Auto installation of ssh-slaves via "ssh" install the wrong version of Java. We have configured Jenkins to use Java 6 30u, but it's installing Java 6 16u on Oracle Linux (Redhat).

We see that oracle.com has the version of Java we are expecting to be installed.

Log file below, please note that it's even worst, because it even fail installing the too old version of Java.

[03/21/12 09:38:04] [SSH] Opening SSH connection to 172.23.8.70:22.
[03/21/12 09:38:04] [SSH] Authenticating as root with C:\Users\CISERVER\.ssh\id_rsa.
[03/21/12 09:38:04] [SSH] Authentication successful.
[03/21/12 09:38:11] [SSH] The remote users environment is:
BASH=/bin/bash
BASH_ARGC=()
BASH_ARGV=()
BASH_EXECUTION_STRING=set
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="3" [1]="2" [2]="25" [3]="1" [4]="release" [5]="x86_64-redhat-linux-gnu")
BASH_VERSION='3.2.25(1)-release'
COLORS=/etc/DIR_COLORS
CVS_RSH=ssh
DIRSTACK=()
EUID=0
GROUPS=()
G_BROKEN_FILENAMES=1
HOME=/root
HOSTNAME=oxgslcopsda02
HOSTTYPE=x86_64
IFS=$' \t\n'
LANG=en_US.UTF-8
LESSOPEN='|/usr/bin/lesspipe.sh %s'
LOGNAME=root
LS_COLORS=
MACHTYPE=x86_64-redhat-linux-gnu
MAIL=/var/mail/root
OPTERR=1
OPTIND=1
OSTYPE=linux-gnu
PATH=/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
PIPESTATUS=([0]="0")
PPID=4006
PS4='+ '
PWD=/root
SHELL=/bin/bash
SHELLOPTS=braceexpand:hashall:interactive-comments
SHLVL=1
SSH_ASKPASS=/usr/libexec/openssh/gnome-ssh-askpass
SSH_CLIENT='172.23.8.50 65195 22'
SSH_CONNECTION='172.23.8.50 65195 172.23.8.70 22'
TERM=dumb
UID=0
USER=root
_=/etc/bashrc
consoletype=serial
tmpid=0
[03/21/12 09:38:11] [SSH] Checking java version of java
[03/21/12 09:40:20] [SSH] java -version returned 1.4.2.
[03/21/12 09:40:20] [SSH] Checking java version of /usr/bin/java
[03/21/12 09:40:20] [SSH] /usr/bin/java -version returned 1.4.2.
[03/21/12 09:40:20] [SSH] Checking java version of /usr/java/default/bin/java
Couldn't figure out the Java version of /usr/java/default/bin/java
bash: /usr/java/default/bin/java: No such file or directory

[03/21/12 09:40:20] [SSH] Checking java version of /usr/java/latest/bin/java
Couldn't figure out the Java version of /usr/java/latest/bin/java
bash: /usr/java/latest/bin/java: No such file or directory

[03/21/12 09:40:20] [SSH] Checking java version of /usr/local/bin/java
Couldn't figure out the Java version of /usr/local/bin/java
bash: /usr/local/bin/java: No such file or directory

[03/21/12 09:40:20] [SSH] Checking java version of /usr/local/java/bin/java
Couldn't figure out the Java version of /usr/local/java/bin/java
bash: /usr/local/java/bin/java: No such file or directory

[03/21/12 09:40:21] [SSH] Checking java version of /jenkinsslave/jdk/bin/java
Couldn't figure out the Java version of /jenkinsslave/jdk/bin/java
bash: /jenkinsslave/jdk/bin/java: No such file or directory

Linux oxgslcopsda02 2.6.32-300.10.1.el5uek #1 SMP Wed Feb 22 17:37:40 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
Installing JDK6u16
hudson.util.IOException2: Could not find any known supported java version in [java, /usr/bin/java, /usr/java/default/bin/java, /usr/java/latest/bin/java, /usr/local/bin/java, /usr/local/java/bin/java, /jenkinsslave/jdk/bin/java], and we also failed to install JDK as a fallback
at hudson.plugins.sshslaves.SSHLauncher.resolveJava(SSHLauncher.java:350)
at hudson.plugins.sshslaves.SSHLauncher.launch(SSHLauncher.java:288)
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: java.io.IOException: Unexpected end of sftp stream.
at com.trilead.ssh2.SFTPv3Client.readBytes(SFTPv3Client.java:218)
at com.trilead.ssh2.SFTPv3Client.receiveMessage(SFTPv3Client.java:241)
at com.trilead.ssh2.SFTPv3Client.write(SFTPv3Client.java:1341)
at hudson.plugins.sshslaves.SFTPClient$1.write(SFTPClient.java:102)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109)
at hudson.Util.copyStream(Util.java:409)
at hudson.Util.copyStreamAndClose(Util.java:421)
at hudson.plugins.sshslaves.SSHLauncher.attemptToInstallJDK(SSHLauncher.java:418)
at hudson.plugins.sshslaves.SSHLauncher.resolveJava(SSHLauncher.java:348)
... 7 more
[03/21/12 09:41:35] [SSH] Connection closed.