[Expired for systemd (Ubuntu Bionic) because there has been no activity for 60 days.]
** Changed in: systemd (Ubuntu Bionic) Status: Incomplete => Expired -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1904369 Title: systemd 100% CPU; constantly reading service for socket activation Status in systemd package in Ubuntu: Expired Status in systemd source package in Bionic: Expired Bug description: Hi, We recently switched to using systemd's socket activation for per- client limits. The configs are as follows: | $ ls -la /etc/systemd/system/sockets.target.wants/rsyncd.socket | lrwxrwxrwx 1 root root 33 Aug 25 00:09 /etc/systemd/system/sockets.target.wants/rsyncd.socket -> /etc/systemd/system/rsyncd.socket | $ cat /etc/systemd/system/sockets.target.wants/rsyncd.socket | [Unit] | Description=rsync daemon (socket) | Conflicts=rsyncd.service | | [Socket] | ListenStream=873 | Accept=yes | MaxConnections=85 | MaxConnectionsPerSource=5 | KeepAlive=true | | [Install] | WantedBy=sockets.target | $ cat /etc/systemd/system/rsyncd@.service | [Unit] | Description=rsync daemon | ConditionPathExists=/etc/rsyncd.conf | | [Service] | ExecStart=/usr/bin/rsync --daemon | StandardInput=socket | | [Install] | WantedBy=multi-user.target After a while, systemd runs hot consuming a whole CPU core: | $ top -p 1 | PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND | 1 root 20 0 2057476 251560 6264 R 99.7 0.1 17903:32 systemd strace shows it constantly doing this: | $ sudo strace -p 1 | ... | openat(AT_FDCWD, "/etc/systemd/system/rsyncd@.service", O_RDONLY|O_NOCTTY|O_NOFOLLOW|O_CLOEXEC) = 14 | fcntl(14, F_GETFL) = 0x28000 (flags O_RDONLY|O_LARGEFILE|O_NOFOLLOW) | fstat(14, {st_mode=S_IFREG|0644, st_size=173, ...}) = 0 | fstat(14, {st_mode=S_IFREG|0644, st_size=173, ...}) = 0 | fstat(14, {st_mode=S_IFREG|0644, st_size=173, ...}) = 0 | read(14, "[Unit]\nDescription=rsync daemon\n"..., 4096) = 173 | read(14, "", 4096) = 0 | close(14) = 0 | openat(AT_FDCWD, "/etc/systemd/system/rsyncd@.service", O_RDONLY|O_NOCTTY|O_NOFOLLOW|O_CLOEXEC) = 14 | fcntl(14, F_GETFL) = 0x28000 (flags O_RDONLY|O_LARGEFILE|O_NOFOLLOW) | fstat(14, {st_mode=S_IFREG|0644, st_size=173, ...}) = 0 | fstat(14, {st_mode=S_IFREG|0644, st_size=173, ...}) = 0 | fstat(14, {st_mode=S_IFREG|0644, st_size=173, ...}) = 0 | read(14, "[Unit]\nDescription=rsync daemon\n"..., 4096) = 173 | read(14, "", 4096) = 0 | close(14) = 0 | ^Cstrace: Process 1 detached This is with 237-3ubuntu10.43 on a host running Bionic. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1904369/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp