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Downloaded image hash does not match (stale network cache)
I can reliably observe this:
$ multipass launch snapcraft:core18
launch failed: Downloaded image hash does not match
The only logs (from journalctl) are this:
sept. 01 15:18:03 bribon multipassd[7063]: Read pid "7189" from file "/var/snap/multipass/common/data/multipassd/network/dnsmasq.pid"
sept. 01 15:18:03 bribon multipassd[7063]: existing dnsmasq found with pid 7189
Additional info
- OS: Ubuntu 20.04.1
- multipass version: 1.4.0 (revision 2445)
Hey @oSoMoN, does snap restart multipass
, or rebooting, help? Do you have a proxy set up?
This should get you going, btw:
snap stop multipass
sudo rm -rf /var/snap/multipass/common/cache/multipassd/network-cache/
snap start multipass
Hey @oSoMoN, does
snap restart multipass
, or rebooting, help? Do you have a proxy set up?
snap restart multipass
didn't help. I couldn't test rebooting as I have long-running local processes that I'd rather not interrupt. No proxy.
Deleting the network-cache
folder and restarting multipass did the trick, though. Thanks!
How could it possibly get in such a state?
How could it possibly get in such a state?
Looks like QNetworkDiskCache
, that we have in front of our HTTP requests, decided it won't grab the new SHA256SUMS
file. We'll need to dig if we can ask it to check if the file got updated, first.
Upon some debugging and digging, I've found that this is caused by a Qt bug: https://bugreports.qt.io/browse/QTBUG-81318
There is a proposed fix since August 2020, but it remains unmerged: https://codereview.qt-project.org/c/qt/qtbase/+/296092
Seeing as this goes against the default and described behavior, this is pretty bad on Qt's part. See the QNetworkRequest::PreferNetwork
part in https://doc.qt.io/qt-5/qnetworkrequest.html#CacheLoadControl-enum
I got the same issue on windows 10 pro.
C:\Data\projects\makabaka>multipass version
multipass 1.9.1+win
multipassd 1.9.1+win
C:\Data\projects\makabaka>multipass.exe launch -c=4 -m=8G -d=20G -n=makabaka-1-1 20.04
launch failed: Downloaded image hash does not match
I just uninstalled version 1.8 and installed version 1.9 and restarted my PC, and still got this error. Is there a way to get around it?
I download ubuntu-20.04-server-cloudimg-amd64.img
manually and the md5sum
is corrected. Is there a way to tell multipass to use the manually downloaded file?
I moved my manually downloaded file to C:\ProgramData\Multipass\cache\vault\images\focal-20220706
, but it get removed, and downloaded again when I run multipass launch
.
Hi @UchihaYuki,
Yeah, it's a Qt bug. You need to remove, C:\ProgramData\Multipass\cache\network-cache
and restart the Multipass service and that should clear it up.
I able to solve it by reinstall multipass on my mac
this still happened until now '__') but that workaround above seems to work
sudo snap stop multipass
sudo rm -rf /var/snap/multipass/common/cache/multipassd/network-cache/
sudo snap start multipass
sleep 1m; multipass launch jammy --cpus 2 --disk 20G --memory 8G --name ubu22
but after a while it's error again
Apr 13 13:34:20 pop2204 multipassd[25405]: Error getting https://cloud-images.ubuntu.com/releases/server/releases/jammy/release-20240319/ubuntu-22.04-server-cloudimg-amd64.img: Network timeout - trying cache.
Apr 13 13:34:20 pop2204 multipassd[25405]: Verifying hash "304983616fcba6ee1452e9f38993d7d3b8a90e1eb65fb0054d672ce23294d812"
or is there any way to download the image manually with more reliable software like aria2c
?
or add an auto-retry for people that live in country with slow and unreliable internet?