[Bug 1053306] Re: iscsiadm hangs in recvmsg()
Ante Karamatić
1053306 at bugs.launchpad.net
Thu Sep 20 17:58:29 UTC 2012
Broken:
stat("/sys/bus/iscsi_transport/devices/tcp", 0x7fff6decee10) = -1 ENOENT (No such file or directory)
stat("/sys/class/iscsi_transport/tcp", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_FILE, path=@"ISCSIADM_ABSTRACT_NAMESPACE"}, 110) = 0
write(3, "\10\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 5280) = 5280
recvfrom(3, 0x7fff6dece3e0, 2464, 256, 0, 0) = ? ERESTARTSYS (To be restarted)
Normal:
stat("/sys/bus/iscsi_transport/devices/tcp", 0x7fffc7c20500) = -1 ENOENT (No such file or directory)
stat("/sys/class/iscsi_transport/tcp", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
socket(PF_FILE, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_FILE, path=@"ISCSIADM_ABSTRACT_NAMESPACE"}, 110) = 0
write(3, "\10\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 5280) = 5280
recvfrom(3, "\10\0\0\0\0\0\0\0iqn.1993-08.org.debian:0"..., 2464, MSG_WAITALL, NULL, NULL) = 2464
'iqn.1993-08.org.debian...' is defined in
/etc/iscsi/initiatorname.iscsi.
So far, I'm unable to reproduce the issue.
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https://bugs.launchpad.net/bugs/1053306
Title:
iscsiadm hangs in recvmsg()
Status in “open-iscsi” package in Ubuntu:
New
Bug description:
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.
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