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Thread: Deleted files not freeing their handle in /tmp

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    Default Deleted files not freeing their handle in /tmp

    We have a recurring problem on our 4.5.6 Network Edition server. The /tmp directory keeps filling up but the space reported with user space tools ("du" for example) is next to nothing.

    According to the standard system tools:
    Code:
    [root@mail tmp]# df -h
    Filesystem            Size  Used Avail Use% Mounted on
    ...snipped...
    /dev/md3              3.0G  1.8G  1.1G  63% /tmp
    But looking at the /tmp directory with "du" reveals....
    Code:
    [root@mail tmp]# du -hs /tmp
    820K    /tmp
    Digging deeper with "lsof" we see the following:
    Code:
    [root@mail tmp]# lsof | grep "/tmp"
    bash       1970    root  cwd       DIR        9,3       4096          2 /tmp
    screen    13507   jgray    3r     FIFO        9,3                 15747 /tmp/uscreens/S-jgray/13507.pts-0.mail
    perl      19932  zimbra    1w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
    perl      19932  zimbra    2w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
    zmlogger  19937  zimbra    1w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
    zmlogger  19937  zimbra    2w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
    zmlogger  19937  zimbra    4w      REG        9,3 1884374605         26 /tmp/zmlogger.out (deleted)
    mysqld_sa 21321  zimbra    1w      REG        9,3         70         15 /tmp/zmcontrol.out.20738 (deleted)
    mysqld_sa 21321  zimbra    2w      REG        9,3         70         15 /tmp/zmcontrol.out.20738 (deleted)
    logswatch 21391  zimbra    1w      REG        9,3         82         19 /tmp/logswatch.out
    logswatch 21391  zimbra    2w      REG        9,3         82         19 /tmp/logswatch.out
    mysqld    21402  zimbra    5u      REG        9,3          0         20 /tmp/ibD4jO0l (deleted)
    mysqld    21402  zimbra    6u      REG        9,3          0         21 /tmp/ibzy1fOB (deleted)
    mysqld    21402  zimbra    7u      REG        9,3          0         22 /tmp/ibXukIBR (deleted)
    mysqld    21402  zimbra    8u      REG        9,3          0         23 /tmp/ibJj1dq7 (deleted)
    mysqld    21402  zimbra   12u      REG        9,3          0         25 /tmp/iblBE0Vn (deleted)
    perl      21423  zimbra    1w      REG        9,3         82         19 /tmp/logswatch.out
    perl      21423  zimbra    2w      REG        9,3         82         19 /tmp/logswatch.out
    zmlogger  21446  zimbra    1w      REG        9,3         82         19 /tmp/logswatch.out
    zmlogger  21446  zimbra    2w      REG        9,3         82         19 /tmp/logswatch.out
    zmlogger  21446  zimbra    4w      REG        9,3     373318         27 /tmp/zmlogger.out
    mysqld_sa 21877  zimbra    1w      REG        9,3     105248         17 /tmp/zmcontrol.out.20738 (deleted)
    mysqld_sa 21877  zimbra    2w      REG        9,3     105248         17 /tmp/zmcontrol.out.20738 (deleted)
    mysqld    21972  zimbra    5u      REG        9,3       3075         28 /tmp/ibagshl0 (deleted)
    mysqld    21972  zimbra    6u      REG        9,3          0         29 /tmp/ibY1LZ2w (deleted)
    mysqld    21972  zimbra    7u      REG        9,3          0         30 /tmp/ibakKIK3 (deleted)
    mysqld    21972  zimbra    8u      REG        9,3          0         31 /tmp/ib4yAKFB (deleted)
    mysqld    21972  zimbra   12u      REG        9,3          0         32 /tmp/ibk4EXla (deleted)
    java      22007  zimbra  mem       REG        9,3      32768     299138 /tmp/hsperfdata_zimbra/22007
    zmtomcatm 22790    root    1w      REG        9,3     105248         17 /tmp/zmcontrol.out.20738 (deleted)
    zmtomcatm 22790    root    2w      REG        9,3     105248         17 /tmp/zmcontrol.out.20738 (deleted)
    java      22791  zimbra  mem       REG        9,3      32768     330626 /tmp/hsperfdata_root/22791
    swatch    23099  zimbra    1w      REG        9,3         79         34 /tmp/swatch.out
    swatch    23099  zimbra    2w      REG        9,3         79         34 /tmp/swatch.out
    perl      23117  zimbra    1w      REG        9,3         79         34 /tmp/swatch.out
    perl      23117  zimbra    2w      REG        9,3         79         34 /tmp/swatch.out
    lsof      27703    root  cwd       DIR        9,3       4096          2 /tmp
    bash      27704    root  cwd       DIR        9,3       4096          2 /tmp
    lsof      27705    root  cwd       DIR        9,3       4096          2 /tmp
    logswatch 28631  zimbra    1w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
    logswatch 28631  zimbra    2w      REG        9,3      71523         18 /tmp/logswatch.out (deleted)
    sshd      32234   jgray    7u     unix 0xc67d0380              98791141 /tmp/ssh-JGggs32234/agent.32234
    See all the deleted files? Despite restarting Zimbra, the file handles are not being freed. Below is a graph showing how quickly the space is being "consumed" on /tmp - when it is full, Zimbra will crash; it happened a few weeks ago.
    Attached Images Attached Images

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