Ant build step does not work on AIX slave

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      I'm trying to execute an Ant build script on a AIX slave where I don't have administrator rights. JAVA_HOME and ANT_HOME are not set by default, so I had to set them (and add them to PATH) in the node configuration.
      I deliberately did not configure an Ant installation, neither on the master nor on the slave.

      This is the stacktrace that I'm seeing:

      [aixtest] $ ant -version
FATAL: command execution failed.Maybe you need to configure the job to choose one of your Ant installations?
java.io.IOException: Cannot run program "ant" (in directory "/home/xxx/jenkins/workspace/aixtest"): error=2, A file or directory in the path name does not exist.
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:471)
	at hudson.Proc$LocalProc.<init>(Proc.java:244)
	at hudson.Proc$LocalProc.<init>(Proc.java:216)
	at hudson.Launcher$LocalLauncher.launch(Launcher.java:707)
	at hudson.Launcher$ProcStarter.start(Launcher.java:338)
	at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:932)
	at hudson.Launcher$RemoteLaunchCallable.call(Launcher.java:899)
	at hudson.remoting.UserRequest.perform(UserRequest.java:118)
	at hudson.remoting.UserRequest.perform(UserRequest.java:48)
	at hudson.remoting.Request$2.run(Request.java:287)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:314)
	at java.util.concurrent.FutureTask.run(FutureTask.java:149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:897)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:919)
	at java.lang.Thread.run(Thread.java:738)
Caused by: java.io.IOException: error=2, A file or directory in the path name does not exist.
	at java.lang.UNIXProcess.forkAndExec(Native Method)
	at java.lang.UNIXProcess.<init>(UNIXProcess.java:53)
	at java.lang.ProcessImpl.start(ProcessImpl.java:112)
	at java.lang.ProcessBuilder.start(ProcessBuilder.java:464)
	... 15 more

      Oddly enough, if I add an "Execute shell command" build step right before the Ant build step with the command "ant -version" it works:

      [aixtest] $ /bin/sh -xe /tmp/hudson5535938035142068913.sh
+ ant -version
Apache Ant(TM) version 1.9.2 compiled on July 8 2013

      I debugged both the shell command and the ant execution but could not find any obvious difference. Both are calling something like:

      launcher.launch().cmds(args).envs(env).stdout(aca).pwd(buildFilePath.getParent()).join();

      In both cases the environment variables seem to be set correctly.

            Assignee:
            Unassigned
            Reporter:
            Fred G
            Archiver:
            Jenkins Service Account

              Created:
              Updated:
              Archived: