[Bug 1101779] Re: autofs "lookup_mount: exports lookup" fails on IPv6-only hosts

[Andreas Hasenack]

This was fixed in
https://launchpad.net/ubuntu/+source/autofs/5.1.5-1ubuntu1, which is
linked with a newer libtirpc.

** Changed in: autofs (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1101779

Title:
  autofs "lookup_mount: exports lookup" fails on IPv6-only hosts

Status in autofs package in Ubuntu:
  Fix Released
Status in Debian:
  Fix Released
Status in Fedora:
  Fix Released

Bug description:
  Using Linux Mint 14 and both autofs 5.0.6 and 5.0.7, when attempting to access an NFS server mounted under /net with an auto.master configuration such as:
  /net -hosts

  If the host is only accessible over IPv6 (i.e. it only has an AAAA record in DNS, or there is no accessible A address), attempting to 'cd' to its host name (e.g. "cd /net/server") will timeout after a few seconds (bash: cd: server: No such file or directory) and result in a syslog entry similar to:
  Jan 19 22:39:43 client automount[5582]: lookup_mount: exports lookup failed for server

  Immediately upon adding an accessible A (IPv4) address for the server,
  everything will work correctly (and NFS mounts created by autofs will
  continue to use the IPv6 address by default).

  It appears that the rpc_get_exports() function in autofs is not
  correctly defaulting to IPv6 when it is available, even though NFS
  will default to IPv6, and is failing when the server is not accessible
  over IPv4.

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