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Status Future consideration
Categories z/TPF
Created by Guest
Created on Mar 13, 2024

Add a warning message when the Network Services Database rejects socket connections due to Max connection value

In order to more rapidly troubleshoot and resolve production network and connection issues, updating the TCP/IP Network Services Database code to issue a warning message to the console when the NSD limit rejects an inbound or outbound connection could greatly reduce time to resolve connection issues or identify connections that are maxing out socket resources. The console warnings would need to be throttled at 1 message every x minutes and display the NSD Name/Application, Port number, and the number of connections rejected to see how big an issue it is over time. The specific issue this is addressing was an outbound Java Kafka client connection which had reached it's max limint defined in the NSD but the Java JAMS0002W connection error console warning message and the stderr.log connection exception: connection refused warning message didn't provide enough information to identify the issue as related to the NSD max limit.  The IP trace also did not conclusively point to the issue since the NSD was rejecting the socket connection prior to getting to the TCP/IP open socket level and traffic was still flowing over the sockets that were allowed to be opened under the NSD max limit.  An NSD max limit reached warning message to go along wtih the Kafka warnings would have immediately pointed to the casue and the issue could have resolved in hours instead of days.   This new warning message would benefit any inbound or outbound issues related to the NSD max limit whether it was Kafka or REST or proprietary socket connections with NSD max limits set.

Idea priority Low