[Gluster-users] What does this error mean?

Burnash, James jburnash at knight.com
Mon Mar 21 18:16:39 UTC 2011 

A little more information:

>From the original (first peer node):
root at jc1letgfs5:/etc/glusterd/vols# gluster peer status
Number of Peers: 3

Hostname: jc1letgfs6
Uuid: cd590fad-022c-4b9a-97f5-3262080d772d
State: Peer in Cluster (Disconnected)

Hostname: jc1letgfs7
Uuid: c5f40de4-9bb1-47ad-93b6-d52c6689ee29
State: Peer in Cluster (Connected)

Hostname: jc1letgfs8
Uuid: 13f4ce3f-042e-4144-a76c-d2b1b91676bd
State: Peer in Cluster (Connected)


>From the problem node:
*** NOTE - only one Peer seen
root at jc1letgfs6:~# gluster peer status
Number of Peers: 1

Hostname: 10.20.72.156
Uuid: 95e1d79a-632a-4774-9d7e-a7234cb084ca
State: Peer in Cluster (Connected)


>From a different peer node:
root at jc1letgfs8:~# gluster peer status
Number of Peers: 3

Hostname: jc1letgfs6
Uuid: cd590fad-022c-4b9a-97f5-3262080d772d
State: Peer Rejected (Connected)

Hostname: jc1letgfs7
Uuid: c5f40de4-9bb1-47ad-93b6-d52c6689ee29
State: Peer in Cluster (Connected)

Hostname: 10.20.72.156
Uuid: 95e1d79a-632a-4774-9d7e-a7234cb084ca
State: Peer in Cluster (Connected)

-----Original Message-----
From: gluster-users-bounces at gluster.org [mailto:gluster-users-bounces at gluster.org] On Behalf Of Burnash, James
Sent: Monday, March 21, 2011 2:05 PM
To: Mohit Anchlia
Cc: gluster-users at gluster.org
Subject: Re: [Gluster-users] What does this error mean?

I did do this, and noting in particular stands out.

I'll exercise it some more, and see if we can get something that will at least point in the proper direction.

I suspect that another reboot of the affected machine will fix this condition - but it won't help me understand the root problem the next time this happens.

Thanks,

James

-----Original Message-----
From: Mohit Anchlia [mailto:mohitanchlia at gmail.com] 
Sent: Monday, March 21, 2011 12:40 PM
To: Burnash, James
Cc: gluster-users at gluster.org
Subject: Re: [Gluster-users] What does this error mean?

Can you turn on DEBUG and see if there is something that stands out?

On Mon, Mar 21, 2011 at 9:34 AM, Burnash, James <jburnash at knight.com> wrote:
> Does anybody have any clue as to why this is happening? The problem has persisted for several days now, but I can't find anything at all in the logs to possibly explain why this is so.
>
> -----Original Message-----
> From: gluster-users-bounces at gluster.org [mailto:gluster-users-bounces at gluster.org] On Behalf Of Burnash, James
> Sent: Wednesday, March 16, 2011 9:10 AM
> To: gluster-users at gluster.org
> Subject: [SPAM?] [Gluster-users] What does this error mean?
> Importance: Low
>
> Hello.
>
> After purposely crashing (via ' echo b>/proc/sysrq-trigger ) node jc1letgfs6 to test mirroring, even after the node has rebooted and is back online I am still seeing the statement "Disconnected" for that node when I execute the following command on the first storage node:
>
> root at jc1letgfs5:/etc/glusterd/vols# gluster peer status
> Number of Peers: 3
>
> Hostname: jc1letgfs6
> Uuid: cd590fad-022c-4b9a-97f5-3262080d772d
> State: Peer in Cluster (Disconnected)
>
> Hostname: jc1letgfs7
> Uuid: c5f40de4-9bb1-47ad-93b6-d52c6689ee29
> State: Peer in Cluster (Disconnected)
>
> Hostname: jc1letgfs8
> Uuid: 13f4ce3f-042e-4144-a76c-d2b1b91676bd
> State: Peer in Cluster (Connected)
>
> This is running on 4 servers with CentOS 5.5 (x86_64), GlusterFS 3.1.1
>
> Here is the volume info:
>
> # gluster volume info
>
> Volume Name: test-pfs-ro1
> Type: Distributed-Replicate
> Status: Started
> Number of Bricks: 4 x 2 = 8
> Transport-type: tcp
> Bricks:
> Brick1: jc1letgfs5:/export/read-only/g01
> Brick2: jc1letgfs6:/export/read-only/g01
> Brick3: jc1letgfs5:/export/read-only/g02
> Brick4: jc1letgfs6:/export/read-only/g02
> Brick5: jc1letgfs7:/export/read-only/g01
> Brick6: jc1letgfs8:/export/read-only/g01
> Brick7: jc1letgfs7:/export/read-only/g02
> Brick8: jc1letgfs8:/export/read-only/g02
> Options Reconfigured:
> performance.stat-prefetch: on
> performance.cache-size: 2GB
> network.ping-timeout: 10
>
> Even with this error, mirroring functions as expected, and the node is recognized and utilized, as can be seen in this log fragment from jc1letgfs5: /var/log/glusterfs/etc-glusterfs-glusterd.vol.log
>
> [2011-03-13 23:51:31.458329] E [socket.c:1656:socket_connect_finish] management: connection to 10.20.72.157:24007 failed (No route to ho
> st)
> [2011-03-13 23:53:49.42170] I [glusterd3_1-mops.c:172:glusterd3_1_friend_add_cbk] glusterd: Received ACC from uuid: cd590fad-022c-4b9a-9
> 7f5-3262080d772d, host: jc1letgfs6, port: 0
> [2011-03-13 23:53:49.42204] I [glusterd-utils.c:2062:glusterd_friend_find_by_uuid] glusterd: Friend found.. state: Peer in Cluster
> [2011-03-13 23:53:49.42320] I [glusterd-utils.c:2062:glusterd_friend_find_by_uuid] glusterd: Friend found.. state: Peer in Cluster
> [2011-03-13 23:53:49.42336] I [glusterd-handler.c:2267:glusterd_handle_friend_update] glusterd: Received friend update from uuid: cd590f
> ad-022c-4b9a-97f5-3262080d772d
> [2011-03-13 23:53:49.42359] I [glusterd-handler.c:2312:glusterd_handle_friend_update] : Received uuid: 95e1d79a-632a-4774-9d7e-a7234cb08
> 4ca, hostname:10.20.72.156
> [2011-03-13 23:53:49.42412] I [glusterd-handler.c:2315:glusterd_handle_friend_update] : Received my uuid as Friend
>
>
> Any pointers or help would be appreciated.
>
> James Burnash, Unix Engineering
>
>
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