问题表现：
Updating ............ revision: May 23, 2013 1:25:27 PM depth:infinity ignoreExternals: false
U integration_tests/src/test/java/com/gsegment/svom/PacketWorkflowTest.java
At revision 2815
Starting xvnc
[workspace] $ vncserver :78 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :82 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :59 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :86 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :60 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :23 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :92 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :79 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :37 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :73 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
Starting xvnc
[workspace] $ vncserver :87 -localhost -nolisten tcp
You will require a password to access your desktops.
Password: Password too short
FATAL: Failed to run 'vncserver :87 -localhost -nolisten tcp' (exit code 1), blacklisting display #87; consider checking the "Clean up before start" option
java.io.IOException: Failed to run 'vncserver :87 -localhost -nolisten tcp' (exit code 1), blacklisting display #87; consider checking the "Clean up before start" option
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:110)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.doSetUp(Xvnc.java:108)
at hudson.plugins.xvnc.Xvnc.setUp(Xvnc.java:80)
at hudson.model.Build$RunnerImpl.doRun(Build.java:129)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:434)
at hudson.model.Run.run(Run.java:1390)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:40)
at hudson.model.ResourceController.execute(ResourceController.java:82)
at hudson.model.Executor.run(Executor.java:137)
解决方案：解决这个问题其实很简单。首先你需要用hudson账号登陆你服务器（如果不知道账号密码，可以通过root或其他管理员用户修改hudson用户密码）。然后在hudson账户下运行指令：vncserver
这时要求你输入密码。完成后再重新再hudson中build。