On a build machine running ‘cuirass remote-server’ with /gnu/store/5g4c9kii8l50lw23s7yb2a4bvc7qzw5d-guix-1.4.0-10.4dfdd82/bin/guix-daemon (from Guix commit 2ab5e449246f98b049888dde3c310f5b4a0a64a2), I see these ‘cuirass remote-worker’ errors:
--8<---------------cut here---------------start------------->8--- 2023-11-27 06:49:54 CwQfwEE3: building derivation `/gnu/store/rivlxrqr10g3kj9knyz7i41aq1vzxn9z-r-ecoregime-0.1.3.drv' (system: x86_64-linux) 2023-11-27 06:50:11 error: CwQfwEE3: unexpected error while building '/gnu/store/rivlxrqr10g3kj9knyz7i41aq1vzxn9z-r-ecoregime-0.1.3.drv': #<&nar-error file: #f port: #<input-output: socket 52>> […] 2023-11-27 07:00:58 CwQfwEE3: building derivation `/gnu/store/b5qrpwpx5sbmlj5f7nx6wknnkczadjcn-r-cpp-0.1.0.drv' (system: x86_64-linux) 2023-11-27 07:01:20 error: CwQfwEE3: unexpected error while building '/gnu/store/b5qrpwpx5sbmlj5f7nx6wknnkczadjcn-r-cpp-0.1.0.drv': #<&nar-error file: #f port: #<input-output: socket 52>> --8<---------------cut here---------------end--------------->8--- … corresponding to these guix-daemon messages: --8<---------------cut here---------------start------------->8--- 2023-11-27 06:49:54 accepted connection from pid 14007, user root 2023-11-27 06:50:11 guix-daemon: nix/libstore/build.cc:3322: void nix::Worker::childTerminated(pid_t, bool): Assertion `i != children.end()' failed. […] 2023-11-27 07:00:58 accepted connection from pid 14007, user root 2023-11-27 07:01:20 guix-daemon: nix/libstore/build.cc:3322: void nix::Worker::childTerminated(pid_t, bool): Assertion `i != children.end()' failed. --8<---------------cut here---------------end--------------->8--- The corresponding build log (sent by ‘cuirass remote-worker’ to the server): --8<---------------cut here---------------start------------->8--- $ zcat /var/cache/cuirass/remote/rivlxrqr10g3kj9knyz7i41aq1vzxn9z.log.gz |tail @ substituter-started /gnu/store/gymm7n27rfhyz83zx3lw0bwg4m6alpzw-ecoregime_0.1.3.tar.gz substitute guix substitute: warning: while fetching https://ci.guix.gnu.org/nar/gymm7n27rfhyz83zx3lw0bwg4m6alpzw-ecoregime_0.1.3.tar.gz: server is somewhat slow guix substitute: warning: try `--no-substitutes' if the problem persists retrying download of '/gnu/store/gymm7n27rfhyz83zx3lw0bwg4m6alpzw-ecoregime_0.1.3.tar.gz' with other substitute URLs... guix substitute: warning: while fetching https://ci.guix.gnu.org/nar/gymm7n27rfhyz83zx3lw0bwg4m6alpzw-ecoregime_0.1.3.tar.gz: server is somewhat slow guix substitute: warning: try `--no-substitutes' if the problem persists guix substitute: error: failed to find alternative substitute for '/gnu/store/gymm7n27rfhyz83zx3lw0bwg4m6alpzw-ecoregime_0.1.3.tar.gz' fetching path `/gnu/store/gymm7n27rfhyz83zx3lw0bwg4m6alpzw-ecoregime_0.1.3.tar.gz' (empty status: '') @ substituter-failed /gnu/store/gymm7n27rfhyz83zx3lw0bwg4m6alpzw-ecoregime_0.1.3.tar.gz fetching path `/gnu/store/gymm7n27rfhyz83zx3lw0bwg4m6alpzw-ecoregime_0.1.3.tar.gz' (empty status: '') fetching path `/gnu/store/yiqzanx7vb8s0sj9h15p2llxwrkv0xzh-r-descriptio-1.2'... $ zcat /var/cache/cuirass/remote/b5qrpwpx5sbmlj5f7nx6wknnkczadjcn.log.gz |tail substitute: updating substitutes from 'http://194.199.1.1:5557'... 100.0% guix substitute: warning: while fetching https://ci.guix.gnu.org/nar/iqi6s452hqy3k3n335c5v9nb6wq8h9nn-CPP_0.1.0.tar.gz: server is somewhat slow guix substitute: warning: try `--no-substitutes' if the problem persists retrying download of '/gnu/store/iqi6s452hqy3k3n335c5v9nb6wq8h9nn-CPP_0.1.0.tar.gz' with other substitute URLs... guix substitute: warning: while fetching https://ci.guix.gnu.org/nar/iqi6s452hqy3k3n335c5v9nb6wq8h9nn-CPP_0.1.0.tar.gz: server is somewhat slow guix substitute: warning: try `--no-substitutes' if the problem persists guix substitute: error: failed to find alternative substitute for '/gnu/store/iqi6s452hqy3k3n335c5v9nb6wq8h9nn-CPP_0.1.0.tar.gz' fetching path `/gnu/store/iqi6s452hqy3k3n335c5v9nb6wq8h9nn-CPP_0.1.0.tar.gz' (empty status: '') @ substituter-failed /gnu/store/iqi6s452hqy3k3n335c5v9nb6wq8h9nn-CPP_0.1.0.tar.gz fetching path `/gnu/store/iqi6s452hqy3k3n335c5v9nb6wq8h9nn-CPP_0.1.0.tar.gz' (empty status: '') fetching path `/gnu/store/b7rnd5y4zsc1995h0a8w294pzdgbmhr9-mc2d_0.2.0.tar.gz'... --8<---------------cut here---------------end--------------->8--- In both cases, “failed to find alternative substitute” leads ‘guix substitute’ to exit, which guix-daemon doesn’t really cope with. Ludo’.
