Unable to connect to JAVA from SAP

Question

Hi
My requirement is ABAP program should call java program through JCO. So i have created RFC destination in SAP machine.
I have created the java and ABAP programs also for the same.
After setting every thing I have executed a function module in ABAP which calls the java program.
This call is executing successfully once or twice out of 10 attempts of execution of the ABAP program.
I am getting below error
"Bean Y_TEST_RFCnot found on host XXXXXXX, ProgId =XXXX:
Can some one tell me why it is failing most of the times?
Regards,
Chaitanya.

Answer 1

Hi thanks for responding back to me.
I am already using unicode property. As i mentioned we are able to connect to RFC destination from ABAP program, but this connection is not consistent. Please check my server class (RFCServer_proj extends JCO.Server)constructor below.
public  RFCServer_proj(String gwhost,String gwserv,String progid,IRepository repository)
               super(gwhost,gwserv,progid,repository);
               this.setProperty("jco.server.unicode", "1");
               JCO.addServerExceptionListener(this);
I am using another class to start the above server.  Please check my server start up code below
private static RFCServer_proj serverConnections[] = new RFCServer_proj[20];
public  static void  startServers()  {
Experian_props props=new Experian_props();
JCO.addClientPool(props.getProperty("jco_pool"),  20, props.getProperty("sap_client"), props.getProperty("sap_user") ,props.getProperty("sap_pwd")  ,props.getProperty("sap_language"),props.getProperty("sap_host") ,props.getProperty("sap_sysnum"));
IRepository repository = JCO.createRepository("REP", props.getProperty("jco_pool"));
for(int i=0;i<CONNECTIONS;i++){
        serverConnections <i> = new RFCServer_proj                                      (props.getProperty("gwhost"), props.getProperty("gwservice"),
                 props.getProperty("progid"),repository);
         serverConnections <i>.start();
Here I am creating connection pool  of 20 and server instances also 20. Intially I used single server instance.... after increasing the instances to 20 then my days become somewhat good. Connection is successful for every RFC call.
But is it correct way of doing?
I have used SAP server name as gateway host, gateway service as "sapgw00".
Do i need to set any thing in RFC destination?