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Thread: NFS mounts fail whilst amanda is running

  1. #1
    Join Date
    Nov 2011
    Posts
    4

    Default NFS mounts fail whilst amanda is running

    I've got a bit of an odd issue backing up an RHEL6 client (amanda-2.6.1p2) to an Scientific Linux 5 Server (amanda-2.5.0p2).

    We have a variety of cron jobs that call scripts from automounted NFS shares, whilst amanda is running the mounting of these shares fail (even manually)!

    The problem seems to persist even when I switched to using a test server running SL6 (amanda-2.6.1p2) and also whilst running a downgraded client.

    An strace of the runtar process reveals an awful lot of error messages similar to;

    bind(7, {sa_family=AF_INET, sin_port=htons(891), sin_addr=inet_addr("0.0.0.0")}, 16) = -1 EADDRINUSE (Address already in use)

    The mount command returns an Input/Output error.

    Can anyone think of what might be causing this?

  2. #2
    Join Date
    Nov 2011
    Posts
    4

    Default

    "An strace of the runtar"

    should have read

    "An strace of the tar command during sendbackup"

  3. #3
    Join Date
    Nov 2011
    Posts
    4

    Default

    I can reproduce this error on demand now by enabling/disabling nis using;

    authconfig --update --enablenis
    authconfig --update --disablenis

    the backup completes in about 1/4 of the time when NIS is disabled.

  4. #4
    Join Date
    Nov 2011
    Posts
    4

    Default

    This is being caused by NIS group lookups, changing the group line in nsswitch.conf from;

    group: file nis

    to

    group: file

    stops the errors from occurring.

    How to fix this is a different matter..

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