Date: Wed, 4 Oct 2023 21:41:41 -0400 From: Carl Chave <online@...ve.us> To: musl@...ts.openwall.com Subject: Hung processes with althttpd web server Hello, I'm running the althttpd web server on Alpine Linux using a Ramnode VPS. I've been having issues for quite a while with "hung" processes. There is a long lived parent process and then a short lived forked process for each http request. What I've been seeing is that the forked processes will sometimes get stuck: sod01:/srv/www/log$ sudo strace -p 11329 strace: Process 11329 attached futex(0x7f5bdcd77900, FUTEX_WAIT_PRIVATE, 4294967295, NULL Please see this forum thread for additional information: https://sqlite.org/althttpd/forumpost/4dc31619341ce947 That thread is kind of all over the place though as I banged around trying to figure out how to troubleshoot the issue. The last thing I tried was to statically build althttpd in a glibc based Void Linux chroot. I ran that on the Alpine VPS for 37 days without issue. I switched back to the musl dynamically linked build and 14 hours later got a hung process. Can you give me any tips on how to troubleshoot this further? Thanks, Carl
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