On Wed, Jul 24, 2013 at 06:07:21PM +0900, MORITA Kazutaka wrote: > At Wed, 24 Jul 2013 16:28:30 +0800, > Liu Yuan wrote: > > > > On Wed, Jul 24, 2013 at 04:56:24PM +0900, MORITA Kazutaka wrote: > > > Currently, if a sheepdog server exits, all the connecting VMs need to > > > be restarted. This series implements a feature to reconnect the > > > server, and enables us to do online sheepdog upgrade and avoid > > > restarting VMs when sheepdog servers crash unexpectedly. > > > > > > > It doesn't work on my test. I tried start linux-0.2.img stored in sheepdog > > cluster and then > > > > 1. did some buffered writes > > 2. restart sheep that this QEMU VM connected to. > > 3. $ sync > > > > I got following error: > > > > $ ../qemu/x86_64-softmmu/qemu-system-x86_64 --enable-kvm -m 1024 -hda > > sheepdog:test > > qemu-system-x86_64: failed to get the header, Resource temporarily > > unavailable > > qemu-system-x86_64: Failed to connect to socket: Connection refused > > qemu-system-x86_64: Failed to connect to socket: Connection refused > > qemu-system-x86_64: Failed to connect to socket: Connection refused > > qemu-system-x86_64: Failed to connect to socket: Connection refused > > qemu-system-x86_64: Failed to connect to socket: Connection refused > > ...repeat... > > > > QEMU version is master tip > > Your sheep daemon looks like unreachable from qemu. I tried the same > procedure, but couldn't reproduce it. > > Is the problem reproducible? Can you make sure that you can connect > to the sheep daemon from collie while the error message shows up? >
Yesh. Well I try to repeat it with following process: 1. did some buffered write 2. kill the sheep 3. $ sync # at guest, now 'sync' hang for response 4. restart sheep After 4 'sync' still hangs until timeout with a message "hda:dma_timer_expiry: dma status == 0x21" Guest end up freeze. QEMU output is the same: qemu-system-x86_64: failed to get the header, Resource temporarily unavailable qemu-system-x86_64: Failed to connect to socket: Connection refused qemu-system-x86_64: Failed to connect to socket: Connection refused qemu-system-x86_64: Failed to connect to socket: Connection refused qemu-system-x86_64: Failed to connect to socket: Connection refused But notice, if I did restart sheep with guest doing nothing, your patch set work like a charm. Thanks Yuan
