[Gluster-users] RDMA Client Hang Problem

[Raghavendra Gowdappa]

Is infiniband itself working fine? You can run tools like ibv_rc_pingpong
to find out.

On Wed, Apr 25, 2018 at 12:23 PM, Necati E. SISECI <siseci at gmail.com> wrote:

> Dear Gluster-Users,
>
> I am experiencing RDMA problems.
>
> I have installed Ubuntu 16.04.4 running with 4.15.0-13-generic kernel,
> MLNX_OFED_LINUX-4.3-1.0.1.0-ubuntu16.04-x86_64 to 4 different servers.
> All of them has Mellanox ConnectX-4 LX dual port NICs. These four servers
> are connected via Mellanox SN2100 Switch.
>
> I have installed GlusterFS Server v3.10 (from Ubuntu PPA) to 3 servers.
> These 3 boxes are running as gluster cluster. Additionally, I have
> installed Glusterfs Client to the last one.
>
> I have created Gluster Volume with this command:
>
> # gluster volume create db transport rdma replica 3 arbiter 1
> gluster1:/storage/db/ gluster2:/storage/db/ cinder:/storage/db force
>
> (network.ping-timeout is 3)
>
> Then I have mounted this volume using mount command below.
>
> mount -t glusterfs -o transport=rdma gluster1:/db /db
>
> After mountings "/db", I can access the files.
>
> The problem is, when I reboot one of the cluster nodes, fuse client gives
> this error below and hangs.
>
> [2018-04-17 07:42:55.506422] W [MSGID: 103070] [rdma.c:4284:gf_rdma_handle_failed_send_completion]
> 0-rpc-transport/rdma: *send work request on `mlx5_0' returned error
> wc.status = 5, wc.vendor_err = 245, post->buf = 0x7f8b92016000, wc.byte_len
> = 0, post->reused = 135*
>
> When I change transport mode from rdma to tcp, fuse client works well. No
> hangs.
>
> I also tried Gluster 3.8, 3.10, 4.0.0 and 4.0.1 (from Ubuntu PPAs) on
> Ubuntu 16.04.4 and Centos 7.4. But results were the same.
>
> Thank you.
> Necati.
>
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>
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