Zero code coverage with cobertura 1.9.2 but tests are working

I run the code coverage target:

<junit fork="yes" dir="${basedir}" failureProperty="test.failed">
        <!--
                        Note the classpath order: instrumented classes are before the
                        original (uninstrumented) classes.  This is important.
                -->
        <classpath path="${instrumented.dir}" />
        <classpath path="${classes.dir}" />
        <classpath refid="classpath" />
        <!--
                        The instrumented classes reference classes used by the
                        Cobertura runtime, so Cobertura and its dependencies
                        must be on your classpath.
                -->
        <classpath refid="cobertura.classpath" />

        <formatter type="xml" />
        <!--<test name="${testcase}" todir="${reports.xml.dir}" if="testcase" />-->
        <batchtest fork="yes" todir="${reports.xml.dir}">
                <fileset dir="${classes.dir}">
                        <include name="**/generated/AllTests.class" />
                </fileset>
        </batchtest>
</junit>

<junitreport todir="${reports.xml.dir}">
        <fileset dir="${reports.xml.dir}">
                <include name="TEST-*.xml" />
        </fileset>
        <report format="frames" todir="${reports.html.dir}" />
</junitreport>

Then I get the following output ( when using fork="true"):

java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at net.sourceforge.cobertura.util.FileLocker.lock(FileLocker.java:124)
        at net.sourceforge.cobertura.coveragedata.ProjectData.saveGlobalProjectData(ProjectData.java:331)
        at net.sourceforge.cobertura.coveragedata.SaveTimer.run(SaveTimer.java:31)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.IOException: No locks available
        at sun.nio.ch.FileChannelImpl.lock0(Native Method)
        at sun.nio.ch.FileChannelImpl.lock(FileChannelImpl.java:784)
        at java.nio.channels.FileChannel.lock(FileChannel.java:865)
        ... 8 more
---------------------------------------
Unable to get lock on /vobs/rnc/rrt/roam2/roamSs/RoamMao_swb/RoamMao_bldu/ant_build/cobertura.ser.lock: null
This is known to happen on Linux kernel 2.6.20.
Make sure 开发者_运维技巧cobertura.jar is in the root classpath of the jvm 
process running the instrumented code.  If the instrumented code 
is running in a web server, this means cobertura.jar should be in 
the web server's lib directory.
Don't put multiple copies of cobertura.jar in different WEB-INF/lib directories.
Only one classloader should load cobertura.  It should be the root classloader.

I am using Ant 1.7.0 and cobertura 1.9.2.

Any ideas why there is no coverage? Test run ok as I see in my target. I have tried to switch java versions ( 1.5.0_06 and 1.6.0_10) but no difference.

I found success in setting the environment property cobertura.use.java.nio=false.

Since I was using ant, I just edited the cobertura-build.xml file by adding the following to the <junit> command:

<junit fork="yes">
  <jvmarg value="-Dcobertura.use.java.nio=false"/>
  ...
</junit>

Your cobertura is crashing middle of build.

You could try to upgrade Cobertura to version 1.9.3 or 1.9.4.1. I had some problems with 1.9.4.1, though, and I am currently using 1.9.3.