the log:

[08/24/11 13:36:28] [SSH] Opening SSH connection to 10.0.0.172:22.
[08/24/11 13:36:28] [SSH] Authenticating as jenkins with /var/lib/jenkins/.ssh/id_rsa.
[08/24/11 13:36:28] [SSH] Authentication successful.
[08/24/11 13:36:28] [SSH] The remote users environment is:
BASH=/bin/bash
BASHOPTS=cmdhist:extquote:force_fignore:hostcomplete:interactive_comments:progcomp:promptvars:sourcepath
BASH_ALIASES=()
BASH_ARGC=()
BASH_ARGV=()
BASH_CMDS=()
BASH_EXECUTION_STRING=set
BASH_LINENO=()
BASH_SOURCE=()
BASH_VERSINFO=([0]="4" [1]="2" [2]="8" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
BASH_VERSION='4.2.8(1)-release'
DIRSTACK=()
EUID=1001
GROUPS=()
HOME=/home/jenkins
HOSTNAME=jasmine
HOSTTYPE=x86_64
IFS=$' \t\n'
LANG=en_US.UTF-8
LOGNAME=jenkins
MACHTYPE=x86_64-pc-linux-gnu
MAIL=/var/mail/jenkins
OPTERR=1
OPTIND=1
OSTYPE=linux-gnu
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
PIPESTATUS=([0]="0")
PPID=2225
PS4='+ '
PWD=/home/jenkins
SHELL=/bin/bash
SHELLOPTS=braceexpand:hashall:interactive-comments
SHLVL=1
SSH_CLIENT='10.0.0.61 58049 22'
SSH_CONNECTION='10.0.0.61 58049 10.0.0.172 22'
TERM=dumb
UID=1001
USER=jenkins
XDG_SESSION_COOKIE=1efab6c78ed99d8f60f23b1200000004-1314185788.699084-472866313
_=']'
[08/24/11 13:36:29] [SSH] Checking java version of java
Couldn't figure out the Java version of java
bash: java: command not found

[08/24/11 13:36:29] [SSH] Checking java version of /usr/bin/java
Couldn't figure out the Java version of /usr/bin/java
bash: /usr/bin/java: No such file or directory

[08/24/11 13:36:29] [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

[08/24/11 13:36:29] [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

[08/24/11 13:36:29] [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

[08/24/11 13:36:29] [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

[08/24/11 13:36:29] [SSH] Checking java version of /home/jenkins/jdk/bin/java
Couldn't figure out the Java version of /home/jenkins/jdk/bin/java
bash: /home/jenkins/jdk/bin/java: No such file or directory

Linux jasmine 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:24 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
Installing JDK jdk-6u16-oth-JPR@CDS-CDS_Developer
Downloading JDK from http://download.oracle.com/otn-pub/java/jdk/6u16-b01//jdk-6u16-linux-x64.bin
ERROR: Unexpected error in launching a slave. This is probably a bug in Jenkins.
java.lang.OutOfMemoryError: Java heap space
at org.apache.commons.io.output.ByteArrayOutputStream.needNewBuffer(ByteArrayOutputStream.java:128)
at org.apache.commons.io.output.ByteArrayOutputStream.write(ByteArrayOutputStream.java:158)
at org.apache.commons.io.IOUtils.copyLarge(IOUtils.java:1026)
at org.apache.commons.io.IOUtils.copy(IOUtils.java:999)
at org.apache.commons.io.IOUtils.toByteArray(IOUtils.java:218)
at com.gargoylesoftware.htmlunit.WebResponseData.getBody(WebResponseData.java:133)
at com.gargoylesoftware.htmlunit.WebResponseData.<init>(WebResponseData.java:86)
at com.gargoylesoftware.htmlunit.HttpWebConnection.newWebResponseDataInstance(HttpWebConnection.java:443)
at com.gargoylesoftware.htmlunit.HttpWebConnection.makeWebResponse(HttpWebConnection.java:423)
at com.gargoylesoftware.htmlunit.HttpWebConnection.getResponse(HttpWebConnection.java:100)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection(WebClient.java:1456)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponse(WebClient.java:1387)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection(WebClient.java:1513)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponse(WebClient.java:1387)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection(WebClient.java:1513)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponse(WebClient.java:1387)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:328)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:389)
at hudson.tools.JDKInstaller.locate(JDKInstaller.java:349)
at hudson.plugins.sshslaves.SSHLauncher.attemptToInstallJDK(SSHLauncher.java:345)
at hudson.plugins.sshslaves.SSHLauncher.resolveJava(SSHLauncher.java:282)
at hudson.plugins.sshslaves.SSHLauncher.launch(SSHLauncher.java:234)
at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:199)
at java.util.concurrent.FutureTask$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)