Bug 1202218

Description of problem:
=======================
In a 1x(8+4) disperse volume, there are input/output errors on nfs mount after 2 bricks were brought down and the gluster volume is started by force. The mount point goes into state state and takes long time to recover.


Version-Release number of selected component (if applicable):
==============================================================
[root@vertigo ~]# gluster --version
glusterfs 3.7dev built on Mar 12 2015 01:40:59
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.

How reproducible:
=================
100%

Steps to Reproduce:
1. create a 1x(8+4) disperse volume.
2. NFS mount on the client and start creating files/directories with mkdir and dd
3. Now, bring down 2 of the bricks 
4. Wait for some time and let IO run. 
5. Start the gluster volume with force option from any of the server.
 

Actual results:
================
input/output errors on nfs mount

Expected results:
=================
No errors should be seen and IO should resume as normal

Gluster volume options:
=======================

[root@vertigo ~]# gluster v get testvol all
Option                                  Value                                   
------                                  -----                                   
cluster.lookup-unhashed                 on                                      
cluster.min-free-disk                   10%                                     
cluster.min-free-inodes                 5%                                      
cluster.rebalance-stats                 off                                     
cluster.subvols-per-directory           (null)                                  
cluster.readdir-optimize                off                                     
cluster.rsync-hash-regex                (null)                                  
cluster.extra-hash-regex                (null)                                  
cluster.dht-xattr-name                  trusted.glusterfs.dht                   
cluster.randomize-hash-range-by-gfid    off                                     
cluster.local-volume-name               (null)                                  
cluster.weighted-rebalance              on                                      
cluster.switch-pattern                  (null)                                  
cluster.entry-change-log                on                                      
cluster.read-subvolume                  (null)                                  
cluster.read-subvolume-index            -1                                      
cluster.read-hash-mode                  1                                       
cluster.background-self-heal-count      16                                      
cluster.metadata-self-heal              on                                      
cluster.data-self-heal                  on                                      
cluster.entry-self-heal                 on                                      
cluster.self-heal-daemon                on                                      
cluster.heal-timeout                    600                                     
cluster.self-heal-window-size           1                                       
cluster.data-change-log                 on                                      
cluster.metadata-change-log             on                                      
cluster.data-self-heal-algorithm        (null)                                  
cluster.eager-lock                      on                                      
cluster.quorum-type                     none                                    
cluster.quorum-count                    (null)                                  
cluster.choose-local                    true                                    
cluster.self-heal-readdir-size          1KB                                     
cluster.post-op-delay-secs              1                                       
cluster.ensure-durability               on                                      
cluster.stripe-block-size               128KB                                   
cluster.stripe-coalesce                 true                                    
diagnostics.latency-measurement         off                                     
diagnostics.dump-fd-stats               off                                     
diagnostics.count-fop-hits              off                                     
diagnostics.brick-log-level             INFO                                    
diagnostics.client-log-level            INFO                                    
diagnostics.brick-sys-log-level         CRITICAL                                
diagnostics.client-sys-log-level        CRITICAL                                
diagnostics.brick-logger                (null)                                  
diagnostics.client-logger               (null)                                  
diagnostics.brick-log-format            (null)                                  
diagnostics.client-log-format           (null)                                  
diagnostics.brick-log-buf-size          5                                       
diagnostics.client-log-buf-size         5                                       
diagnostics.brick-log-flush-timeout     120                                     
diagnostics.client-log-flush-timeout    120                                     
performance.cache-max-file-size         0                                       
performance.cache-min-file-size         0                                       
performance.cache-refresh-timeout       1                                       
performance.cache-priority                                                      
performance.cache-size                  32MB                                    
performance.io-thread-count             16                                      
performance.high-prio-threads           16                                      
performance.normal-prio-threads         16                                      
performance.low-prio-threads            16                                      
performance.least-prio-threads          1                                       
performance.enable-least-priority       on                                      
performance.least-rate-limit            0                                       
performance.cache-size                  128MB                                   
performance.flush-behind                on                                      
performance.nfs.flush-behind            on                                      
performance.write-behind-window-size    1MB                                     
performance.nfs.write-behind-window-size1MB                                     
performance.strict-o-direct             off                                     
performance.nfs.strict-o-direct         off                                     
performance.strict-write-ordering       off                                     
performance.nfs.strict-write-ordering   off                                     
performance.lazy-open                   yes                                     
performance.read-after-open             no                                      
performance.read-ahead-page-count       4                                       
performance.md-cache-timeout            1                                       
features.encryption                     off                                     
encryption.master-key                   (null)                                  
encryption.data-key-size                256                                     
encryption.block-size                   4096                                    
network.frame-timeout                   1800                                    
network.ping-timeout                    42                                      
network.tcp-window-size                 (null)                                  
features.lock-heal                      off                                     
features.grace-timeout                  10                                      
network.remote-dio                      disable                                 
client.event-threads                    2                                       
network.tcp-window-size                 (null)                                  
network.inode-lru-limit                 16384                                   
auth.allow                              *                                       
auth.reject                             (null)                                  
transport.keepalive                     (null)                                  
server.allow-insecure                   (null)                                  
server.root-squash                      off                                     
server.anonuid                          65534                                   
server.anongid                          65534                                   
server.statedump-path                   /var/run/gluster                        
server.outstanding-rpc-limit            64                                      
features.lock-heal                      off                                     
features.grace-timeout                  (null)                                  
server.ssl                              (null)                                  
auth.ssl-allow                          *                                       
server.manage-gids                      off                                     
client.send-gids                        on                                      
server.gid-timeout                      2                                       
server.own-thread                       (null)                                  
server.event-threads                    2                                       
performance.write-behind                on                                      
performance.read-ahead                  on                                      
performance.readdir-ahead               off                                     
performance.io-cache                    on                                      
performance.quick-read                  on                                      
performance.open-behind                 on                                      
performance.stat-prefetch               on                                      
performance.client-io-threads           off                                     
performance.nfs.write-behind            on                                      
performance.nfs.read-ahead              off                                     
performance.nfs.io-cache                off                                     
performance.nfs.quick-read              off                                     
performance.nfs.stat-prefetch           off                                     
performance.nfs.io-threads              off                                     
performance.force-readdirp              true                                    
features.file-snapshot                  off                                     
features.uss                            on                                      
features.snapshot-directory             .snaps                                  
features.show-snapshot-directory        off                                     
network.compression                     off                                     
network.compression.window-size         -15                                     
network.compression.mem-level           8                                       
network.compression.min-size            0                                       
network.compression.compression-level   -1                                      
network.compression.debug               false                                   
features.limit-usage                    (null)                                  
features.quota-timeout                  0                                       
features.default-soft-limit             80%                                     
features.soft-timeout                   60                                      
features.hard-timeout                   5                                       
features.alert-time                     86400                                   
features.quota-deem-statfs              off                                     
geo-replication.indexing                off                                     
geo-replication.indexing                off                                     
geo-replication.ignore-pid-check        off                                     
geo-replication.ignore-pid-check        off                                     
features.quota                          on                                      
debug.trace                             off                                     
debug.log-history                       no                                      
debug.log-file                          no                                      
debug.exclude-ops                       (null)                                  
debug.include-ops                       (null)                                  
debug.error-gen                         off                                     
debug.error-failure                     (null)                                  
debug.error-number                      (null)                                  
debug.random-failure                    off                                     
debug.error-fops                        (null)                                  
nfs.enable-ino32                        no                                      
nfs.mem-factor                          15                                      
nfs.export-dirs                         on                                      
nfs.export-volumes                      on                                      
nfs.addr-namelookup                     off                                     
nfs.dynamic-volumes                     off                                     
nfs.register-with-portmap               on                                      
nfs.outstanding-rpc-limit               16                                      
nfs.port                                2049                                    
nfs.rpc-auth-unix                       on                                      
nfs.rpc-auth-null                       on                                      
nfs.rpc-auth-allow                      all                                     
nfs.rpc-auth-reject                     none                                    
nfs.ports-insecure                      off                                     
nfs.trusted-sync                        off                                     
nfs.trusted-write                       off                                     
nfs.volume-access                       read-write                              
nfs.export-dir                                                                  
nfs.disable                             false                                   
nfs.nlm                                 on                                      
nfs.acl                                 on                                      
nfs.mount-udp                           off                                     
nfs.mount-rmtab                         /var/lib/glusterd/nfs/rmtab             
nfs.rpc-statd                           /sbin/rpc.statd                         
nfs.server-aux-gids                     off                                     
nfs.drc                                 off                                     
nfs.drc-size                            0x20000                                 
nfs.read-size                           (1 * 1048576ULL)                        
nfs.write-size                          (1 * 1048576ULL)                        
nfs.readdir-size                        (1 * 1048576ULL)                        
features.read-only                      off                                     
features.worm                           off                                     
storage.linux-aio                       off                                     
storage.batch-fsync-mode                reverse-fsync                           
storage.batch-fsync-delay-usec          0                                       
storage.owner-uid                       -1                                      
storage.owner-gid                       -1                                      
storage.node-uuid-pathinfo              off                                     
storage.health-check-interval           30                                      
storage.build-pgfid                     off                                     
storage.bd-aio                          off                                     
cluster.server-quorum-type              off                                     
cluster.server-quorum-ratio             0                                       
changelog.changelog                     off                                     
changelog.changelog-dir                 (null)                                  
changelog.encoding                      ascii                                   
changelog.rollover-time                 15                                      
changelog.fsync-interval                5                                       
changelog.changelog-barrier-timeout     120                                     
features.barrier                        disable                                 
features.barrier-timeout                120                                     
locks.trace                             (null)                                  
cluster.disperse-self-heal-daemon       enable                                  
cluster.quorum-reads                    no                                      
client.bind-insecure                    (null)                                  
[root@vertigo ~]# 


Gluster volume status:
=======================
[root@vertigo ~]# gluster v status
Status of volume: testvol
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick vertigo:/rhs/brick1/b1                49152     0          Y       18310
Brick ninja:/rhs/brick1/b1                  49152     0          Y       14315
Brick vertigo:/rhs/brick2/b2                49153     0          Y       18323
Brick ninja:/rhs/brick2/b2                  49153     0          Y       14328
Brick vertigo:/rhs/brick3/b3                49154     0          Y       19653
Brick ninja:/rhs/brick3/b3                  49154     0          Y       14341
Brick vertigo:/rhs/brick4/b4                49155     0          Y       19666
Brick ninja:/rhs/brick4/b4                  49155     0          Y       14354
Brick vertigo:/rhs/brick1/b1-1              49156     0          Y       19679
Brick ninja:/rhs/brick1/b1-1                49156     0          Y       14367
Brick vertigo:/rhs/brick2/b2-1              49157     0          Y       19692
Brick ninja:/rhs/brick2/b2-1                49157     0          Y       14380
Snapshot Daemon on localhost                49158     0          Y       21305
NFS Server on localhost                     2049      0          Y       18337
Quota Daemon on localhost                   N/A       N/A        Y       18358
Snapshot Daemon on ninja                    49158     0          Y       15763
NFS Server on ninja                         2049      0          Y       16224
Quota Daemon on ninja                       N/A       N/A        Y       16245
 
Task Status of Volume testvol
------------------------------------------------------------------------------
There are no active volume tasks
 
[root@vertigo ~]# 


Gluster volume info:
====================

[root@vertigo ~]# gluster v info
 
Volume Name: testvol
Type: Disperse
Volume ID: 7393260c-51d1-4dca-8fc8-e1f5ad6fee14
Status: Started
Number of Bricks: 1 x (8 + 4) = 12
Transport-type: tcp
Bricks:
Brick1: vertigo:/rhs/brick1/b1
Brick2: ninja:/rhs/brick1/b1
Brick3: vertigo:/rhs/brick2/b2
Brick4: ninja:/rhs/brick2/b2
Brick5: vertigo:/rhs/brick3/b3
Brick6: ninja:/rhs/brick3/b3
Brick7: vertigo:/rhs/brick4/b4
Brick8: ninja:/rhs/brick4/b4
Brick9: vertigo:/rhs/brick1/b1-1
Brick10: ninja:/rhs/brick1/b1-1
Brick11: vertigo:/rhs/brick2/b2-1
Brick12: ninja:/rhs/brick2/b2-1
Options Reconfigured:
features.uss: on
client.event-threads: 2
server.event-threads: 2
features.quota: on
[root@vertigo ~]# 


Additional info:
================
Attaching the sosreports of the server nodes.