Description of problem:

If any targets are unreachable, and you try an "iscsi reload", the command will
hang indefinately.  

I came up with another simple script that issues the kill session command, and
seems to work ok in the session hangs I found.  I'll attach the script and let
you all decide whether you think this is ok to include or not - seems to meet my
needs but you may have issues with including it.  Also, for this particular
problem, there may be other more elegant solutions but I thought the simple
script was worth mentioning since it solved my problems.

Note that the README states how to shutdown sessions (see below), but having a
simple utility do it seems worth considering.

  Note that any configuration changes will not affect existing target sessions.
  For example, removal of a DiscoveryAddress entry from /etc/iscsi.conf
  will not cause the removal of sessions to targets discovered through this
  DiscoveryAddress, but it will cause the removal of the discovery session
  corresponding to the deleted DiscoveryAddress.
  To remove these sessions execute the following for each of these sessions:
  - Set ConnFailTimeout, ResetTimeout and AbortTimeout on the session to a low
    value, like 5 seconds through sysfs by executing the following commands:
    echo 5 > /sys/class/scsi_host/host<host_no>/connfail_timeout
    echo 5 > /sys/class/scsi_host/host<host_no>/reset_timeout
    echo 5 > /sys/class/scsi_host/host<host_no>/abort_timeout
  - Stop IOs to all the devices discovered through the session.
  - If these devices have been mounted, unmount them.
  - Shutdown the session through sysfs by executing the following command:
    echo > /sys/class/scsi_host/host<host_no>/shutdown
    where <host_no> is the Host Number of the session that has to be removed.



Version-Release number of selected component (if applicable):
iscsi-initiator-utils-4.0.3.0-2

How reproducible:
Every time

Steps to Reproduce:
1. Enter DiscoveryAddress=IP1 into /etc/iscsi.conf
2. /etc/init.d/iscsi start
3. Add DiscoveryAddress=IP2 in /etc/iscsi.conf
4. Somehow make target on IP1 unreachable (pull cable, stop iscsi on target
side, etc)
5. /etc/init.d/iscsi reload *command hang*
  
Actual results:
"/etc/init.d/iscsi reload" hangs indefinately

Expected results:
"/etc/init.d/iscsi reload" should not hang indefinately

Additional info: