Looking through my Hudson log file, I see hundreds (thousands?) of exceptions
such as this:

Apr 3, 2007 5:28:13 PM
hudson.org.apache.tools.ant.taskdefs.cvslib.ChangeLogParser processFile
WARNING: Failed to read CVS/Repository at
/hudson/workdir/jobs/trunk/workspace/xml/schema/core/test/build.xml/../CVS/Repository
java.io.FileNotFoundException:
/hudson/workdir/jobs/trunk/workspace/xml/schema/core/test/build.xml/../CVS/Repository
(Not a directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at org.apache.commons.io.FileUtils.readFileToString(FileUtils.java:874)
at
hudson.org.apache.tools.ant.taskdefs.cvslib.ChangeLogParser.processFile(ChangeLogParser.java:198)
at
hudson.org.apache.tools.ant.taskdefs.cvslib.ChangeLogParser.stdout(ChangeLogParser.java:134)
at
hudson.org.apache.tools.ant.taskdefs.cvslib.RedirectingOutputStream.processLine(RedirectingOutputStream.java:48)
at
org.apache.tools.ant.util.LineOrientedOutputStream.processBuffer(LineOrientedOutputStream.java:82)
at
org.apache.tools.ant.taskdefs.LogOutputStream.processBuffer(LogOutputStream.java:67)
at
org.apache.tools.ant.util.LineOrientedOutputStream.write(LineOrientedOutputStream.java:57)
at
org.apache.tools.ant.util.LineOrientedOutputStream.write(LineOrientedOutputStream.java:132)
at hudson.util.ForkOutputStream.write(ForkOutputStream.java:29)
at org.apache.tools.ant.taskdefs.StreamPumper.run(StreamPumper.java:93)
at java.lang.Thread.run(Thread.java:595)

Of course

/hudson/workdir/jobs/trunk/workspace/xml/schema/core/test/CVS/Repository

exists with the correct contents. I don't think the use of "/../" is safe on a
file. You should ask for getParentFile().

I understand this code is just a few days old, so it is quite possible it is
simply broken, and not just a problem in my environment.