Why are we getting the error message EZZ6012I TELNET BPX1AIO ACCEPT FAILED, RC = 0000007F?

The RC = 0000007F and RSN = 1102024D in message EZZ6012I indicate that the system-wide socket (JRMAXSOCKETS) limit was reached.

The application was opening many sockets, and failing to close them. As a result, the system-wide MAXSOCKETS limit was reached and messages EZZ6012I and EZZ6011I were issued.

If a connect fails with EconnRefused, the application needs to close the socket and open a destination again. If the application tried to connect again on that same socket, the connect will fail with Econnection already in progress. Therefore, the application must have been opening new sockets to try the next connection. It is up to the application to close the socket after the connect fails.

Take the following actions:

• As a temporary workaround, you will need to increase your MAXSOCKETS value significantly. To do this, follow the instructions in the z/OS Unix System Services Planning book.

• Open a service request with the vendor of your application to determine what can be done to prevent it from opening so many sockets without closing them.

• To monitor who is using all the sockets, you can use a tool called zlsof that is invoked from the shell with the -t option. This tool is available at the zlsof on the ftp.software.ibm.com website. You can also use D OMVS,PFS to monitor the socket usage.