Continuous crashing ZFS server

[Willem Jan Withagen]

On 11/06/2018 12:13, Andriy Gapon wrote:
> On 08/06/2018 13:02, Willem Jan Withagen wrote:
>> My file server is crashing about every 15 minutes at the moment.
>> The panic looks like:
>>
>> Jun  8 11:48:43 zfs kernel: panic: Solaris(panic): zfs: allocating
>> allocated segment(offset=12922221670400 size=24576)
>> Jun  8 11:48:43 zfs kernel:
>> Jun  8 11:48:43 zfs kernel: cpuid = 1
>> Jun  8 11:48:43 zfs kernel: KDB: stack backtrace:
>> Jun  8 11:48:43 zfs kernel: #0 0xffffffff80aada57 at kdb_backtrace+0x67
>> Jun  8 11:48:43 zfs kernel: #1 0xffffffff80a6bb36 at vpanic+0x186
>> Jun  8 11:48:43 zfs kernel: #2 0xffffffff80a6b9a3 at panic+0x43
>> Jun  8 11:48:43 zfs kernel: #3 0xffffffff82488192 at vcmn_err+0xc2
>> Jun  8 11:48:43 zfs kernel: #4 0xffffffff821f73ba at zfs_panic_recover+0x5a
>> Jun  8 11:48:43 zfs kernel: #5 0xffffffff821dff8f at range_tree_add+0x20f
>> Jun  8 11:48:43 zfs kernel: #6 0xffffffff821deb06 at metaslab_free_dva+0x276
>> Jun  8 11:48:43 zfs kernel: #7 0xffffffff821debc1 at metaslab_free+0x91
>> Jun  8 11:48:43 zfs kernel: #8 0xffffffff8222296a at zio_dva_free+0x1a
>> Jun  8 11:48:43 zfs kernel: #9 0xffffffff8221f6cc at zio_execute+0xac
>> Jun  8 11:48:43 zfs kernel: #10 0xffffffff80abe827 at
>> taskqueue_run_locked+0x127
>> Jun  8 11:48:43 zfs kernel: #11 0xffffffff80abf9c8 at
>> taskqueue_thread_loop+0xc8
>> Jun  8 11:48:43 zfs kernel: #12 0xffffffff80a2f7d5 at fork_exit+0x85
>> Jun  8 11:48:43 zfs kernel: #13 0xffffffff80ec4abe at fork_trampoline+0xe
>> Jun  8 11:48:43 zfs kernel: Uptime: 9m7s
>>
>> Maybe a known bug?
>> Is there anything I can do about this?
>> Any debugging needed?
> 
> Sorry to inform you but your on-disk data got corrupted.
> The most straightforward thing you can do is try to save data from the pool in
> readonly mode.

Hi Andriy,

Auch, that is a first in 12 years of using ZFS. "Fortunately" it was of 
a test ZVOL->iSCSI->Win10 disk on which I spool my CAMs.

Removing the ZVOL actually fixed the rebooting, but now the question is:
	Is the remainder of the zpools on the same disks in danger?

--WjW