statement(Parser.java:293) > at org.apache.velocity.runtime.parser.Parser.process(Parser.java:258) > at org.apache.velocity.runtime.parser.Parser.parse(Parser.java:105) > at > org.apache.velocity.runtime.RuntimeInstance.parse(RuntimeInstance.java:1042) > at > org.apache.velocity.runtime.RuntimeInstance.parse(RuntimeInstance.java:972) > at org.apache.velocity.Template.process(Template.java:120) > at > org.apache.velocity.runtime.resource.ResourceManagerImpl.loadResource(ResourceManagerImpl.java:415) > at > org.apache.velocity.runtime.resource.ResourceManagerImpl.getResource(ResourceManagerImpl.java:335) > - locked <0x91140270> (a > org.apache.velocity.runtime.resource.ResourceManagerImpl) > at > org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1102) > at org.apache.velocity.runtime.directive.Parse.render(Parse.java:177) > at > org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:448) > at > org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170) > at > org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318) > at org.apache.velocity.runtime.directive.Parse.render(Parse.java:224) > at > org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88) > at > org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318) > at org.apache.velocity.runtime.directive.Parse.render(Parse.java:224) > at > org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:107) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88) > at > org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318) > at org.apache.velocity.runtime.directive.Parse.render(Parse.java:224) > at > org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:448) > at > org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:448) > at > org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:170) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:88) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:107) > at > org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:74) > at > org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318) > at > org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:107) > at > org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:318) > at org.apache.velocity.Template.merge(Template.java:254) > at > de.his.servlet.util.ServletUtil.parseWithVelocity(ServletUtil.java:736) > at > de.his.servlet.util.ServletUtil.sendResponseWithVelocity(ServletUtil.java:684) > at > de.his.servlet.HISServletModuleImpl.handleRequest(HISServletModuleImpl.java:637) > at > de.his.servlet.RequestDispatcherServlet.invoke(RequestDispatcherServlet.java:908) > at > de.his.servlet.RequestDispatcherServlet.handleRequest(RequestDispatcherServlet.java:843) > at > de.his.servlet.RequestDispatcherServlet.doGet(RequestDispatcherServlet.java:1060) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) > at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) > at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) > at > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) > at > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) > at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) > at > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) > at > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) > at > org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) > at > org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:868) > at > org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:663) > at > org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) > at > org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) > at > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) > at java.lang.Thread.run(Thread.java:595) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]