We use variable names in the view name to prevent view name collisions on
different nodes. When a workspace is "wiped out" via the UI, the clearcase
plugin tries to issue the rmview command but fails as it can't resolve the build
variables.

Here's the logs:

INFO | jvm 1 | 2009/08/21 14:20:32 | Aug 21, 2009 2:20:32 PM
hudson.plugins.clearcase.util.BuildVariableResolver resolve
INFO | jvm 1 | 2009/08/21 14:20:32 | WARNING: Variable name 'NODE_NAME'
look up failed because of java.lang.NullPointerException
INFO | jvm 1 | 2009/08/21 14:20:32 | Aug 21, 2009 2:20:32 PM
hudson.plugins.clearcase.util.BuildVariableResolver resolve
INFO | jvm 1 | 2009/08/21 14:20:32 | WARNING: Variable name 'JOB_NAME' look
up failed because of java.lang.NullPointerException
INFO | jvm 1 | 2009/08/21 14:20:32 | [hudson-slave] $ cleartool rmview
-force hudson_${NODE_NAME}_${JOB_NAME}
INFO | jvm 1 | 2009/08/21 14:20:33 | cleartool: Error: Unable to open file
"hudson_${NODE_NAME}_${JOB_NAME}/.view": No such file or directory.
INFO | jvm 1 | 2009/08/21 14:20:33 | cleartool: Error:
hudson_${NODE_NAME}_${JOB_NAME} isn't a view: No such file or directory
INFO | jvm 1 | 2009/08/21 14:20:33 | cleartool: Error: Unable to remove
view "hudson_${NODE_NAME}_${JOB_NAME}".
INFO | jvm 1 | 2009/08/21 14:20:33 | Base ClearCase failed. exit code=1
INFO | jvm 1 | 2009/08/21 14:20:33 | Aug 21, 2009 2:20:33 PM
hudson.plugins.clearcase.AbstractClearCaseScm processWorkspaceBeforeDeletion
INFO | jvm 1 | 2009/08/21 14:20:33 | WARNING: Failed to remove ClearCase view
INFO | jvm 1 | 2009/08/21 14:20:33 | java.io.IOException: cleartool did not
return the expected exit code. Command line="rmview -force
hudson_${NODE_NAME}_${JOB_NAME}", actual exit code=1
INFO | jvm 1 | 2009/08/21 14:20:33 | at
hudson.plugins.clearcase.HudsonClearToolLauncher.run(HudsonClearToolLauncher.java:100)
INFO | jvm 1 | 2009/08/21 14:20:33 | at
hudson.plugins.clearcase.ClearToolSnapshot.rmview(ClearToolSnapshot.java:98)
INFO | jvm 1 | 2009/08/21 14:20:33 | at
hudson.plugins.clearcase.AbstractClearCaseScm.processWorkspaceBeforeDeletion(AbstractClearCaseScm.java:422)