Unable to start ssh slave , Getting java.lang.NullPointerException in hudson.Util.copyStream(Util.java:437)

[Prafulla T]

Hi All,

I am getting following error while starting ssh slave.
Any help on how to solve this ?

.
hudson.util.IOException2: Could not copy slave.jar to slave
        at 
hudson.plugins.sshslaves.SSHLauncher.copySlaveJar(SSHLauncher.java:530)
        at hudson.plugins.sshslaves.SSHLauncher.launch(SSHLauncher.java:291)
        at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:200)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)
Caused by: hudson.util.IOException2: Could not copy slave.jar to 
'/data/c2sw/jenkins/slave.jar' on slave
        at 
hudson.plugins.sshslaves.SSHLauncher.copySlaveJar(SSHLauncher.java:527)
        ... 7 more
Caused by: java.lang.NullPointerException
        at hudson.Util.copyStream(Util.java:437)
        at hudson.Util.copyStreamAndClose(Util.java:450)
        at 
hudson.plugins.sshslaves.SSHLauncher.copySlaveJar(SSHLauncher.java:522)
        ... 7 more
[08/19/12 00:54:21] [SSH] Connection closed.