OK, as expected, this bit again. As noted, this is not at all rare!
$ sudo apt update Reading package lists... Done E: Could not get lock /var/lib/apt/lists/lock. It is held by process 810491 (apt-get) N: Be aware that removing the lock file is not a solution and may break your system. E: Unable to lock directory /var/lib/apt/lists/ $ ps aux|grep apt root 810459 0.0 0.0 2800 1588 ? Ss May16 0:00 /bin/sh /usr/lib/apt/apt.systemd.daily update root 810463 0.0 0.0 2800 1592 ? S May16 0:00 /bin/sh /usr/lib/apt/apt.systemd.daily lock_is_held update root 810491 0.0 0.0 32400 20328 ? S May16 0:40 apt-get -qq -y update _apt 810501 0.0 0.0 25440 8092 ? S May16 0:00 /usr/lib/apt/methods/http _apt 810502 0.0 0.0 25504 7880 ? S May16 0:00 /usr/lib/apt/methods/http _apt 810503 0.0 0.0 25376 7516 ? S May16 0:00 /usr/lib/apt/methods/https _apt 810504 0.0 0.0 29476 12828 ? S May16 0:00 /usr/lib/apt/methods/https _apt 810576 0.0 0.0 18284 5392 ? S May16 0:00 /usr/lib/apt/methods/gpgv _apt 810755 0.0 0.0 26796 12696 ? t May16 0:00 /usr/lib/apt/methods/store Here's a backtrace: TRACEBACKS FOR PID 810576 Thread 1 (Thread 0x7f2f4c662880 (LWP 810576) "gpgv"): #0 0x00007f2f4cc5ac3e in __GI___select (nfds=1, readfds=0x7ffc682d9280, writefds=0x0, exceptfds=0x0, timeout=0x0) at ../sysdeps/unix/sysv/linux/select.c:69 #1 0x00007f2f4d0e638c in WaitFd(int, bool, unsigned long) () from /lib/x86_64-linux-gnu/libapt-pkg.so.6.0 #2 0x00007f2f4d09b0f3 in pkgAcqMethod::Run(bool) () from /lib/x86_64-linux-gnu/libapt-pkg.so.6.0 #3 0x0000582b689849fe in ?? () #4 0x00007f2f4cb5e1ca in __libc_start_call_main (main=main@entry=0x582b689848b0, argc=argc@entry=1, argv=argv@entry=0x7ffc682d9798) at ../sysdeps/nptl/libc_start_call_main.h:58 #5 0x00007f2f4cb5e28b in __libc_start_main_impl (main=0x582b689848b0, argc=1, argv=0x7ffc682d9798, init=<optimised out>, fini=<optimised out>, rtld_fini=<optimised out>, stack_end=0x7ffc682d9788) at ../csu/libc-start.c:360 #6 0x0000582b68984b85 in ?? () [Inferior 1 (process 810576) detached] (I tried to get one for each process, but I accidentally did the same one 6 times, then killed it before I realised my mistake. Apologies.) It looks like my suspicion was correct: The application is stuck waiting on a network call that'll never return. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2109495 Title: unattended-upgrades can (and regularly does) pause mid-update indefinitely with no error or feedback To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/2109495/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
