We have a number of Version 6 TSM servers running under zSeries Linux. These were installed with 6.2.2.0 server code and subsequently upgraded to 6.2.5.0.
We had 'backup stgpool' processes hang one day last week. The hung processes had to wait a couple of hours for tape drives to become available, but did not move any data even when tape drives became available. The processes were on a library manager client, and there is a firewall between that TSM server and the library manager. The TCP connections requesting tape drives for the 'backup stgpool' processes were severed by the firewall because of inactivity timeouts. The timeouts should have been prevented by the line: export LD_PRELOAD=/usr/lib/libkeepalive.so in the .profile file for the instance user. This line would have forced the use of a wrapper for the routine that opens TCP connections. The wrapper would have enabled the transmission of keep-alive packets over otherwise idle connections. The 'export' was missing. Our local documentation for the TSM configuration indicates that the 'export' was originally placed after the lines introduced with the comment: # The following three lines have been added by IBM DB2 instance utilities. Is it possible that the 6.2.5.0 installer removed everything after that comment (including the 'export') and wrote replacements for the lines added by the 6.2.2.0 installer, but did not replace the 'export'? Thomas Denier Thomas Jefferson University Hospital
