[LU-11106] Client crash on obd_zombid (ptlrpc_connection_put) in 2.10.4

Wed, 8 Aug 2018 18:13:04 +0000

Reporting this one just in case... no production, no data, just a POC on VMs...

We were testing the latest Lustre version with nodemap and several LNETs in a virtual cluster used just as POC and we hit a crash extremely similar to ~~LU-6991~~.

This VM is configured with 2 LNETs:

[root@tony-client4 ~]# cat /etc/modprobe.d/lustre.conf
options lnet networks=tcp1(enp0s9),tcp2(enp0s10)
[root@tony-client4 ~]# ip ad show dev enp0s9 | grep inet
    inet 172.16.1.34/24 brd 172.16.1.255 scope global noprefixroute enp0s9
    inet6 fe80::a00:27ff:fec9:f4cc/64 scope link
[root@tony-client4 ~]# ip ad show dev enp0s10 | grep inet
    inet 182.16.1.34/24 brd 182.16.1.255 scope global noprefixroute enp0s10
    inet6 fe80::a00:27ff:fe12:2cae/64 scope link

We were just testing the robustness of a multi-tenancy configuration by trying to mount the entire filesystem over an LNET(tcp0) not configured on this:

[root@tony-client4 ~]# mount -t lustre -o network=tcp0 172.16.1.11@tcp1:/tonyfs /lustre/tonyfs/general/

This triggered the crash attached in the image but which corresponds to ~~LU-6991~~. Unfortunately, I had not yet configured crashdump on this node.

If this ever gets reproduced I will try to provide the crashdump.

Whamcloud Community JIRA

[LU-11106] Client crash on obd_zombid (ptlrpc_connection_put) in 2.10.4