The JSMX_OPEN API is used to open a new connection from the client application to the Java Service Manager. The client may have more than one (up to 100) connections open simultaneously by making multiple calls to JSMX_OPEN.
The server argument is optional for the connection. If the server argument is not supplied, or if the argument value contains blanks, then the remote host and port number is obtained from the data area JSMCLTDTA on IBM i.
The server argument can have any of the following values:
The JSMX_OPEN must be executed before the JSMX_COMMAND can be used.
The JSMX_OPEN Built-In Function performs a DNS lookup to resolve the host name address. Using a dotted decimal IP address does not get around this DNS lookup.
If the JSMX_OPEN Built-In Function is slow to open a connection then you could have a DNS lookup issue. Add an entry to the local host table to improve performance.
TCP/IP connection performance can be improved if the registered DNS servers are available and performing well.
Change TCP/IP Domain
Host name search priority *LOCAL
Domain name server
Internet address 220.127.116.11
If the first Domain Name Server (DNS) in the list does not respond, the second DNS server in the list will be contacted. If the second DNS server does not respond, the third DNS server will be contacted.
See IBM i - Network Performance for further information.