Jenkins - FATAL: Unable to produce a script file

Immediately after syncing code from perforce, a job in jenkins fails with the error message:


09:16:33  Sync complete, took 8001 ms
09:16:33  No emails were triggered.
09:16:33  FATAL: Unable to produce a script file
09:16:33  hudson.util.IOException2: Failed to create a temp file on /export/jenkins/jobs/jenkins-blr-backup/workspace

Fix: Restarted the jenkins fixed the issue
Root cause:  No idea !!!!