Re: Unable to make HA work; mounts hang on remote node reboot

[CJ Baar <gsml@xxxxxxxxxx>]

Thanks, Corey. At the moment I only have two nodes to play with. If I am able to add third, would you recommend using “replicate 3” on the volume, or is that overkill?

I understand what you mean with the quorum, but for my purposes, it would be nice to be able to say “you may not be able to write during a node failure, but you can still read.”

—CJ

On Apr 17, 2015, at 6:18 AM, Corey Kovacs <corey.kovacs@xxxxxxxxx> wrote:

Typically you need to meet a quorum requirement to run just about any cluster.  By definition,  two nodes doesn't make a good cluster. A third node would let you start with just two since that would allow you to meet quorum. Can you add a third node to at least test?

Corey

On Apr 16, 2015 6:52 PM, "CJ Baar" <gsml@xxxxxxxxxx> wrote:

I appreciate the info. I have tried adjust the ping-timeout setting, and it has seems to have no effect. The whole system hangs for 45+ seconds, which is about what it takes the second node to reboot, no matter what the value of ping-timeout is.  The output of the mnt-log is below.  It shows the adjust value I am currently testing (30s), but the system still hangs for longer than that.

Also, I have realized that the problem is deeper than I originally thought.  It’s not just the mount that is hanging when a node reboots… it appears to be the entire system.  I cannot use my SSH connection, no matter where I am in the system, and services such as httpd become unresponsive.  I can ping the “surviving” system, but other than that it appears pretty unusable.  This is a major drawback to using gluster.  I can’t afford to lost two entire systems if one dies.

[2015-04-16 22:59:21.281365] C [rpc-clnt-ping.c:109:rpc_clnt_ping_timer_expired] 0-common-client-0: server 172.31.64.200:49152 has not responded in the last 30 seconds, disconnecting.

[2015-04-16 22:59:21.281560] E [rpc-clnt.c:362:saved_frames_unwind] (--> /usr/lib64/libglusterfs.so.0(_gf_log_callingfn+0x1e0)[0x7fce96450550] (--> /usr/lib64/libgfrpc.so.0(saved_frames_unwind+0x1e7)[0x7fce96225787] (--> /usr/lib64/libgfrpc.so.0(saved_frames_destroy+0xe)[0x7fce9622589e] (--> /usr/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup+0x91)[0x7fce96225951] (--> /usr/lib64/libgfrpc.so.0(rpc_clnt_notify+0x15f)[0x7fce96225f1f] ))))) 0-common-client-0: forced unwinding frame type(GlusterFS 3.3) op(LOOKUP(27)) called at 2015-04-16 22:58:45.830962 (xid=0x6d)

[2015-04-16 22:59:21.281588] W [client-rpc-fops.c:2766:client3_3_lookup_cbk] 0-common-client-0: remote operation failed: Transport endpoint is not connected. Path: / (00000000-0000-0000-0000-000000000001)

[2015-04-16 22:59:21.281788] E [rpc-clnt.c:362:saved_frames_unwind] (--> /usr/lib64/libglusterfs.so.0(_gf_log_callingfn+0x1e0)[0x7fce96450550] (--> /usr/lib64/libgfrpc.so.0(saved_frames_unwind+0x1e7)[0x7fce96225787] (--> /usr/lib64/libgfrpc.so.0(saved_frames_destroy+0xe)[0x7fce9622589e] (--> /usr/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup+0x91)[0x7fce96225951] (--> /usr/lib64/libgfrpc.so.0(rpc_clnt_notify+0x15f)[0x7fce96225f1f] ))))) 0-common-client-0: forced unwinding frame type(GF-DUMP) op(NULL(2)) called at 2015-04-16 22:58:51.277528 (xid=0x6e)

[2015-04-16 22:59:21.281806] W [rpc-clnt-ping.c:154:rpc_clnt_ping_cbk] 0-common-client-0: socket disconnected

[2015-04-16 22:59:21.281816] I [client.c:2215:client_rpc_notify] 0-common-client-0: disconnected from common-client-0. Client process will keep trying to connect to glusterd until brick's port is available

[2015-04-16 22:59:21.283637] I [socket.c:3292:socket_submit_request] 0-common-client-0: not connected (priv->connected = 0)

[2015-04-16 22:59:21.283663] W [rpc-clnt.c:1562:rpc_clnt_submit] 0-common-client-0: failed to submit rpc-request (XID: 0x6f Program: GlusterFS 3.3, ProgVers: 330, Proc: 27) to rpc-transport (common-client-0)

[2015-04-16 22:59:21.283674] W [client-rpc-fops.c:2766:client3_3_lookup_cbk] 0-common-client-0: remote operation failed: Transport endpoint is not connected. Path: /src (63fc077b-869d-4928-8819-a79cc5c5ffa6)

[2015-04-16 22:59:21.284219] W [client-rpc-fops.c:2766:client3_3_lookup_cbk] 0-common-client-0: remote operation failed: Transport endpoint is not connected. Path: (null) (00000000-0000-0000-0000-000000000000)

[2015-04-16 22:59:52.322952] E [client-handshake.c:1496:client_query_portmap_cbk] 0-common-client-0: failed to get the port number for [root@cfm-c glusterfs]#

—CJ

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