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[Linux-cluster] Rhel 6.4 : GFS2 Mountgroups - flags 0x00000005 blocked, join



Dear List,
 I'm running a Rhel 6.4 cluster and periodically i'm unable to mount some volumes. The volumes are iSCSI attached and clvm confirms them to be healthy and reachable.

The mount fails, actually just hangs.

The failing volumes have the"blocked,join" status. Any ideas on how to unblock these specific volumes without rebooting the whole cluster ?

root node12:~# uname -a
Linux node12 2.6.32-358.18.1.el6.x86_64 #1 SMP Fri Aug 2 17:04:38 EDT 2013 x86_64 x86_64 x86_64 GNU/Linux

root node12:~# group_tool 
fence domain
member count  6
victim count  0
victim now    0
master nodeid 3
wait state    none
members       1 3 10 11 12 16 

dlm lockspaces
name          disk10-thin
id            0xbcc604bc
flags         0x00000008 fs_reg
change        member 4 joined 1 remove 0 failed 0 seq 1,1
members       3 10 11 12 

name          clvmd
id            0x4104eefa
flags         0x00000000 
change        member 6 joined 1 remove 0 failed 0 seq 4,4
members       1 3 10 11 12 16 

gfs mountgroups
name          disk10-thin
id            0x8016e569
flags         0x00000008 mounted
change        member 3 joined 1 remove 0 failed 0 seq 1,1
members       10 11 12 

name          cluster4_disk8
id            0xef70c9dc
flags         0x00000005 blocked,join
change        member 5 joined 1 remove 0 failed 0 seq 3,3
members       3 10 11 12 16 

name          disk2
id            0xe1c9eb17
flags         0x00000005 blocked,join
change        member 3 joined 1 remove 0 failed 0 seq 1,1
members       3 11 12 


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