File has unexpected size (7660 != 7398). Mirror sync in progress?

getting this error when running system update

sudo apt-get update
Hit:1 focal InRelease
Hit:2 focal-updates InRelease
Hit:3 focal-backports InRelease
Hit:4 stable InRelease
Hit:5 focal InRelease
Hit:6 focal-security InRelease
Hit:7 apt/dev/ InRelease
Hit:8 focal-proposed InRelease
Get:9 stable InRelease [4,317 B]
Hit:10 focal InRelease
Hit:11 stable InRelease
Hit:12 focal InRelease
Hit:13 stable InRelease
Hit:14 focal InRelease
Get:15 ./ InRelease [2,441 B]
Get:16 stable/main amd64 Packages [7,398 B]
Err:16 stable/main amd64 Packages File has unexpected size (7660 != 7398). Mirror sync in progress? [IP: 99.84.126.35 443] Hashes of expected file: - Filesize:7398 [weak] - SHA512:8bd5e753fce431f6e7cf8111722cd89c296598b62b335fd839e4c85c90d348a61347a456f3f8d117e3ae4c035cff797549eb2f4d5ecdccbc949d397c1b7e56ca - SHA256:bb14d8a13aac904ca0410bf622f7d062f3336273d94a7a33b881d223234f7167 - SHA1:fe3f258c595be080b276763c160a04c4bc2f59ca [weak] - MD5Sum:6a2fa07708eb6be197aae80b61a5906c [weak] Release file created at: Sat, 31 Jul 2021 06:46:39 +0000
Fetched 6,758 B in 2s (3,237 B/s)
Reading package lists... Done
E: Failed to fetch File has unexpected size (7660 != 7398). Mirror sync in progress? [IP: 99.84.126.35 443] Hashes of expected file: - Filesize:7398 [weak] - SHA512:8bd5e753fce431f6e7cf8111722cd89c296598b62b335fd839e4c85c90d348a61347a456f3f8d117e3ae4c035cff797549eb2f4d5ecdccbc949d397c1b7e56ca - SHA256:bb14d8a13aac904ca0410bf622f7d062f3336273d94a7a33b881d223234f7167 - SHA1:fe3f258c595be080b276763c160a04c4bc2f59ca [weak] - MD5Sum:6a2fa07708eb6be197aae80b61a5906c [weak] Release file created at: Sat, 31 Jul 2021 06:46:39 +0000
E: Some index files failed to download. They have been ignored, or old ones used instead.

1 Answer

Solution ... just wait several minutes and rerun the update

sudo apt-get update

evidently I ran the command in middle of system updates getting refreshed upstream ... personally system should not expose this level of detail to enduser ... certainly it should avoid printing out the word error instead make this a notice message

1

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