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Thread: NE Full backup problem

  1. #1
    Matt is offline Active Member
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    Default NE Full backup problem

    Hi all,

    Having a problem with full backups hanging and causing Zimbra to be unavailable on the affected server. Incrementals work fine. I've tried running the full backups manually with the debug output and it always seems to stall on my mailbox:

    [zimbra@zimbra sessions_tmp]$ zmbackupquery | head
    full-20061123.152635.049
    Started: Thu Nov 23 15:26:35 GMT 2006
    Redo log sequence range: 121 .. 121
    Currently backing up account matt@adomain.com
    4 out of 10 accounts have been backed up

    36M ./full-20061123.152635.049

    It just sits there saying the same thing with the session_tmp directory not increasing in size. Top shows the box as being idle.

    After a while the UI stops working - its unable to open messages.

    I'm unable to abort the backup although it gives me no feedback from the abort command. I have to issue a zmcontrol stop and start, then its ok again. If I run a full backup straight after this, it works

    Can't see anything obvious in the logs. Does anyone have any useful suggestions?

    Thanks.

  2. #2
    inigoml's Avatar
    inigoml is offline Project Contributor
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    Default Enable Perdition

    Hi Matt.

    This is a know problem with Zimbra and IMAP4 SSL connections. There is a fix coming for later releases, but it's very easy to solve this problem with this fix. Install perdition (imap/pop3 proxy support).

    http://bugzilla.zimbra.com/show_bug.cgi?id=6623

    Deploying perdition is really easy and you will get extra benefit in performance.

    http://wiki.zimbra.com/index.php?tit...ring_Perdition

    Ah, perdition sometimes do not stop properly when you call zmperdition. In that cases, "pkill -9 perdition".

    Quote Originally Posted by Matt View Post
    Hi all,

    Having a problem with full backups hanging and causing Zimbra to be unavailable on the affected server. Incrementals work fine. I've tried running the full backups manually with the debug output and it always seems to stall on my mailbox:

    [zimbra@zimbra sessions_tmp]$ zmbackupquery | head
    full-20061123.152635.049
    Started: Thu Nov 23 15:26:35 GMT 2006
    Redo log sequence range: 121 .. 121
    Currently backing up account matt@adomain.com
    4 out of 10 accounts have been backed up

    36M ./full-20061123.152635.049

    It just sits there saying the same thing with the session_tmp directory not increasing in size. Top shows the box as being idle.

    After a while the UI stops working - its unable to open messages.

    I'm unable to abort the backup although it gives me no feedback from the abort command. I have to issue a zmcontrol stop and start, then its ok again. If I run a full backup straight after this, it works

    Can't see anything obvious in the logs. Does anyone have any useful suggestions?

    Thanks.

  3. #3
    Matt is offline Active Member
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    Default

    Sorry, I'm confused; are the backups done using an IMAP connection to each mailbox in turn? Or are you saying that if I leave an IMAP client connected to my Zimbra account whilst trying to run a full backup, it will prevent the backup from running?

    Thanks.

  4. #4
    inigoml's Avatar
    inigoml is offline Project Contributor
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    Default IMAPS locks

    If did myself same question. And the answer is the second one. There is a locking problem between IMAPS threads and backup task.

    Quote Originally Posted by Matt View Post
    Sorry, I'm confused; are the backups done using an IMAP connection to each mailbox in turn? Or are you saying that if I leave an IMAP client connected to my Zimbra account whilst trying to run a full backup, it will prevent the backup from running?

    Thanks.

  5. #5
    Matt is offline Active Member
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    Default

    Ahh ok. Thanks for the reply.

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