RFC JCo 3 unable to connect to SAP AS with sapgw01 service

Question

Greetings - help is greatly appreciated.
I have an RFC server that uses JCo 3.0.5 to connect to the SAP Application server.  When the RFC server is run from a Unix system the gateway service and port needs to be added to the unix systems /etc/services file.  We have two (actually 21) sap systems, one has a gateway service id of sapgw00, the other sapgw01.  We added both gateway services with port 3300 to the Unix /etc/systems file and are able to connect to the sapgw00 system but not the sapgw01 system.  The sapgw01 system is returning the following error.  Without sapgw01 in the /etc/services file we get a different error - so it's doing something.
Thanks in advance
Status: Server FLRFCSRV state changed from [STOPPED] to [STARTED]
>>> Exception error occurred on FLRFCSRV connection null
com.sap.conn.jco.JCoException: (129) JCO_ERROR_SERVER_STARTUP: Server startup failed at Thu Apr 29 09:16:10 CDT 2010.
This is caused by either a) erroneous server settings, b) the backend system has been shutdown, c) network problems.
Could not start server: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:10 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     1
        at com.sap.conn.jco.rt.DefaultServer.openConnection(DefaultServer.java:1168)
        at com.sap.conn.jco.rt.DefaultServer.openConnections(DefaultServer.java:1057)
        at com.sap.conn.jco.rt.DefaultServer.adjustConnectionCount(DefaultServer.java:1004)
        at com.sap.conn.jco.rt.DefaultServerManager$DispatcherWorker.run(DefaultServerManager.java:299)
        at java.lang.Thread.run(Thread.java:619)
Caused by: com.sap.conn.jco.JCoException: (129) JCO_ERROR_SERVER_STARTUP: Could not start server: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:10 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     1
        at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcServer.accept(MiddlewareJavaRfc.java:2135)
        at com.sap.conn.jco.rt.ServerConnection.accept(ServerConnection.java:380)
        at com.sap.conn.jco.rt.DefaultServer.openConnection(DefaultServer.java:1149)
        ... 4 more
Caused by: RfcException: [null]
    message: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:10 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     1
    Return code: RFC_FAILURE(1)
    error group: 102
    key: RFC_ERROR_COMMUNICATION
        at com.sap.conn.rfc.engine.RfcIoControl.error_end(RfcIoControl.java:255)
        at com.sap.conn.rfc.engine.RfcIoControl.ab_rfcaccept(RfcIoControl.java:43)
        at com.sap.conn.rfc.api.RfcApi.RfcAccept(RfcApi.java:41)
        at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcServer.accept(MiddlewareJavaRfc.java:2121)
        ... 6 more
Status: Server FLRFCSRV state changed from [STARTED] to [DEAD]
>>> Exception error occurred on FLRFCSRV connection null
com.sap.conn.jco.JCoException: (129) JCO_ERROR_SERVER_STARTUP: Server startup failed at Thu Apr 29 09:16:12 CDT 2010.
This is caused by either a) erroneous server settings, b) the backend system has been shutdown, c) network problems. Will try next .
Could not start server: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:12 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     2
        at com.sap.conn.jco.rt.DefaultServer.openConnection(DefaultServer.java:1168)
        at com.sap.conn.jco.rt.DefaultServer.openConnections(DefaultServer.java:1057)
        at com.sap.conn.jco.rt.DefaultServer.adjustConnectionCount(DefaultServer.java:1004)
        at com.sap.conn.jco.rt.DefaultServerManager$DispatcherWorker.run(DefaultServerManager.java:299)
        at java.lang.Thread.run(Thread.java:619)
Caused by: com.sap.conn.jco.JCoException: (129) JCO_ERROR_SERVER_STARTUP: Could not start server: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:12 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     2
        at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcServer.accept(MiddlewareJavaRfc.java:2135)
        at com.sap.conn.jco.rt.ServerConnection.accept(ServerConnection.java:380)
        at com.sap.conn.jco.rt.DefaultServer.openConnection(DefaultServer.java:1149)
        ... 4 more
Caused by: RfcException: [null]
    message: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:12 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     2
    Return code: RFC_FAILURE(1)
    error group: 102
    key: RFC_ERROR_COMMUNICATION
        at com.sap.conn.rfc.engine.RfcIoControl.error_end(RfcIoControl.java:255)
        at com.sap.conn.rfc.engine.RfcIoControl.ab_rfcaccept(RfcIoControl.java:43)
        at com.sap.conn.rfc.api.RfcApi.RfcAccept(RfcApi.java:41)
        at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcServer.accept(MiddlewareJavaRfc.java:2121)
        ... 6 more
A startup error occurred - please view the log file for additional information
>>> Exception error occurred on FLRFCSRV connection null
com.sap.conn.jco.JCoException: (129) JCO_ERROR_SERVER_STARTUP: Server startup failed at Thu Apr 29 09:16:18 CDT 2010.
This is caused by either a) erroneous server settings, b) the backend system has been shutdown, c) network problems. Will try next .
Could not start server: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:18 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     3
        at com.sap.conn.jco.rt.DefaultServer.openConnection(DefaultServer.java:1168)
        at com.sap.conn.jco.rt.DefaultServer.openConnections(DefaultServer.java:1057)
        at com.sap.conn.jco.rt.DefaultServer.adjustConnectionCount(DefaultServer.java:1004)
        at com.sap.conn.jco.rt.DefaultServerManager$DispatcherWorker.run(DefaultServerManager.java:299)
        at java.lang.Thread.run(Thread.java:619)
Caused by: com.sap.conn.jco.JCoException: (129) JCO_ERROR_SERVER_STARTUP: Could not start server: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:18 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     3
        at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcServer.accept(MiddlewareJavaRfc.java:2135)
        at com.sap.conn.jco.rt.ServerConnection.accept(ServerConnection.java:380)
        at com.sap.conn.jco.rt.DefaultServer.openConnection(DefaultServer.java:1149)
        ... 4 more
Caused by: RfcException: [null]
    message: Connect to SAP gateway failed
Connect parameters: TPNAME=FLRFCSRV GWHOST=sapd2srv GWSERV=sapgw01
ERROR       partner '10.165.67.157:sapgw01' not reached
TIME        Thu Apr 29 09:16:18 2010
RELEASE     720
COMPONENT   NI (network interface)
VERSION     40
RC          -10
MODULE      nixxi.cpp
LINE        3253
DETAIL      NiPConnect2: 10.165.67.157:3300
SYSTEM CALL connect
ERRNO       239
ERRNO TEXT  Connection refused
COUNTER     3
    Return code: RFC_FAILURE(1)
    error group: 102
    key: RFC_ERROR_COMMUNICATION
        at com.sap.conn.rfc.engine.RfcIoControl.error_end(RfcIoControl.java:255)
        at com.sap.conn.rfc.engine.RfcIoControl.ab_rfcaccept(RfcIoControl.java:43)
        at com.sap.conn.rfc.api.RfcApi.RfcAccept(RfcApi.java:41)
        at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcServer.accept(MiddlewareJavaRfc.java:2121)
        ... 6 more

Answer 1

Hello Sir,
I am a student who is pursuing a project that deals with JCo 3.
I read your question on the forum and think that you have done the JCo stuff and can answer my questions.
Kindly, try to shed some light on following question:
Q1: I simply want to start with connecting my SAP system. I have a user ID and password for the same.
I saw some examples where they use "JCo.createClient(....)" and "JCo.client.connect()" to simply connect the client but
when I type in the code it shows me an error, because they are using package "com.sap.mw.jco" but since I am using JCo3,
I don't have that package instead I have "com.sap.conn.jco" which do not have createClient function.
Q2: By setting the classpath for "sapjco.jar" I was able to compile one of the sample programs but could not run it. Do you
know how to run the SAP JCo program.
Your guidance will be highly appreciated
-Thanks
-Dmukhi