Hello, > (That still doesn’t tell us why our ‘guix offload’ processes would > occasionally be stuck but at least it ensures the build farm keeps > making progress even when that happens.) I'm still not sure it's directly related to this bug but I observed several offloading hangs on Berlin today. For instance, in Cuirass logs: --8<---------------cut here---------------start------------->8--- 2020-07-02T09:59:45 '/gnu/store/rm8ndiichxhwybaizis5pgck77952ilp-halt.drv' offloaded to '141.80.167.164' 2020-07-02T09:54:30 '/gnu/store/dxczkbf5wa6qr37gm7wr995hcxs8s0ya-motion-4.2.2.drv' offloaded to '141.80.167.170' --8<---------------cut here---------------end--------------->8--- those two builds were offloaded around 10:00 today and there's still no report from them at 16:00. On 141.80.167.164 there's a matching build log: --8<---------------cut here---------------start------------->8--- -rw-r--r-- 1 root root 1735 Jul 2 10:00 /var/log/guix/drvs/rm/8ndiichxhwybaizis5pgck77952ilp-halt.drv.bz2 --8<---------------cut here---------------end--------------->8--- same on 141.80.167.170, --8<---------------cut here---------------start------------->8--- -rw-r--r-- 1 root root 6344 Jul 2 09:56 /var/log/guix/drvs/dx/czkbf5wa6qr37gm7wr995hcxs8s0ya-motion-4.2.2.drv.bz2 --8<---------------cut here---------------end--------------->8--- Having those builds "unfinished" keeps the rest of the evaluation hanging. Running this SQL command in Cuirass database: --8<---------------cut here---------------start------------->8--- sqlite> select derivation, datetime(starttime, 'unixepoch', 'localtime'),stoptime from Builds where status=-1 and evaluation=14771; /gnu/store/ncp59nyidli4lm3ff2lkfjym25yb18j5-guix-1.1.0-14.5bd8033.drv|2020-07-02 09:33:04|0 /gnu/store/rm8ndiichxhwybaizis5pgck77952ilp-halt.drv|2020-07-02 09:59:28|0 /gnu/store/71wnjgm2waqgw3fqmxmc4r3f1ifd1l92-cups-test.drv|2020-07-02 10:00:26|0 /gnu/store/9qsqd7jfwnaw9sm323y45cwymn98kyjl-exim-test.drv|2020-07-02 10:00:51|0 /gnu/store/vhcww4fw4qxw0hl1009npd26b22gfj3c-bitlbee-test.drv|2020-07-02 10:00:24|0 /gnu/store/92jrd6dfzgdifr107hwi64s8hf4mls47-iptables.drv|2020-07-02 09:59:49|0 /gnu/store/380nq6sjphd0agrvl43sr6ypli1yraz4-gnunet-0.12.2.drv|2020-07-02 09:51:32|0 /gnu/store/lqs22nbc6vy2z2524rmkcsmbh5mllm62-cuirass-0.0.1-37.882393d.drv|2020-07-02 10:34:37|0 /gnu/store/dxczkbf5wa6qr37gm7wr995hcxs8s0ya-motion-4.2.2.drv|2020-07-02 09:54:02|0 /gnu/store/5ln3r997ycr7rd6fqahd2d426mjw0rxb-gzochi-0.12.drv|2020-07-02 09:53:51|0 --8<---------------cut here---------------end--------------->8--- shows that the evaluation is pretty much pending since 10:00. According to Cuirass logs again, all those builds were offloaded, "/gnu/store/380nq6sjphd0agrvl43sr6ypli1yraz4-gnunet-0.12.2.drv", "/gnu/store/lqs22nbc6vy2z2524rmkcsmbh5mllm62-cuirass-0.0.1-37.882393d.drv" and /gnu/store/5ln3r997ycr7rd6fqahd2d426mjw0rxb-gzochi-0.12.drv are reported as failed, and all other are still hanging. Something is going wrong here! I'll keep investigating. Thanks, Mathieu