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Known Errors
These are the known errors in our products, logged as reported with versions and platforms affected as well as corrections and work-arounds.
This list is largely historical, since it records all problems that have been reported throughout G&R history. Only the most recently reported problems still exist, unless you are using a very old copy of the product, in which case you should update the product to the most recent version.
The G&R DSA listener (nl_dsa) is used to accept incoming connects to a Host Links platform, usually to GUFT or Gspool configured to start-on- demand. If the OCS (communications) server is taken down before taking down TDS on GCOS7 it does not terminate remote TCP/IP sessions, including DSA sessions running over TCP/IP (RFC1006). TDS is often taken down this way to preserve user context. If the TDS application has opened print sessions to start-on-demand instances of Gspool the sessions would remain open on the Gspool side. When TDS is restarted the print sessions are reopened, but for the Host Links Listener these looked like new connects, and so the Listener started a new instance of each Gspool. Eventually after several restarts of TDS the maximum number of incoming sessions supported by the Listener would be exceeded, resulting in reject of new sessions. The listener now turns on KEEP-ALIVE on the RFC1006 port. The TCP/IP stack on the Host Links platform now sends a keep-alive packet every keep-alive interval (default 2 hours). If these are not answered the session is aborted and the start-on-demand service terminates. Note that a stop and then immediate restart of TDS will not be detected. New instances of Gspool will be started, but the old instances will terminate when their keep-alive interval expires. The workarounds depend on the situation. In the command line configured for start-on-demand you can set the Gline parameter -ii nnn to disconnect the session if it has been idle for nnn minutes. Alternatively you need to stop and restart the Listener before taking TDS up again. The stop/start of the Listener is always necessary if you stop TDS and take it up again immediately, and want to avoid duplicate instances of Gspool being started, with old ones living for the keep- alive interval.
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