Hi, all:
We had a two-node gluster cluster (replicated, 2 replicas) that recently we
added two more node/bricks to and performed a rebalance upon, thus making it a
distributed-replicate volume. Since doing so, we now see for any NFS access,
read or write, a “Remote I/O error” whenever performing any operation (stat,
read, write, whatever) although the operation appears to in fact succeed.
I don’t actually see any information in the gluster logs that would assist.
The bricks are backstored on ZFS vols.
Any hints? It’s Gluster 3.6.2 on Ubuntu Trusty.
Clients using glusterfs throw some concerning errors as well - see bottom below
for examples.
Thanks,
-t
Status of volume: edc1
Gluster process Port Online Pid
------------------------------------------------------------------------------
Brick fs4:/fs4/edc1 49154 Y 2435
Brick fs5:/fs5/edc1 49154 Y 2328
Brick hdfs5:/hdfs5/edc1 49152 Y 26725
Brick hdfs6:/hdfs6/edc1 49152 Y 4994
NFS Server on localhost 2049 Y 31503
Self-heal Daemon on localhost N/A Y 31510
NFS Server on 10.54.90.13 2049 Y 16310
Self-heal Daemon on 10.54.90.13 N/A Y 16317
NFS Server on hdfs6 2049 Y 5006
Self-heal Daemon on hdfs6 N/A Y 5013
NFS Server on hdfs5 2049 Y 26737
Self-heal Daemon on hdfs5 N/A Y 26744
Task Status of Volume edc1
------------------------------------------------------------------------------
Task : Rebalance
ID : b3095ab2-c428-4681-b545-36941a8816f6
Status : completed
Volume Name: edc1
Type: Distributed-Replicate
Volume ID: 2f6b5804-e2d8-4400-93e9-b172952b1aae
Status: Started
Number of Bricks: 2 x 2 = 4
Transport-type: tcp
Bricks:
Brick1: fs4:/fs4/edc1
Brick2: fs5:/fs5/edc1
Brick3: hdfs5:/hdfs5/edc1
Brick4: hdfs6:/hdfs6/edc1
Options Reconfigured:
performance.cache-size: 1GB
performance.write-behind-window-size: 1GB
volume edc1-client-0
type protocol/client
option send-gids true
option transport-type tcp
option remote-subvolume /fs4/edc1
option remote-host fs4
option ping-timeout 42
end-volume
volume edc1-client-1
type protocol/client
option send-gids true
option transport-type tcp
option remote-subvolume /fs5/edc1
option remote-host fs5
option ping-timeout 42
end-volume
volume edc1-client-2
type protocol/client
option send-gids true
option transport-type tcp
option remote-subvolume /hdfs5/edc1
option remote-host hdfs5
option ping-timeout 42
end-volume
volume edc1-client-3
type protocol/client
option send-gids true
option transport-type tcp
option remote-subvolume /hdfs6/edc1
option remote-host hdfs6
option ping-timeout 42
end-volume
volume edc1-replicate-0
type cluster/replicate
subvolumes edc1-client-0 edc1-client-1
end-volume
volume edc1-replicate-1
type cluster/replicate
subvolumes edc1-client-2 edc1-client-3
end-volume
volume edc1-dht
type cluster/distribute
subvolumes edc1-replicate-0 edc1-replicate-1
end-volume
volume edc1-write-behind
type performance/write-behind
option cache-size 1GB
subvolumes edc1-dht
end-volume
volume edc1-read-ahead
type performance/read-ahead
subvolumes edc1-write-behind
end-volume
volume edc1-io-cache
type performance/io-cache
option cache-size 1GB
subvolumes edc1-read-ahead
end-volume
volume edc1-quick-read
type performance/quick-read
option cache-size 1GB
subvolumes edc1-io-cache
end-volume
volume edc1-open-behind
type performance/open-behind
subvolumes edc1-quick-read
end-volume
volume edc1-md-cache
type performance/md-cache
subvolumes edc1-open-behind
end-volume
volume edc1
type debug/io-stats
option count-fop-hits off
option latency-measurement off
subvolumes edc1-md-cache
end-volume
[2015-02-26 22:13:07.473839] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:07.474890] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:07.475891] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:07.531037] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:07.532210] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:07.533238] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:08.157109] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.pam_environment missing on subvol
edc1-replicate-0
[2015-02-26 22:13:08.158555] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.pam_environment missing on subvol
edc1-replicate-0
[2015-02-26 22:13:08.200168] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.ssh missing on subvol edc1-replicate-0
[2015-02-26 22:13:08.252177] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:08.253435] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:08.254591] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:18.356816] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:18.358082] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:18.359225] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:23.915730] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.pam_environment missing on subvol
edc1-replicate-0
[2015-02-26 22:13:23.916856] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.pam_environment missing on subvol
edc1-replicate-0
[2015-02-26 22:13:23.968891] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.ssh missing on subvol edc1-replicate-0
[2015-02-26 22:13:24.024415] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:24.025687] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
[2015-02-26 22:13:24.026904] I [dht-common.c:1822:dht_lookup_cbk] 0-edc1-dht:
Entry /cc/aspera/sandbox/mwt-wea/.local missing on subvol edc1-replicate-0
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