Just encountered sporadic "No space left on device" errors in the Puppet reports for our Jenkins master. It turned out that /tmp was polluted with over 8000 files of the form "+~JF*.tmp" owned by the user running Jenkins:
-rw------- 1 jenkins jenkins 240456 Dec 13 11:18 +~JF9196768992512109284.tmp
I deleted them to free space, but it continues to write new ones at fast pace (again 2640 files while I'm writing this).