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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=26330 Ant freezes when CPU load is high Summary: Ant freezes when CPU load is high Product: Ant Version: 1.5.4 Platform: Other OS/Version: Other Status: NEW Severity: Normal Priority: Other Component: Core AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] When CPU load is high, ant sometimes "freezes". Sending a SIGQUIT to Java to get a thread dump, I see that there is only one thread running, and it is waiting on a condition in the "org.apache.tools.ant.Project.fireTargetFinished" function. Seems that probably there is a race condition, when tasks are given very unfair scheduling (due to heavy load), the monitor is notified before the thread starts waiting? Just a guess. Here's the full thread dump, as you can see the only application thread is the one that is waiting: Full thread dump Java HotSpot(TM) Client VM (1.4.2_03-b02 mixed mode): "Signal Dispatcher" daemon prio=1 tid=0x0809d458 nid=0x1d54 waiting on condition [0..0] "Finalizer" daemon prio=1 tid=0x08088698 nid=0x1d54 in Object.wait() [4c942000..4c942854] at java.lang.Object.wait(Native Method) - waiting on <0x44c284c0> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111) - locked <0x44c284c0> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159) "Reference Handler" daemon prio=1 tid=0x08087aa8 nid=0x1d54 in Object.wait() [4c8c1000..4c8c1854] at java.lang.Object.wait(Native Method) - waiting on <0x44c28528> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:429) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:115) - locked <0x44c28528> (a java.lang.ref.Reference$Lock) "main" prio=1 tid=0x080522b8 nid=0x1d54 waiting on condition [bfffc000..bfffcb08] at org.apache.tools.ant.Project.fireTargetFinished(Project.java:1944) at org.apache.tools.ant.Target.performTasks(Target.java:337) at org.apache.tools.ant.Project.executeTarget(Project.java:1339) at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:397) at org.apache.tools.ant.taskdefs.CallTarget.execute(CallTarget.java:143) at org.apache.tools.ant.Task.perform(Task.java:341) at org.apache.tools.ant.Target.execute(Target.java:309) at org.apache.tools.ant.Target.performTasks(Target.java:336) at org.apache.tools.ant.Project.executeTarget(Project.java:1339) at org.apache.tools.ant.Project.executeTargets(Project.java:1255) at org.apache.tools.ant.Main.runBuild(Main.java:609) at org.apache.tools.ant.Main.start(Main.java:196) at org.apache.tools.ant.Main.main(Main.java:235) "VM Thread" prio=1 tid=0x08086788 nid=0x1d54 runnable "VM Periodic Task Thread" prio=1 tid=0x0809fc50 nid=0x1d54 waiting on condition "Suspend Checker Thread" prio=1 tid=0x0809cab8 nid=0x1d54 runnable --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
