iscsi over HAST backed storage partial success

[Kevin Day]

I'm running istgt (iscsi target) using HAST backed storage. For the most part, it seems to work really well. I have ucarp running to change the IP that istgt is bound to, and modified the ucarp scripts to start/stop istgt depending on which side is the master. If I shut down the primary, the secondary takes over and all seems well.

However, if I reboot the secondary, the primary starts freezing up for long periods:

Mar  9 22:46:27 cs04 hastd: [iscsi1] (primary) Unable to r: Socket is not connected.
Mar  9 22:46:27 cs04 hastd: [iscsi1] (primary) Unable to co: Connection refused.
Mar  9 22:46:42 cs04 last message repeated 3 times
Mar  9 22:46:53 cs04 istgt[14298]: ABORT_TASK
Mar  9 22:47:35 cs04 last message repeated 3 times
Mar  9 22:48:02 cs04 hastd: [iscsi1] (primary) Unable to co: Operation timed out.
Mar  9 22:48:02 cs04 istgt[14298]: CmdSN(45748), OP=0x2a, ElapsedTime=74 cleared 
Mar  9 22:48:02 cs04 istgt[14298]: istgt_iscsi.c: 640:istgt_iscsi_write_pdu: ***ERROR*** iscsi_write() failed (errno=32)
Mar  9 22:48:02 cs04 istgt[14298]: istgt_iscsi.c:3327:istgt_iscsi_op_task: ***ERROR*** iscsi_write_pdu() failed
Mar  9 22:48:02 cs04 istgt[14298]: istgt_iscsi.c:3867:istgt_iscsi_execute: ***ERROR*** iscsi_op_task() failed  
Mar  9 22:48:02 cs04 istgt[14298]: istgt_iscsi.c:4337:worker: ***ERROR*** iscsi_execute() failed
Mar  9 22:48:02 cs04 istgt[14298]: CmdSN(490802), OP=0x2a, ElapsedTime=73 cleared
Mar  9 22:48:02 cs04 istgt[14298]: CmdSN(28387), OP=0x2a, ElapsedTime=73 cleared 
Mar  9 22:48:14 cs04 istgt[14298]: ABORT_TASK
Mar  9 22:48:52 cs04 last message repeated 2 times
Mar  9 22:49:22 cs04 hastd: [iscsi1] (primary) Unable to co: Operation timed out.

As soon as the secondary comes back online, everything starts behaving again and all is well.

Is this expected behavior at this point, or should hastd not block like this?

-- Kevin