Public bug reported: After a few hours of working today I started wondering what was consuming my battery:
%CPU %MEM TIME+ COMMAND 100,0 0,5 167:06.10 appstreamcli "appstreamcli refresh" is running according to ps. I need to kill it in order to continue sanely so I may not be getting all the necessary debugging out of it, but here's something. sudo gdb -p to the process, continue, break and backtrace: 0x00007f14285f9b23 in yaml_parser_parse () from /usr/lib/x86_64-linux-gnu/libyaml-0.so.2 (gdb) bt #0 0x00007f14285f9b23 in yaml_parser_parse () from /usr/lib/x86_64-linux-gnu/libyaml-0.so.2 #1 0x00007f1429ea9c4c in as_yamldata_parse_distro_data () from /usr/lib/x86_64-linux-gnu/libappstream.so.3 #2 0x00007f1429eab537 in as_metadata_parse_yaml () from /usr/lib/x86_64-linux-gnu/libappstream.so.3 #3 0x00007f1429eabc55 in as_metadata_parse_file () from /usr/lib/x86_64-linux-gnu/libappstream.so.3 #4 0x00007f1429eaed49 in as_data_pool_update () from /usr/lib/x86_64-linux-gnu/libappstream.so.3 #5 0x00007f1429ea4272 in as_cache_builder_refresh () from /usr/lib/x86_64-linux-gnu/libappstream.so.3 #6 0x00000000004049de in ascli_refresh_cache () #7 0x0000000000403ceb in as_client_run () #8 0x00007f1429ad2830 in __libc_start_main (main=0x403490 <main>, argc=2, argv=0x7fff509d0768, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff509d0758) at ../csu/libc-start.c:291 #9 0x0000000000403519 in _start () And seems to fluctuate between eg yaml_event_delete, yaml_parser_parse, but it seems to be stuck in that as_yamldata_parse_distro_data. Strace does not seem to output anything when attaching, or I'm doing something wrong: $ sudo strace -p 14708 strace: Process 14708 attached strace: [ Process PID=14708 runs in x32 mode. ] ^Cstrace: Process 14708 detached I have a snapshot of /var/cache/app-info in store if needed. Nothing under xapian/ has timestamp newer than 3h ago when the process had started, and xmls/fwupd.xml is over an hour old too. ** Affects: appstream (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1583973 Title: appstream refresh stuck at 100% CPU on xenial To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/appstream/+bug/1583973/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs