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  1. Velocity
  2. VELOCITY-562

Hanging in jj_scan_token (while holding lock for getResouce)

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Cannot Reproduce
    • Affects Version/s: 1.5
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None
    • Environment:
      Integreated in Tomcat on Ubuntu Linux
      JDK version: 1.5.0_08-b03

      Description

      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)

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            • Assignee:
              Unassigned
              Reporter:
              nhb nhb

              Dates

              • Created:
                Updated:
                Resolved:

                Issue deployment