AppleShare Users Disconnected from Xinet Shared Volumes at the Same Time

Overview

You notice that all AppleShare users were disconnected from a Xinet shared volume at the same time. When reviewing the at_log, the following error messages are seen:

• ksd(): Errno 32 on TCP send to <IP address>
• ksd(): TCP Session "<IP address>" timed out (Client crashed?)​
• ksd(): TCP Session <IP address> closed - 50 bad receives (Client crashed?)​
• ksd(): TCP Session <IP address> closed - read error 110 (Client crashed?)
• ​ksd(): TCP Session <IP address> closed - read error 104 (Client crashed?)​

Solution

This behavior is most often related to a networking issue, however, there are a number of reasons why a connection will reset in this way. For example, switching between network interfaces, DHCP reconfigurations, rebooting a firewall, general packet corruption, misrouting, etc.

When seeing these errors, it can most often be traced to rogue/orphaned ksd processes that have failed to close.

1. Stop the Xinet Services:

   # /usr/etc/appletalk/atinit halt

2. Search for rogue ksd services still running:
   

   # ps -edf | grep ksd

   1. Example Output:

      1. [root@localhost xinet]# ps -edf | grep ksd
         root 2862 1 0 Apr16 ? 00:00:00 /usr/etc/appletalk/ksd -f -v -o -i -longcomm ip-address
         root 2870 2862 0 Apr16 ? 00:00:00 /usr/etc/appletalk/ksd -f -v -o -i -longcomm ip-address
         wnv 2871 2862 0 Apr16 ? 00:00:05 /usr/etc/appletalk/ksd -f -v -o -i -longcomm ip-address
         root 10803 2862 0 Apr18 ? 00:00:00 /usr/etc/appletalk/ksd -f -v -o -i -longcomm ip-address
         root 10977 2862 0 Apr18 ? 00:00:01 /usr/etc/appletalk/ksd -f -v -o -i -longcomm ip-address
         root 21946 21936 0 12:31 pts/0 00:00:00 grep --color=auto ksd

      2. Note: The main KSD process highlighted (with PID 2862 on the output above) would be the parent of all other spawned KSD processes.
3. Once located, you can use the "kill" command on the rogue ksd processes PID to properly unregister it:

   # kill <PID>

4. Restart the Xinet Services:

   # /usr/etc/appletalk/atinit start