Jenkins SSH Slave Configuration

Question

I am trying to configure a slave for my jenkins Master. I did the below steps.

1. enabled passwordless auth to remote host(GNU LINUX)
2. Configured the slave on master

I can see the slave.jar being copied to remote host folder. But it is failing with the below error

Expanded the channel window size to 4MB
  [11/07/14 19:11:54] [SSH] Starting slave process: cd "/test/app/abc/slavetest" && /usr/java        /jdk1.6.0_29 -XX:MaxPermSize=2048m -Xmx2048m -jar slave.jar
  bash: /usr/java/jdk1.6.0_29: is a directory
  hudson.util.IOException2: Slave JVM has terminated. Exit code=126
    at hudson.plugins.sshslaves.SSHLauncher.startSlave(SSHLauncher.java:953)
    at hudson.plugins.sshslaves.SSHLauncher.access$400(SSHLauncher.java:133)
    at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:711)
    at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:696)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
  Caused by: java.io.EOFException: unexpected stream termination
    at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:200)
    at hudson.remoting.Channel.<init>(Channel.java:419)
    at hudson.remoting.Channel.<init>(Channel.java:398)
    at hudson.remoting.Channel.<init>(Channel.java:394)
    at hudson.remoting.Channel.<init>(Channel.java:383)
    at hudson.remoting.Channel.<init>(Channel.java:375)
    at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:344)
    at hudson.plugins.sshslaves.SSHLauncher.startSlave(SSHLauncher.java:945)
    ... 7 more  
  [11/07/14 19:11:54] Launch failed - cleaning up connection
  [11/07/14 19:11:54] [SSH] Connection closed.

Any idea what I am doing wrong?

Answer 1

You have your slave's path to the java executable misconfigured:

/usr/java        /jdk1.6.0_29 -XX:MaxPermSize=2048m -Xmx2048m -jar slave.jar

The blank space should be removed, and the full path should be

/usr/java/jdk1.6.0_29/bin/java