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From: | Benny Zlotnik |
Subject: | Re: [Qemu-block] [Qemu-discuss] qemu-img convert stuck |
Date: | Sun, 8 Apr 2018 22:35:16 +0300 |
On Sun, Apr 8, 2018 at 9:27 PM Benny Zlotnik <address@hidden> wrote:Hi,
As part of copy operation initiated by rhev got stuck for more than a day
and consumes plenty of CPU
vdsm 13024 3117 99 Apr07 ? 1-06:58:43 /usr/bin/qemu-img convert
-p -t none -T none -f qcow2
/rhev/data-center/bb422fac-81c5-4fea-8782-3498bb5c8a59/ 26989331-2c39-4b34-a7ed- d7dd7703646c/images/597e12b6- 19f5-45bd-868f-767600c7115e/ 62a5492e-e120-4c25-898e- 9f5f5629853e
-O raw /rhev/data-center/mnt/mantis-nfs-lif1.lab.eng.tlv2.redhat. :com
_vol__service/26989331-2c39-4b34-a7ed-d7dd7703646c/images/ 9ece9408-9ca6-48cd-992a- 6f590c710672/06d6d3c0-beb8- 4b6b-ab00-56523df185da
The target image appears to have no data yet:
qemu-img info 06d6d3c0-beb8-4b6b-ab00-56523df185da"
image: 06d6d3c0-beb8-4b6b-ab00-56523df185da
file format: raw
virtual size: 120G (128849018880 bytes)
disk size: 0
strace -p 13024 -tt -T -f shows only:
...
21:13:01.309382 ppoll([{fd=12, events=POLLIN|POLLERR|POLLHUP}], 1, {0, 0},
NULL, 8) = 0 (Timeout) <0.000010>
21:13:01.309411 ppoll([{fd=12, events=POLLIN|POLLERR|POLLHUP}], 1, {0, 0},
NULL, 8) = 0 (Timeout) <0.000009>
21:13:01.309440 ppoll([{fd=12, events=POLLIN|POLLERR|POLLHUP}], 1, {0, 0},
NULL, 8) = 0 (Timeout) <0.000009>
21:13:01.309468 ppoll([{fd=12, events=POLLIN|POLLERR|POLLHUP}], 1, {0, 0},
NULL, 8) = 0 (Timeout) <0.000010>
version: qemu-img-rhev-2.9.0-16.el7_4.13.x86_64
What could cause this? I'll provide any additional information neededA backtrace may help, try:gdb -p 13024 -batch -ex "thread apply all bt"Also adding Kevin and qemu-block.Nir
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