On Fri, Dec 09, 2011 at 12:57:38AM +0000, Newman, Brad wrote:
> I'm using DRBD 8.4.0 with Heartbeat and Pacemaker on CentOS 6.
> I've encountered an issue repeatedly while setting up my DRBD - based on
> reading the logs, it seems to be caused by a corrupted linked list.
Yes, 8.4.0 is seriously broken,
at least if you actually try to use the multiple volumes per resource.
We are working on the 8.4.1 release.
I recommend to stay with 8.3.x (at the time of writing 8.3.12) in production
for the time being.
> Sometimes the problem occurs while the two nodes are syncing, but more
> often DRBD completes syncing and then fails after some apparently
> random interval (but in half a dozen trials, the failure occurred
> every time, and generally in less than an hour).
>
> The problem manifests itself as the primary node reporting the
> connection state as ProtocolError, and the standby reporting its
> connection state as WFConnection. Once the state on the primary is
> ProtocolError, DRBD appears to hang. I/O to the replicated volume
> also hangs, and the kernel produces "hung task" messages. Demoting
> and stopping DRBD on the primary times out, and I've been forced to
> `reboot -f` to recover the node.
>
> The connection state change to ProtocolError is always accompanied by
> kernel oops messages about "list_add corruption". However, I've seen
> several different stack traces with the oops message - so I assume
> that the stack traces are from where the problem is being detected,
> not from the code that's corrupting the list.
>
> Has anyone seen this before - is this a known issue that's already
> been fixed? Is this being caused by a problem with my configuration?
> In my searches I found a couple references to issues that look
> somewhat similar, but they were rather old and did not seem to have
> any resolutions. Any help would be greatly appreciated.
>
> Thanks,
>
> Brad Newman
>
> uname:
> Linux str00057.cup.hp.com 2.6.32-71.29.1.el6.x86_64 #1 SMP Mon Jun 27
> 19:49:27 BST 2011 x86_64 x86_64 x86_64 GNU/Linux
> (CentOS 6.0)
>
> DRBD version:
> version: 8.4.0 (api:1/proto:86-100)
>
> drbd.conf:
> resource foo {
> handlers {
> fence-peer "/usr/lib/drbd/crm-fence-peer.sh";
> after-resync-target "/usr/lib/drbd/crm-unfence-peer.sh";
> pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh;
> /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ;
> reboot -f";
> pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh;
> /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ;
> reboot -f";
> local-io-error "/usr/lib/drbd/notify-io-error.sh;
> /usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ;
> halt -f";
> }
> volume 0 {
> device /dev/drbd1;
> disk /dev/vg01/lv_files_rep;
> meta-disk internal;
> }
> volume 1 {
> device /dev/drbd2;
> disk /dev/vg01/lv_db_rep;
> meta-disk internal;
> }
> net {
> protocol C;
> sndbuf-size 0;
> after-sb-0pri discard-least-changes;
> after-sb-1pri discard-secondary;
> after-sb-2pri disconnect;
> }
> startup {
> wfc-timeout 60;
> degr-wfc-timeout 10;
> outdated-wfc-timeout 10;
> }
> disk {
> fencing resource-only;
> }
> floating ipv6 [fe80::250:56ff:fea0:1bb%eth1]:7789;
> floating ipv6 [fe80::250:56ff:fea0:12c%eth1]:7789;
> }
>
> And here's the log output from one of the trials:
> Dec 8 12:52:02 str00057 kernel: d-con foo: Handshake successful: Agreed
> network protocol version 100
> Dec 8 12:52:02 str00057 kernel: d-con foo: conn( WFConnection ->
> WFReportParams )
> Dec 8 12:52:02 str00057 kernel: d-con foo: Starting asender thread (from
> drbd_r_foo [11258])
> Dec 8 12:52:02 str00057 kernel: block drbd1: max BIO size = 1048576
> Dec 8 12:52:02 str00057 kernel: block drbd1: drbd_sync_handshake:
> Dec 8 12:52:02 str00057 kernel: block drbd1: self
> 77A9D37AA2C609DD:0000000000000004:0000000000000000:0000000000000000
> bits:786399 flags:0
> Dec 8 12:52:02 str00057 kernel: block drbd1: peer
> 0000000000000004:0000000000000000:0000000000000000:0000000000000000
> bits:786399 flags:0
> Dec 8 12:52:02 str00057 kernel: block drbd1: uuid_compare()=2 by rule 30
> Dec 8 12:52:02 str00057 kernel: block drbd1: Becoming sync source due to
> disk states.
> Dec 8 12:52:02 str00057 kernel: block drbd1: Writing the whole bitmap, full
> sync required after drbd_sync_handshake.
> Dec 8 12:52:02 str00057 kernel: block drbd1: bitmap WRITE of 24 pages took 5
> jiffies
> Dec 8 12:52:02 str00057 kernel: block drbd1: 3072 MB (786399 bits) marked
> out-of-sync by on disk bit-map.
> Dec 8 12:52:02 str00057 kernel: block drbd1: peer( Unknown -> Secondary )
> conn( WFReportParams -> WFBitMapS ) pdsk( DUnknown -> Inconsistent )
> Dec 8 12:52:02 str00057 kernel: block drbd1: Resumed AL updates
> Dec 8 12:52:02 str00057 kernel: block drbd1: send bitmap stats
> [Bytes(packets)]: plain 0(0), RLE 21(1), total 21; compression: 100.0%
> Dec 8 12:52:02 str00057 kernel: block drbd2: max BIO size = 1048576
> Dec 8 12:52:02 str00057 kernel: block drbd2: drbd_sync_handshake:
> Dec 8 12:52:02 str00057 kernel: block drbd2: self
> 4999C5E69B17CBF9:0000000000000004:0000000000000000:0000000000000000
> bits:2097079 flags:0
> Dec 8 12:52:02 str00057 kernel: block drbd2: peer
> 0000000000000004:0000000000000000:0000000000000000:0000000000000000
> bits:2097079 flags:0
> Dec 8 12:52:02 str00057 kernel: block drbd2: uuid_compare()=2 by rule 30
> Dec 8 12:52:02 str00057 kernel: block drbd2: Becoming sync source due to
> disk states.
> Dec 8 12:52:02 str00057 kernel: block drbd2: Writing the whole bitmap, full
> sync required after drbd_sync_handshake.
> Dec 8 12:52:02 str00057 kernel: block drbd2: bitmap WRITE of 64 pages took 4
> jiffies
> Dec 8 12:52:02 str00057 kernel: block drbd2: 8192 MB (2097079 bits) marked
> out-of-sync by on disk bit-map.
> Dec 8 12:52:02 str00057 kernel: block drbd2: peer( Unknown -> Secondary )
> conn( WFReportParams -> WFBitMapS ) pdsk( DUnknown -> Inconsistent )
> Dec 8 12:52:02 str00057 kernel: block drbd2: Resumed AL updates
> Dec 8 12:52:02 str00057 kernel: block drbd2: send bitmap stats
> [Bytes(packets)]: plain 0(0), RLE 21(1), total 21; compression: 100.0%
> Dec 8 12:52:02 str00057 kernel: block drbd1: receive bitmap stats
> [Bytes(packets)]: plain 0(0), RLE 21(1), total 21; compression: 100.0%
> Dec 8 12:52:02 str00057 kernel: block drbd1: helper command: /sbin/drbdadm
> before-resync-source minor-1
> Dec 8 12:52:02 str00057 kernel: block drbd1: helper command: /sbin/drbdadm
> before-resync-source minor-1 exit code 0 (0x0)
> Dec 8 12:52:02 str00057 kernel: block drbd1: conn( WFBitMapS -> SyncSource )
> Dec 8 12:52:02 str00057 kernel: block drbd1: Began resync as SyncSource
> (will sync 3145596 KB [786399 bits set]).
> Dec 8 12:52:02 str00057 kernel: block drbd2: receive bitmap stats
> [Bytes(packets)]: plain 0(0), RLE 21(1), total 21; compression: 100.0%
> Dec 8 12:52:02 str00057 kernel: block drbd2: helper command: /sbin/drbdadm
> before-resync-source minor-2
> Dec 8 12:52:02 str00057 kernel: block drbd1: updated sync UUID
> 77A9D37AA2C609DD:0001000000000004:0000000000000004:0000000000000000
> Dec 8 12:52:02 str00057 kernel: block drbd2: helper command: /sbin/drbdadm
> before-resync-source minor-2 exit code 0 (0x0)
> Dec 8 12:52:02 str00057 kernel: block drbd2: conn( WFBitMapS -> SyncSource )
> Dec 8 12:52:02 str00057 kernel: block drbd2: Began resync as SyncSource
> (will sync 8388316 KB [2097079 bits set]).
> Dec 8 12:52:02 str00057 kernel: block drbd2: updated sync UUID
> 4999C5E69B17CBF9:0001000000000004:0000000000000004:0000000000000000
> Dec 8 12:52:14 str00057 kernel: ------------[ cut here ]------------
> Dec 8 12:52:14 str00057 kernel: WARNING: at lib/list_debug.c:30
> __list_add+0x8f/0xa0() (Not tainted)
> Dec 8 12:52:14 str00057 kernel: Hardware name: VMware Virtual Platform
> Dec 8 12:52:14 str00057 kernel: list_add corruption. prev->next should be
> next (ffff88010d57f1e8), but was ffff880233cb3480. (prev=ffff880233cb3480).
> Dec 8 12:52:14 str00057 kernel: Modules linked in: drbd(U) libcrc32c sit
> tunnel4 ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables
> ip6t_REJECT nf_conntrack_ipv6 xt_state nf_conntrack ip6table_filter
> ip6_tables ipv6 vsock(U) ext3 jbd xfs exportfs dm_mirror dm_region_hash
> dm_log ppdev parport_pc parport e1000 vmware_balloon vmci(U) i2c_piix4
> i2c_core sg shpchp ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t10dif
> ata_generic pata_acpi ata_piix vmw_pvscsi dm_mod [last unloaded: microcode]
> Dec 8 12:52:14 str00057 kernel: Pid: 11258, comm: drbd_r_foo Not tainted
> 2.6.32-71.29.1.el6.x86_64 #1
> Dec 8 12:52:14 str00057 kernel: Call Trace:
> Dec 8 12:52:14 str00057 kernel: <IRQ> [<ffffffff8106b947>]
> warn_slowpath_common+0x87/0xc0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8106ba36>]
> warn_slowpath_fmt+0x46/0x50
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8126967f>] __list_add+0x8f/0xa0
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa03e9dcd>]
> drbd_endio_read_sec_final+0xad/0x3b0 [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffff811a2cf4>] ? bio_free+0x64/0x70
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa03ea280>]
> drbd_peer_request_endio+0x1b0/0x800 [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffff810563f3>] ? __wake_up+0x53/0x70
> Dec 8 12:52:14 str00057 kernel: [<ffffffff811a19ad>] bio_endio+0x1d/0x40
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa0001514>] dec_pending+0xe4/0x1e0
> [dm_mod]
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa00018af>] clone_endio+0x9f/0xd0
> [dm_mod]
> Dec 8 12:52:14 str00057 kernel: [<ffffffff811a19ad>] bio_endio+0x1d/0x40
> Dec 8 12:52:14 str00057 kernel: [<ffffffff812403cb>] req_bio_endio+0xab/0x110
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8124140f>]
> blk_update_request+0xff/0x440
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81241777>]
> blk_update_bidi_request+0x27/0x80
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8124284f>]
> blk_end_bidi_request+0x2f/0x80
> Dec 8 12:52:14 str00057 kernel: [<ffffffff812428f0>]
> blk_end_request+0x10/0x20
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8134b0bf>]
> scsi_io_completion+0xaf/0x550
> Dec 8 12:52:14 str00057 kernel: [<ffffffff813424b2>]
> scsi_finish_command+0xc2/0x130
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8134b6cd>]
> scsi_softirq_done+0x14d/0x170
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81247e25>]
> blk_done_softirq+0x85/0xa0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81073d67>] __do_softirq+0xb7/0x1e0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81095c50>] ?
> hrtimer_interrupt+0x140/0x250
> Dec 8 12:52:14 str00057 kernel: [<ffffffff810142cc>] call_softirq+0x1c/0x30
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81015f35>] do_softirq+0x65/0xa0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81073b65>] irq_exit+0x85/0x90
> Dec 8 12:52:14 str00057 kernel: [<ffffffff814d0a31>]
> smp_apic_timer_interrupt+0x71/0x9c
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81013c93>]
> apic_timer_interrupt+0x13/0x20
> Dec 8 12:52:14 str00057 kernel: <EOI> [<ffffffff814cbab7>] ?
> _spin_unlock_irqrestore+0x17/0x20
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8134286c>]
> scsi_dispatch_cmd+0x1bc/0x340
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8134a1c5>]
> scsi_request_fn+0x425/0x5c0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81240bc2>]
> __generic_unplug_device+0x32/0x40
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8123a7c9>] elv_insert+0x79/0x1f0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff8123a9b2>]
> __elv_add_request+0x72/0xd0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff812435af>]
> __make_request+0x12f/0x4c0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff81241982>]
> generic_make_request+0x1b2/0x4f0
> Dec 8 12:52:14 str00057 kernel: [<ffffffff811a26c0>] ?
> __bio_add_page+0x110/0x230
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa03f160c>]
> drbd_submit_peer_request+0x1dc/0x2c0 [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa03f7128>]
> receive_DataRequest+0x488/0x710 [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa03efd36>] ?
> drbd_recv_all+0x16/0x40 [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa03f0608>] drbdd+0xb8/0x180 [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa03f6c30>] drbdd_init+0x40/0xb0
> [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa0405a39>]
> drbd_thread_setup+0xa9/0x160 [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffff810141ca>] child_rip+0xa/0x20
> Dec 8 12:52:14 str00057 kernel: [<ffffffffa0405990>] ?
> drbd_thread_setup+0x0/0x160 [drbd]
> Dec 8 12:52:14 str00057 kernel: [<ffffffff810141c0>] ? child_rip+0x0/0x20
> Dec 8 12:52:14 str00057 kernel: ---[ end trace 649ecfd255e04a60 ]---
> Dec 8 12:52:14 str00057 kernel: d-con foo: BAD! BarrierAck #3293967630
> received with n_writes=1, expected n_writes=2!
> Dec 8 12:52:14 str00057 kernel: d-con foo: peer( Secondary -> Unknown )
> conn( SyncSource -> ProtocolError )
And so on.
--
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com
DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
__
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