{"action":"created","issue":{"url":"https://api.github.com/repos/mozilla/rr/issues/1532","labels_url":"https://api.github.com/repos/mozilla/rr/issues/1532/labels{/name}","comments_url":"https://api.github.com/repos/mozilla/rr/issues/1532/comments","events_url":"https://api.github.com/repos/mozilla/rr/issues/1532/events","html_url":"https://github.com/mozilla/rr/issues/1532","id":96965818,"number":1532,"title":"RR Hang in waitpid","user":{"login":"bgirard","id":793565,"avatar_url":"https://avatars.githubusercontent.com/u/793565?v=3","gravatar_id":"","url":"https://api.github.com/users/bgirard","html_url":"https://github.com/bgirard","followers_url":"https://api.github.com/users/bgirard/followers","following_url":"https://api.github.com/users/bgirard/following{/other_user}","gists_url":"https://api.github.com/users/bgirard/gists{/gist_id}","starred_url":"https://api.github.com/users/bgirard/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bgirard/subscriptions","organizations_url":"https://api.github.com/users/bgirard/orgs","repos_url":"https://api.github.com/users/bgirard/repos","events_url":"https://api.github.com/users/bgirard/events{/privacy}","received_events_url":"https://api.github.com/users/bgirard/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-07-24T05:02:00Z","updated_at":"2015-07-24T07:16:07Z","closed_at":null,"body":"I'm seeing a hang in waitpid when trying to run reftest on digitalocean. I added a swap partition and have a larger instance now so there's a total of 4GB (2+2).\r\n\r\n#0  0x00007f64e3e55ee9 in __libc_waitpid (pid=-1, stat_loc=0x7ffd2a9c4dfc, options=1073741826) at ../sysdeps/unix/sysv/linux/waitpid.c:40\r\n#1  0x000000000060105d in Scheduler::get_next_thread(Task*, Switchable, bool*) ()\r\n#2  0x00000000005a7f41 in RecordSession::record_step() ()\r\n#3  0x00000000005a131b in ?? ()\r\n#4  0x00000000005a1561 in RecordCommand::run(std::vector<std::string, std::allocator<std::string> >&) ()\r\n#5  0x0000000000593bea in main ()\r\n\r\nI'm checking with ps -ef but I see no child process:\r\n\r\nmozilla@mozgfx-rr-orange-hunter-1:~$ ps -ef | grep 16312\r\nmozilla  16312 15957  1 00:49 pts/2    00:00:13 /usr/bin/rr /home/mozilla/mozilla-central/tree/obj-x86_64-unknown-linux-gnu/dist/bin/firefox about:blank -foreground -profile /tmp/tmpkFXzYc.mozrunner\r\nmozilla  16694 15585  0 01:01 pts/3    00:00:00 grep 16312"},"comment":{"url":"https://api.github.com/repos/mozilla/rr/issues/comments/124382862","html_url":"https://github.com/mozilla/rr/issues/1532#issuecomment-124382862","issue_url":"https://api.github.com/repos/mozilla/rr/issues/1532","id":124382862,"user":{"login":"rocallahan","id":296135,"avatar_url":"https://avatars.githubusercontent.com/u/296135?v=3","gravatar_id":"","url":"https://api.github.com/users/rocallahan","html_url":"https://github.com/rocallahan","followers_url":"https://api.github.com/users/rocallahan/followers","following_url":"https://api.github.com/users/rocallahan/following{/other_user}","gists_url":"https://api.github.com/users/rocallahan/gists{/gist_id}","starred_url":"https://api.github.com/users/rocallahan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rocallahan/subscriptions","organizations_url":"https://api.github.com/users/rocallahan/orgs","repos_url":"https://api.github.com/users/rocallahan/repos","events_url":"https://api.github.com/users/rocallahan/events{/privacy}","received_events_url":"https://api.github.com/users/rocallahan/received_events","type":"User","site_admin":false},"created_at":"2015-07-24T07:16:07Z","updated_at":"2015-07-24T07:16:07Z","body":"Looks like pid 3958 just disappeared without us getting an exit code via waitpid!\r\n\r\nYou could try enabling the logging in Task.cc and then running with that. The output will be voluminous though."}}