On Thu, May 11, 2017 at 1:42 PM, Robert Kudyba <rkudyba@xxxxxxxxxxx> wrote: >>> Could you provide a network trace of the isssue happening? You can add a >>> new bug report on bugzilla.samba.org in the cifsVFS/kernel fs section >>> and attach the trace there. > >> I submitted a bug. Seems to happen every night. Cron starts at 11:30 PM. Error happens around 1:25 AM. Here are some logs in context as well as a tcpdump—drobo-ds is the NAS backup device. I created a large (3GB) tcpdump during the backup but it’s way too big to upload. Could this be bufferbloat? This suggests that the Drobo is simply going off into the weeds somewhere. Do you have enough storage on it. They will insert write delays when storage is low, but I didn't think they would insert 120 seconds. Also, if you run the capture through tshark you can get a text listing of the requests that might allow you to find the location where the Drobo stops responding and then you can extract the 100-1000 packets around that point. tshark -r whatever-your-capture-is.pcap. >> May 11 01:22:23 ourserver kernel: CIFS VFS: Server droboh has not responded in 120 seconds. Reconnecting... >> May 11 01:23:40 ourserver kernel: CIFS VFS: sends on sock ffff9f2881408c80 stuck for 15 seconds >> May 11 01:23:40 ourserver kernel: CIFS VFS: Error -11 sending data on socket to server >> May 11 01:24:24 ourserver kernel: CIFS VFS: sends on sock ffff9f2881408c80 stuck for 15 seconds >> May 11 01:24:24 ourserver kernel: CIFS VFS: Error -11 sending data on socket to server >> May 11 01:25:00 ourserver kernel: CIFS VFS: sends on sock ffff9f2881408c80 stuck for 15 seconds >> May 11 01:25:00 ourserver kernel: CIFS VFS: Error -11 sending data on socket to server >> May 11 01:25:16 ourserver kernel: CIFS VFS: sends on sock ffff9f2881408c80 stuck for 15 seconds >> May 11 01:25:16 ourserver kernel: CIFS VFS: Error -11 sending data on socket to server >> May 11 01:25:49 ourserver kernel: CIFS VFS: sends on sock ffff9f2881408c80 stuck for 15 seconds >> May 11 01:25:49 ourserver kernel: CIFS VFS: Error -11 sending data on socket to server >> >> reading from file capture_eth1.pcap, link-type EN10MB (Ethernet) >> 01:29:10.445882 IP ourserver.uuidgen > fileserver.nfs: Flags [P.], seq 2359428476:2359428700, ack 4223248510, win 1444, options [nop,nop,TS val 1979978735 ecr 775533219], length 224: NFS request xid 2016398399 220 getattr fh 0,2/53 >> 01:29:10.446331 IP fileserver.nfs > ourserver.uuidgen: Flags [P.], seq 1:173, ack 224, win 5204, options [nop,nop,TS val 775535659 ecr 1979978735], length 172: NFS reply xid 2016398399 reply ok 168 getattr NON 4 ids 0/1730480217 sz 1861894709 >> 01:29:10.446378 IP ourserver.uuidgen > fileserver.nfs: Flags [.], ack 173, win 1444, options [nop,nop,TS val 1979978736 ecr 775535659], length 0 >> 01:29:10.446466 IP ourserver.uuidgen > fileserver.nfs: Flags [P.], seq 224:568, ack 173, win 1444, options [nop,nop,TS val 1979978736 ecr 775535659], length 344: NFS request xid 2033175615 340 getattr fh 0,2/53 >> 01:29:10.447034 IP fileserver.nfs > ourserver.uuidgen: Flags [P.], seq 173:537, ack 568, win 5204, options [nop,nop,TS val 775535660 ecr 1979978736], length 364: NFS reply xid 2033175615 reply ok 360 getattr NON 6 ids 0/1730480217 sz 1861894709 >> 01:29:10.447346 IP ourserver.uuidgen > fileserver.nfs: Flags [P.], seq 568:836, ack 537, win 1444, options [nop,nop,TS val 1979978737 ecr 775535660], length 268: NFS request xid 2049952831 264 getattr fh 0,2/53 >> 01:29:10.465786 IP fileserver.nfs > ourserver.uuidgen: Flags [P.], seq 537:805, ack 836, win 5204, options [nop,nop,TS val 775535679 ecr 1979978737], length 268: NFS reply xid 2049952831 reply ok 264 getattr NON 4 ids 0/1730480217 sz 1861894709 >> 01:29:13.964676 IP drobo-ds > ourserver.42582: Flags [.], ack 3571070888, win 26508, options [nop,nop,TS val 616097295 ecr 1073740628], length 0 >> 01:29:13.964780 IP drobo-ds > ourserver.42582: Flags [.], ack 2897, win 26508, options [nop,nop,TS val 616097295 ecr 1073740628], length 0 >> 01:29:13.965029 IP drobo-ds > ourserver.42582: Flags [.], ack 5793, win 26508, options [nop,nop,TS val 616097295 ecr 1073740628], length 0 >> 01:29:13.965155 IP drobo-ds > ourserver.42582: Flags [.], ack 8689, win 26508, options [nop,nop,TS val 616097295 ecr 1073740629], length 0 >> 01:29:13.965176 IP ourserver.42582 > drobo-ds: Flags [.], seq 101361:115841, ack 0, win 321, options [nop,nop,TS val 1073740637 ecr 616097295], length 14480 SMB-over-TCP packet:(raw data or continuation?) >> >> 01:29:13.965397 IP drobo-ds > ourserver.42582: Flags [.], ack 11585, win 26421, options [nop,nop,TS val 616097295 ecr 1073740630], length 0 >> 01:29:13.965418 IP ourserver.42582 > drobo-ds: Flags [.], seq 115841:118737, ack 0, win 321, options [nop,nop,TS val 1073740638 ecr 616097295], length 2896 SMB-over-TCP packet:(raw data or continuation?) >> >> 01:29:13.966364 IP drobo-ds > ourserver.42582: Flags [P.], seq 0:51, ack 18825, win 25986, options [nop,nop,TS val 616097295 ecr 1073740630], length 51 SMB PACKET: SMBwriteX (REPLY) >> >> 01:29:13.966386 IP drobo-ds > ourserver.42582: Flags [.], ack 21721, win 26508, options [nop,nop,TS val 616097295 ecr 1073740630], length 0 >> 01:29:13.966416 IP ourserver.42582 > drobo-ds: Flags [.], seq 118737:125977, ack 51, win 321, options [nop,nop,TS val 1073740639 ecr 616097295], length 7240 SMB-over-TCP packet:(raw data or continuation?) >> >> 01:29:13.966658 IP drobo-ds > ourserver.42582: Flags [.], ack 24617, win 26508, options [nop,nop,TS val 616097295 ecr 1073740631], length 0 >> 01:29:13.966783 IP drobo-ds > ourserver.42582: Flags [.], ack 27513, win 26508, options [nop,nop,TS val 616097295 ecr 1073740631], length 0 >> 01:29:13.967054 IP drobo-ds > ourserver.42582: Flags [.], ack 30409, win 26508, options [nop,nop,TS val 616097295 ecr 1073740631], length 0 >> 01:29:13.967072 IP ourserver.42582 > drobo-ds: Flags [P.], seq 125977:137561, ack 51, win 321, options [nop,nop,TS val 1073740639 ecr 616097295], length 11584 SMB-over-TCP packet:(raw data or continuation?) >> >> 01:29:13.967408 IP drobo-ds > ourserver.42582: Flags [.], ack 33305, win 26508, options [nop,nop,TS val 616097295 ecr 1073740631], length 0 >> 01:29:13.968436 IP drobo-ds > ourserver.42582: Flags [.], ack 44889, win 26508, options [nop,nop,TS val 616097296 ecr 1073740632], length 0 >> 01:29:13.968460 IP ourserver.42582 > drobo-ds: Flags [.], seq 140457:152041, ack 51, win 321, options [nop,nop,TS val 1073740641 ecr 616097296], length 11584 SMB-over-TCP packet:(raw data or continuation?) >> >> 01:29:13.968515 IP drobo-ds > ourserver.42582: Flags [.], ack 47785, win 26508, options [nop,nop,TS val 616097296 ecr 1073740634], length 0 >> 01:29:13.968782 IP drobo-ds > ourserver.42582: Flags [.], ack 50681, win 26508, options [nop,nop,TS val 616097296 ecr 1073740634], length 0 >> 01:29:13.969224 IP drobo-ds > ourserver.42582: Flags [.], ack 53577, win 26508, options [nop,nop,TS val 616097296 ecr 1073740634], length 0 >> 01:29:13.969242 IP ourserver.42582 > drobo-ds: Flags [.], seq 152041:160729, ack 51, win 321, options [nop,nop,TS val 1073740642 ecr 616097296], length 8688 SMB-over-TCP packet:(raw data or continuation?) >> >> > > -- > To unsubscribe from this list: send the line "unsubscribe linux-cifs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Regards, Richard Sharpe (何以解憂？唯有杜康。--曹操) -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
