Having a look at the new logs it shows that there are many different disks and disk systems in use. I see DASDs, that get partly unhappy, like: Dec 8 07:43:29 ilabg3 kernel: [651348.534047] dasd(eckd): I/O status report for device 0.0.248b: Dec 8 07:43:29 ilabg3 kernel: [651348.534047] dasd(eckd): in req: 000000006004d11c CC:00 FC:01 AC:00 SC:01 DS:00 CS:00 RC:0 Dec 8 07:43:29 ilabg3 kernel: [651348.534047] dasd(eckd): device 0.0.248b: Failing CCW: (null) Dec 8 07:43:29 ilabg3 kernel: [651348.534047] dasd(eckd): SORRY - NO VALID SENSE AVAILABLE Dec 8 07:43:29 ilabg3 kernel: [651348.534072] dasd(eckd): Related CP in req: 000000006004d11c Dec 8 07:43:29 ilabg3 kernel: [651348.534072] dasd(eckd): CCW 00000000584ecfe4: 2740000C 7FE86BC0 DAT: 18000000 00000e00 00000000 Dec 8 07:43:29 ilabg3 kernel: [651348.534072] dasd(eckd): CCW 00000000a235ae5d: 3E000200 7FEDD400 DAT: 00000000 00000000 00000000 (of course not related to the reported issue) I see 'local' scsi disks: scsi 3:0:12:0: Direct-Access IBM FlashSystem-9840 1600 PQ: 0 ANSI: 5 and I see XIV Storage as well.
I noticed a lot of 'Power-on or device reset's, as well as many 'LUN scan's and multipath path failures on a single day on that environment, like: sd 9:0:0:1: tag#58 Add. Sense: Power on, reset, or bus device reset occurred ... Dec 8 14:01:07 ilabg3 kernel: [ 2.127745] sd 3:0:0:0: scsi scan: REPORT LUN scan ... [458582.527232] device-mapper: multipath: Failing path 66:112. [458582.527234] print_req_error: I/O error, dev sdan, sector 15001576 That seems to be very odd and points to an issue with the SAN infrastructure and/or setup... The error messages that belong to the Ops seem to be known and points to a potential race discussed here: [RFC,1/1] libiscsi: Fix race between iscsi_xmit_task and iscsi_complete_task https://patchwork.kernel.org/patch/10501773/ Well, the situation above may even favor a race condition like this ... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1804149 Title: Kernel panic,Oops: 0004 ilc:3 [#1] SMP, iscsi_q_20 iscsi_xmitworker [libiscsi] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1804149/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
