** Description changed: + [Impact] + iscsid can hang or crash + + [Test Case] + 1) This issue is exacerbated by increased logging output. To configure open-iscsi to emit the maximum amount of messages, edit /etc/init.d/open-iscsi and change the line: + start-stop-daemon --start --quiet --exec $DAEMON + to: + start-stop-daemon --start --quiet --exec $DAEMON -- -d 8 + + On your storage server, create multiple LUN targets and expose them to + your Ubuntu system. I recommend 3 or more. + + Edit the attached repro.sh script to set the TARGET variable to point to + the correct IP of your storage server. Execute this script on your + Ubuntu system. When an error occurs, this script should hang or begin + emitting errors. + + [Regression Potential] + I would expect regressions here to have the same symptoms of the original bug - e.g. hangs, crashes. + + Original report follows. + We occasionally see iscsiadm hang indefinitely on a system. It is difficult to reproduce, there maybe months between occurrences. This happened again today, and we collected the following information. We captured an strace of a failing iscsiadm discover process, I'll attach it here. All iscsiadm processes that are hung are also in recvmsg() when we attach strace. It was observed that there was one iscsid process - where normally there is 2. The pids are normally consecutive, so I presume one forks the other before daemonizing. syslog contains the following messages from iscsid: Sep 20 15:55:57 cn5 iscsid: semop up failed 4 Sep 20 15:56:05 cn5 iscsid: semop down failed Sep 20 15:56:23 cn5 iscsid: semop up failed 4 Sep 20 16:02:23 cn5 iscsid: semop up failed 4 Sep 20 16:02:26 cn5 iscsid: semop up failed 4 Sep 20 16:02:26 cn5 iscsid: semop up failed 4 Sep 20 16:02:26 cn5 iscsid: semop up failed 4 Sep 20 16:02:32 cn5 iscsid: semop up failed 4 Sep 20 18:01:49 cn5 iscsid: semop up failed 4 Sep 20 18:03:56 cn5 iscsid: semop up failed 4 Sep 20 18:05:03 cn5 iscsid: semop up failed 4 This sounds similar to the issue described in https://bugzilla.redhat.com/show_bug.cgi?id=676804, but note the different errno.
** Attachment added: "sample reproduction script" https://bugs.launchpad.net/ubuntu/+source/open-iscsi/+bug/1053306/+attachment/3336393/+files/repro.sh -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1053306 Title: iscsiadm hangs in recvmsg() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/open-iscsi/+bug/1053306/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
