Please describe the problem.

Doing a HEAD request against the /git-annex/$uuid/key/$key endpoint and also any of the versioned key endpoints works the first time, but after that the p2phttp process stops answering any requests.

This is independent of the values for --jobs and --cpus, so does not seem to be another case of blocked worker processes.

What steps will reproduce the problem?

  1. Serve a repository with p2phttp: git -C . annex p2phttp --jobs 200 --cpus 4 --bind 127.0.0.1 --wideopen --port 54321 --debug
  2. Do a HEAD request: curl --head http://localhost:54321/git-annex/df5642e3-3777-42ac-8c40-f9c1c7264e66/key/MD5E-s5--2b00042f7481c7b056c4b410d28f33cf (substitute uuid and key for valid values)
  3. Do the same HEAD request again, observe it getting stuck

What version of git-annex are you using? On what operating system?

git-annex version: 10.20260421-gd789e57311eca6bbf4949a6f22b44dd46aabb9b1
build flags: Assistant Webapp Inotify TorrentParser MagicMime Benchmark Feeds Testsuite S3 WebDAV Servant OsPath
dependency versions: aws-0.25.2 bloomfilter-2.0.1.3 crypton-1.0.4 DAV-1.3.4 feed-1.3.2.1 ghc-9.10.3 http-client-0.7.19 torrent-10000.1.3 uuid-1.3.16 yesod-1.6.2.1
key/value backends: SHA256E SHA256 SHA512E SHA512 SHA224E SHA224 SHA384E SHA384 SHA3_256E SHA3_256 SHA3_512E SHA3_512 SHA3_224E SHA3_224 SHA3_384E SHA3_384 SKEIN256E SKEIN256 SKEIN512E SKEIN512 BLAKE2B256E BLAKE2B256 BLAKE2B512E BLAKE2B512 BLAKE2B160E BLAKE2B160 BLAKE2B224E BLAKE2B224 BLAKE2B384E BLAKE2B384 BLAKE2BP512E BLAKE2BP512 BLAKE2S256E BLAKE2S256 BLAKE2S160E BLAKE2S160 BLAKE2S224E BLAKE2S224 BLAKE2SP256E BLAKE2SP256 BLAKE2SP224E BLAKE2SP224 SHA1E SHA1 MD5E MD5 WORM URL GITBUNDLE GITMANIFEST VURL X*
remote types: git gcrypt p2p S3 bup directory rsync web bittorrent webdav adb tahoe glacier ddar git-lfs httpalso borg rclone hook external compute mask
operating system: linux x86_64
supported repository versions: 8 9 10
upgrade supported from repository versions: 0 1 2 3 4 5 6 7 8 9 10
local repository version: 10

Please provide any additional information below.

p2phttp output:

# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log

$ git -C . annex p2phttp --jobs 200 --cpus 4 --bind 127.0.0.1 --wideopen --port 54321 --debug
[2026-05-15 11:20:23.895756881] (Utility.Process) process [652639] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","-c","annex.debug=true","show-ref","git-annex"]
[2026-05-15 11:20:23.896781487] (Utility.Process) process [652639] done ExitSuccess
[2026-05-15 11:20:23.896998219] (Utility.Process) process [652640] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","-c","annex.debug=true","show-ref","--hash","refs/heads/git-annex"]
[2026-05-15 11:20:23.897894537] (Utility.Process) process [652640] done ExitSuccess
[2026-05-15 11:20:23.89863384] (Utility.Process) process [652641] chat: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","-c","annex.debug=true","cat-file","--batch"]
[2026-05-15 11:20:23.900090498] (Utility.Process) process [652642] read: git ["-c","safe.directory=*","-c","safe.bareRepository=all","config","--null","--list"] in "./../a1-bare"
[2026-05-15 11:20:23.901180123] (Git.Config) git config read: [("",[""]),("alias.gone",["! git fetch -p && git for-each-ref --format '%(refname:short) %(upstream:track)' | awk '$2 == \"[gone]\" {print $1}' | xargs -r git branch -D"]),("alias.lol",["log --graph --decorate --pretty=oneline --abbrev-commit"]),("alias.lola",["log --graph --decorate --pretty=oneline --abbrev-commit --all"]),("alias.wdiff",["diff --color-words=."]),("annex.url",["annex+http://localhost:54321"]),("annex.uuid",["184144b2-f69b-46a2-80e2-58bfb149e11d"]),("annex.version",["10"]),("branch.sort",["-committerdate"]),("color.branch",["auto"]),("color.diff",["auto"]),("color.interactive",["auto"]),("color.status",["auto"]),("column.ui",["auto"]),("commit.verbose",["true"]),("core.bare",["true"]),("core.filemode",["true"]),("core.repositoryformatversion",["0"]),("credential.helper",["oauth -verbose","cache --timeout 21600"]),("credential.https://jugit.fz-juelich.de.oauthclientid",["9d539aa7c067a768bfea62e27daf6da2cd8c0242063f068508222404b94896e2"]),("datalad.create-sibling-ghlike.extra-remote-settings.atris.fz-juelich.de.annex-ignore",["false"]),("datalad.credential.demo.dataverse.org.last-used",["2025-02-27T10:03:48.565458"]),("datalad.credential.demo.dataverse.org.realm",["https://demo.dataverse.org/dataverse"]),("datalad.credential.demo.dataverse.org.type",["token"]),("diff.annextextdiff.command",["git annex diffdriver --text"]),("diff.colormoved",["true"]),("diff.wordregex",["."]),("filter.lfs.clean",["git-lfs clean -- %f"]),("filter.lfs.process",["git-lfs filter-process"]),("filter.lfs.required",["true"]),("filter.lfs.smudge",["git-lfs smudge -- %f"]),("http.sslcainfo",["/home/icg149/.pixi/envs/git/ssl/cacert.pem"]),("http.sslcapath",["/home/icg149/.pixi/envs/git/ssl/cacert.pem"]),("http.sslverify",["true"]),("init.defaultbranch",["main"]),("merge.conflictstyle",["diff3"]),("merge.mergiraf.driver",["mergiraf merge --git %O %A %B -s %S -x %X -y %Y -p %P -l %L"]),("merge.mergiraf.name",["mergiraf"]),("rebase.autosquash",["true"]),("rebase.autostash",["true"]),("rebase.updaterefs",["true"]),("rerere.autoupdate",["true"]),("rerere.enabled",["true"]),("safe.barerepository",["all"]),("safe.directory",["*"]),("tag.sort",["version:refname"]),("user.email",["m.risse@fz-juelich.de"]),("user.name",["Matthias Ri\223e"])]
[2026-05-15 11:20:23.901462068] (Utility.Process) process [652642] done ExitSuccess
[2026-05-15 11:20:23.901933159] (Annex.Branch) read proxy.log
[2026-05-15 11:20:37.787308378] (P2P.IO) [http client] [ThreadId 20] P2P > GET 0  MD5E-s5--2b00042f7481c7b056c4b410d28f33cf
[2026-05-15 11:20:37.787517924] (P2P.IO) [http server] [ThreadId 19] P2P < GET 0  MD5E-s5--2b00042f7481c7b056c4b410d28f33cf
[2026-05-15 11:20:37.788184946] (Utility.Process) process [652703] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","-c","annex.debug=true","-c","filter.annex.smudge=","-c","filter.annex.clean=","-c","filter.annex.process=","write-tree"]
[2026-05-15 11:20:37.790260868] (Utility.Process) process [652703] done ExitSuccess
[2026-05-15 11:20:37.790588597] (Utility.Process) process [652704] read: git ["--git-dir=.git","--work-tree=.","--literal-pathspecs","-c","annex.debug=true","show-ref","--hash","refs/annex/last-index"]
[2026-05-15 11:20:37.791806257] (Utility.Process) process [652704] done ExitSuccess
[2026-05-15 11:20:37.792481433] (P2P.IO) [http server] [ThreadId 19] P2P > DATA 5
[2026-05-15 11:20:37.792564378] (P2P.IO) [http client] [ThreadId 20] P2P < DATA 5


# End of transcript or log.

curl requests:

# If you can, paste a complete transcript of the problem occurring here.
# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log

$ curl --head http://localhost:54321/git-annex/df5642e3-3777-42ac-8c40-f9c1c7264e66/key/MD5E-s5--2b00042f7481c7b056c4b410d28f33cf
HTTP/1.1 200 OK
Date: Fri, 15 May 2026 09:20:37 GMT
Server: Warp/3.4.9
Content-Type: application/octet-stream
X-git-annex-data-length: 5

icg149@icg1911:~/Playground/c1$ curl --head http://localhost:54321/git-annex/df5642e3-3777-42ac-8c40-f9c1c7264e66/key/MD5E-s5--2b00042f7481c7b056c4b410d28f33cf
[stuck]


# End of transcript or log.

Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)