Gluster bricks are offline and errors in logs

I have resolved the issue with the help of JoeJulian from Freenode#Gluster. When I examined process list, there were some processes using old configuration: /usr/sbin/glusterfsd -s localhost --volfile-id storage.11.111.111.11.storage-2b.... After executing this command:

killall glusterfsd ; killall -9 glusterfsd ; killall glusterd ; glusterd

Situation is resolved - all bricks are online:

# gluster volume status
Status of volume: storage
Gluster process                     Port    Online  Pid
------------------------------------------------------------------------------
Brick gluster-1a:/storage/1a        24009   Y   17302
Brick gluster-1b:/storage/1b        24009   Y   12188
Brick gluster-2a:/storage/2a        24009   Y   10863
Brick gluster-2b:/storage/2b        24009   Y   13486
Brick gluster-1a:/storage/3a        24011   Y   17308
Brick gluster-1b:/storage/3b        24011   Y   12194
Brick gluster-2a:/storage/4a        24011   Y   10869
Brick gluster-2b:/storage/4b        24011   Y   13492
NFS Server on localhost                 38467   Y   17314
Self-heal Daemon on localhost               N/A Y   17320
NFS Server on gluster-2a            38467   Y   10879
Self-heal Daemon on gluster-2a      N/A Y   10885
NFS Server on gluster-2b            38467   Y   13503
Self-heal Daemon on gluster-2b      N/A Y   13509
NFS Server on gluster-1b            38467   Y   12200
Self-heal Daemon on gluster-1b      N/A Y   12206