CODEWITHSUNDEEP
jenkinssshjenkins-agent
Upen
Upen

Reputation: 1438

Jenkins SSH agent Configuration

I am trying to configure a agent for my Jenkins controller. I did the below steps.

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

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?

Upvotes: 0

Views: 9870

Answers (2)

user5692103
user5692103

Reputation: 31

I just ran into this as well. Best to check the docker container/slave's java path by logging into the container and running whereis java.

The java path of the host and agent are probably not the same. And that jar and the java command is being executed from within the agent.

Upvotes: 1

gareth_bowles
gareth_bowles

Reputation: 21150

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

Upvotes: 3

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