Public bug reported:
Steps to replicate the problem:
1) Install NFS server at nfs-server and export /export/test
2) Install NFS client at nfs-client and mount /export/test from nfs-server
3) Somehow you need to block connections at nlockmgr service in the nfs-server
(Connection refused). The results should be like the following:
nfs-server ~ # rpcinfo -t 127.0.0.1 nlockmgr
rpcinfo: RPC: Remote system error - Connection refused
program 100021 is not available
But, nlockmgr have to be listed in your rpcinfo -p:
nfs-server ~ # rpcinfo -p
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100021 3 udp 55320 nlockmgr
100021 3 tcp 38808 nlockmgr
100021 4 tcp 38468 nlockmgr
100021 1 udp 812 nlockmgr
100021 1 tcp 814 nlockmgr
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100227 2 tcp 2049
100227 3 tcp 2049
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100227 2 udp 2049
100227 3 udp 2049
100005 1 udp 50765 mountd
100005 1 tcp 52776 mountd
100005 2 udp 42094 mountd
100005 2 tcp 59107 mountd
100005 3 udp 57465 mountd
100005 3 tcp 51252 mountd
100024 1 udp 42341 status
100024 1 tcp 33932 status
4) Then, you try to get a lock at any file in nfs-client. Example:
python
>>> import fcntl; fp = open('index.html', 'w'); fcntl.flock(fp,
fcntl.LOCK_EX)
The client will hang forever and you have to kill -9 your python
process.
nfs-client ~ # lsb_release -rd
Description: Ubuntu 12.04.4 LTS
Release: 12.04
nfs-client ~ # apt-cache policy nfs-common
nfs-common:
Installed: 1:1.2.5-3ubuntu3.1
Candidate: 1:1.2.5-3ubuntu3.1
Version table:
*** 1:1.2.5-3ubuntu3.1 0
500 http://br.archive.ubuntu.com/ubuntu/ precise-updates/main amd64
Packages
100 /var/lib/dpkg/status
1:1.2.5-3ubuntu3 0
500 http://br.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
** Affects: nfs-utils (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1340451
Title:
nfs client hangs when nlockmgr service at rpcbind refuses connection
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/1340451/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
