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Bug
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Resolution: Not A Defect
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Major
Since one of the last updates I cannot connect a slave, which is running a different java version. Jenkins is version 1.558 with Oracle Java 1.7.0_51 and the slave is an x86 box using OpenJDK 1.6.0_27. It is impossible to switch to another Java version on the node. If I try to establish the connection, it fails with this output:
[04/17/14 09:46:48] [SSH] Opening SSH connection to alpine_2_7_x86:22. [04/17/14 09:46:48] [SSH] Authentication successful. [04/17/14 09:46:48] [SSH] The remote users environment is: HOME='/home/jenkins' IFS=' ' LOGNAME='jenkins' MAIL='/var/mail/jenkins' OPTIND='1' PATH='/usr/bin:/bin:/usr/sbin:/sbin' PPID='429' PS1='\w \$ ' PS2='> ' PS4='+ ' PWD='/home/jenkins' SHELL='/bin/ash' SSH_CLIENT='10.42.23.23 51323 22' SSH_CONNECTION='10.42.23.23 51323 10.42.23.192 22' USER='jenkins' [04/17/14 09:46:48] [SSH] Checking java version of java [04/17/14 09:46:48] [SSH] java -version returned 1.6.0_27. [04/17/14 09:46:48] [SSH] Starting sftp client. [04/17/14 09:46:48] [SSH] SFTP failed. Copying via SCP. [04/17/14 09:46:48] [SSH] Copying latest slave.jar... hudson.util.IOException2: Could not copy slave.jar into '/home/jenkins/ci' on slave at hudson.plugins.sshslaves.SSHLauncher.copySlaveJarUsingSCP(SSHLauncher.java:1056) at hudson.plugins.sshslaves.SSHLauncher.copySlaveJar(SSHLauncher.java:1015) at hudson.plugins.sshslaves.SSHLauncher.access$300(SSHLauncher.java:126) at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:656) at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:642) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:744) Caused by: java.io.IOException: Error during SCP transfer. at com.trilead.ssh2.SCPClient.put(SCPClient.java:523) at hudson.plugins.sshslaves.SSHLauncher.copySlaveJarUsingSCP(SSHLauncher.java:1054) ... 8 more Caused by: java.io.IOException: Remote scp terminated unexpectedly. at com.trilead.ssh2.SCPClient.readResponse(SCPClient.java:50) at com.trilead.ssh2.SCPClient.sendBytes(SCPClient.java:140) at com.trilead.ssh2.SCPClient.put(SCPClient.java:519) ... 9 more [04/17/14 09:46:48] [SSH] Connection closed. [04/17/14 09:46:48] Launch failed - cleaning up connection
The connection itself is opened successfully and if I put slave.jar from another node onto this one, it get's deleted during the above steps. But then scp fails!? Any ideas?
The connection to another node with the same OpenJDK version but x86_64 architecture works without any problems.
[JENKINS-22651] Could not copy slave.jar into ... on slave
| Component/s | New: ssh-slaves [ 15578 ] | |
| Component/s | Original: master-slave [ 15489 ] | |
| Assignee | New: Kohsuke Kawaguchi [ kohsuke ] | |
| Labels | New: failure slaves startup |
Current setup:
- Jenkins master (x86-64): 1.565 with Oracle-JDK 1.7.0_60-b19
- Node1 (x86): OpenJDK 1.7.0_55
- Node2 (x86): OpenJDK 1.6.0_27
I gave all required information but nothing happens. Is there something on schedule to fix this? Got a bunch of buildnodes which just wasting power and that's not what they should do all the time... 
It is impossible to switch to another Java version on the node
Why is that?
Because there is no java7 available for AlpineLinux 2.7 which is running on these nodes. AlpineLinux up to 2.x is based on uCLibc and openjdk7 did not compile on these system and the version 2.7 ist the current LTS release. The current development line and next release (3.x) has switched from uCLibc to musl-libc and for these systems java7 is available. But as I said, v2.7 is the current stable release and I need to build packages for this release.
According to the log, both SFTP and SCP fail. Are you able to use these from e.g. the command line to connect to that host? What kind of SSH server is on running on that machine?
Reassigned the issue to ssh-slaves
@Yves, please define the plugin's version you use