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From Saladin Sharif <al_zaw...@yahoo.com>
Subject Re: ant script just hang when checking out of CVS [Similar problem with cvstagdiff]
Date Thu, 27 Sep 2007 01:49:00 GMT

--- Dominique Devienne <ddevienne@gmail.com> wrote:

> In general, people will help right away
> if they know the answer
> already, or can find it out easily. If
> not, which should someone else
> invest time in helping you for free? 
> Sometimes some question simply
> don't interest the community too... --DD

Very true. Thanks for the reminder.


> 
> "Request a fix" won't get you anywhere. There are a
> few things you can explore on your own:
> 1) Where does it hang? Google how to trigger a
> thread dump of your JVM
> and post it. If there's really a hang, that may give
> so clues.

That's an excellent suggestion.  I went ahead and
triggered a JVM thread dump on the hanging Ant
process.  I have copied and pasted the thread dump at
the end of this e-mail message.


> 2) Provide relevant information: version of CVS
> client? version of CVS
> server? JVM? Ant version? OS? etc...

* CVS client version:

Concurrent Versions System (CVS) 1.11.22 (client)

* JVM version:

java version "1.5.0_11"
Java(TM) 2 Runtime Environment, Standard Edition
(build 1.5.0_11-b03)
Java HotSpot(TM) Client VM (build 1.5.0_11-b03, mixed
mode, sharing)

* Ant version:
Apache Ant version 1.7.0 compiled on December 13 2006

* OS:
Microsoft Windows XP Professional


> 3) Try the same command line (a) at the command
> line,
I've already tried this, as I've already indicated in
my previous e-mail.  It works perfectly from the
command line.

> then (b) in Ant,
> in <exec>, to see if  the <exec> version, which uses
> Ant, somehow works when <cvstagdiff> doesn't.

Thanks for the suggestion. I tried this. It works from
the <exec>.


> 4) Show that you've done some research on your own.
> Google is your friend.
No need to remind a programmer.  Google is the first
place that I consult even before posting to the
mailing list.  It is much easier to search google than
it is to compose a detailed message explaining a
problem, then posting it to the mailing list.

Thanks for the suggestions,

-Saladin


P.S. I ran the my ant script in verbose mode, and then
I triggered a thread dump.  Here is the output:

Apache Ant version 1.7.0 compiled on December 13 2006
Buildfile: ..\test\ant\build.xml
Detected Java version: 1.5 in: C:\jdk1.5.0_11_w32\jre
Detected OS: Windows 2003
parsing buildfile
C:\projects\myProject\test\ant\build.xml with URI =
file:/C:/projec
ts/myProject/test/ant/build.xml
Project base dir set to: C:\projects\myProject
[antlib:org.apache.tools.ant] Could not load
definitions from resource org/apach
e/tools/ant/antlib.xml. It could not be found.
 [property] Loading Environment env.
Build sequence for target(s) `cvs' is [cvs]
Complete build sequence is [cvs, init, test,
test-reports, javadoc, email, ]

cvs:
[cvstagdiff] Executing 'cvs' with arguments:
[cvstagdiff] 'rdiff'
[cvstagdiff] '-s'
[cvstagdiff] '-D'
[cvstagdiff] '09/15/2007'
[cvstagdiff] '-D'
[cvstagdiff] '09/24/2007'
[cvstagdiff] 'myProject'
[cvstagdiff]
[cvstagdiff] The ' characters around the executable
and arguments are
[cvstagdiff] not part of the command.
Full thread dump Java HotSpot(TM) Client VM
(1.5.0_11-b03 mixed mode, sharing):

"Thread-3" daemon prio=6 tid=0x042e9028 nid=0x29c
runnable [0x043ef000..0x043ef9
ec]
        at java.io.FileInputStream.readBytes(Native
Method)
        at
java.io.FileInputStream.read(FileInputStream.java:177)
        at
org.apache.tools.ant.taskdefs.StreamPumper.run(StreamPumper.java:92)
        at java.lang.Thread.run(Thread.java:595)

"Thread-2" daemon prio=6 tid=0x04283ac0 nid=0x55c
runnable [0x0436f000..0x0436fa
6c]
        at java.io.FileInputStream.readBytes(Native
Method)
        at
java.io.FileInputStream.read(FileInputStream.java:194)
        at
java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
        at
java.io.BufferedInputStream.read1(BufferedInputStream.java:256)
        at
java.io.BufferedInputStream.read(BufferedInputStream.java:313)
        - locked <0x23dd58c0> (a
java.io.BufferedInputStream)
        at
java.io.FilterInputStream.read(FilterInputStream.java:90)
        at
org.apache.tools.ant.taskdefs.StreamPumper.run(StreamPumper.java:92)
        at java.lang.Thread.run(Thread.java:595)

"Low Memory Detector" daemon prio=6 tid=0x01d41a90
nid=0x474 runnable [0x0000000
0..0x00000000]

"CompilerThread0" daemon prio=10 tid=0x01d407a0
nid=0x123c waiting on condition
[0x00000000..0x03fefa4c]

"Signal Dispatcher" daemon prio=10 tid=0x01d3fb10
nid=0x10cc waiting on conditio
n [0x00000000..0x00000000]

"Finalizer" daemon prio=8 tid=0x01d12200 nid=0x10d8 in
Object.wait() [0x03eef000
..0x03eefa6c]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x2428c308> (a
java.lang.ref.ReferenceQueue$Lock)
        at
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
        - locked <0x2428c308> (a
java.lang.ref.ReferenceQueue$Lock)
        at
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
        at
java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)

"Reference Handler" daemon prio=10 tid=0x0003fb30
nid=0x7f0 in Object.wait() [0x
03e6f000..0x03e6faec]
        at java.lang.Object.wait(Native Method)
        - waiting on <0x2428c388> (a
java.lang.ref.Reference$Lock)
        at java.lang.Object.wait(Object.java:474)
        at
java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
        - locked <0x2428c388> (a
java.lang.ref.Reference$Lock)

"main" prio=6 tid=0x00036698 nid=0x11d0 runnable
[0x0015f000..0x0015fc3c]
        at java.lang.ProcessImpl.waitFor(Native
Method)
        at
org.apache.tools.ant.taskdefs.Execute.waitFor(Execute.java:549)
        at
org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:480)
        at
org.apache.tools.ant.taskdefs.AbstractCvsTask.runCommand(AbstractCvsT
ask.java:338)
        at
org.apache.tools.ant.taskdefs.AbstractCvsTask.execute(AbstractCvsTask
.java:395)
        at
org.apache.tools.ant.taskdefs.cvslib.CvsTagDiff.execute(CvsTagDiff.ja
va:232)
        at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native
Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at
java.lang.reflect.Method.invoke(Method.java:585)
        at
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:105)
        at
org.apache.tools.ant.Task.perform(Task.java:348)
        at
org.apache.tools.ant.Target.execute(Target.java:357)
        at
org.apache.tools.ant.Target.performTasks(Target.java:385)
        at
org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
        at
org.apache.tools.ant.Project.executeTarget(Project.java:1298)
        at
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExe
cutor.java:41)
        at
org.apache.tools.ant.Project.executeTargets(Project.java:1181)
        at
org.apache.tools.ant.Main.runBuild(Main.java:698)
        at
org.apache.tools.ant.Main.startAnt(Main.java:199)
        at
org.apache.tools.ant.launch.Launcher.run(Launcher.java:257)
        at
org.apache.tools.ant.launch.Launcher.main(Launcher.java:104)

"VM Thread" prio=10 tid=0x01d10b90 nid=0xc74 runnable

"VM Periodic Task Thread" prio=10 tid=0x01d3fa68
nid=0x10f0 waiting on condition



**********************************************************
* Saladin Sharif
* e-mail:  al_zawiah@yahoo.com
* Visit homepage @ http://gaia.ecs.csus.edu/~sharifs
**********************************************************


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