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RPC が予約ポートにバインドできない - RHEL 4 での予約ポートの枯渇

Solution In Progress - Updated -

Issue

ポートプール (sunrpc.min_resvport から sunrpc.max_resvport まで) が使い果たされているために、ユーザーが自動マウントされたホームディレクトリーを取得できない場合があります。

/var/log/messages には次の内容が表示されます。

Oct  7 13:43:33 client kernel: RPC: Can't bind to reserved port (98).
Oct  7 13:43:33 client kernel: RPC: can't bind to reserved port.
Oct  7 13:43:33 client kernel: RPC: error 5 connecting to server server
Oct  7 13:43:33 client automount[8548]: >> mount: server:/vol/dev_users/se69639: can't read superblock
Oct  7 13:43:33 client automount[8548]: mount(nfs): nfs: mount failure server:/vol/dev_users/se69639 on /home/se69639
Oct  7 13:43:33 client automount[8548]: failed to mount /home/se69639

Environment

  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • NFS

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