[Ltsp-discuss] Problem with nbd_server in ltsp-pnp fat-client

[LTSP-PNP Adam]

Dear fellows,


I have DELL R160 server working with xUbuntu 16.04 and LTSP-pnp fat-clients.

From time to time, I have strange situation - on some PC's (pxe

terminals) I see that icons are disappears from desktop, and there is no
connction with home directory served by nbd in server. Ping is ok
beetwen client and server (I have tested). I turned on logging and I see
in syslog:

nbd_server[25520]: Read failed: Connection reset by peer

The clients logs to the server:
Sep 29 14:29:34 PC16 kernel: [ 82.864511] block nbd9: NBD_DISCONNECT
Sep 29 14:29:34 PC16 kernel: [ 82.865905] block nbd9: Receive control
failed (result -32)
Sep 29 14:29:41 PC03 kernel: [ 878.836660] traps: chrome[5939] general
protection ip:7fb8c04fc186 sp:7ffcc9d47490 error:0 in
Sep 29 14:29:42 PC18 kernel: [ 1191.184294] perf interrupt took too long
(5025 > 5000), lowering kernel.perf_event_max_sample_
Sep 29 14:29:49 PC03 kernel: [ 887.110768] traps: chrome[5955] general
protection ip:7efe800fd186 sp:7fff3c423fb0 error:0 in

Does anybody had something like that?

Adam

[Alkis Georgopoulos]

1) The home directory is not served by nbd, but by sshfs.
2) The nbd9 disconnect messages are normal; the client connects to check
if there's a new image available, and then continues.

Search elsewhere for your issue, not in nbd.
For example, the chrome general protection error is more worrying. :)

Post by LTSP-PNP Adam
Dear fellows,
I have DELL R160 server working with xUbuntu 16.04 and LTSP-pnp fat-clients.

From time to time, I have strange situation - on some PC's (pxe

terminals) I see that icons are disappears from desktop, and there is no
connction with home directory served by nbd in server. Ping is ok
beetwen client and server (I have tested). I turned on logging and I see
nbd_server[25520]: Read failed: Connection reset by peer
Sep 29 14:29:34 PC16 kernel: [ 82.864511] block nbd9: NBD_DISCONNECT
Sep 29 14:29:34 PC16 kernel: [ 82.865905] block nbd9: Receive control
failed (result -32)
Sep 29 14:29:41 PC03 kernel: [ 878.836660] traps: chrome[5939] general
protection ip:7fb8c04fc186 sp:7ffcc9d47490 error:0 in
Sep 29 14:29:42 PC18 kernel: [ 1191.184294] perf interrupt took too long
(5025 > 5000), lowering kernel.perf_event_max_sample_
Sep 29 14:29:49 PC03 kernel: [ 887.110768] traps: chrome[5955] general
protection ip:7efe800fd186 sp:7fff3c423fb0 error:0 in
Does anybody had something like that?
Adam

[LTSP-PNP Adam]

Post by Alkis Georgopoulos
1) The home directory is not served by nbd, but by sshfs.

Alkis, thank you for information - I forgot about it.
Maybe you know any reason, why it is happening?
I installed 2 classrooms with ltsp-pnp in Poland last month, in one
everything is OK, in second I have problems. And in next week I will
install 3rd class....

Adam