com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to SAP

[Former Member]

Hi guys,

I have tried some sample code in Jco. For this I have created a java project and created a java class ConnectionPool

import com.sap.mw.jco.*;

public class ConnectionPool extends Object

{

static final String POOL_NAME = "Pool";

JCO.Client mConnection;

public ConnectionPool() {

try {

JCO.Pool pool = JCO.getClientPoolManager().getPool(POOL_NAME);

if (pool == null) {

OrderedProperties logonProperties =

OrderedProperties.load("/logon.properties");

JCO.addClientPool(POOL_NAME, // pool name

5, // maximum number of connections

logonProperties); // properties

}

mConnection = JCO.getClient(POOL_NAME);

System.out.println(mConnection.getAttributes());

}

catch (Exception ex) {

ex.printStackTrace();

}

finally {

JCO.releaseClient(mConnection);

}

}

public static void main (String args[]) {

ConnectionPool app = new ConnectionPool();

}

}

And I have created OrderedProperties.java class to read the logon.properties

public class OrderedProperties extends java.util.Properties

{

ArrayList orderedKeys = new ArrayList();

public OrderedProperties()

{

super();

}

public OrderedProperties(java.util.Properties defaults)

{

super(defaults);

}

public synchronized Iterator getKeysIterator()

{

return orderedKeys.iterator();

}

public static OrderedProperties load(String name)

throws IOException

{

OrderedProperties props = null;

java.io.InputStream is =

OrderedProperties.class.getResourceAsStream(name);

if ( is != null )

{

props = new OrderedProperties();

props.load(is);

return props;

} else

{

if ( ! name.startsWith("/") )

{

return load("/" + name);

} else {

throw new IOException("Properties could not be loaded.");

}

}

}

public synchronized Object put(Object key, Object value)

{

Object obj = super.put(key, value);

orderedKeys.add(key);

return obj;

}

}

And a logon.properties simple file with these client credentials

jco.client.client

jco.client.user

jco.client.passwd

jco.client.ashost

jco.client.sysnr

I m getting this error

com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to SAP gateway failed

Connect_PM GWHOST=172.18.3.81, GWSERV=sapgw95, ASHOST=172.18.3.81, SYSNR=95

LOCATION CPIC (TCP/IP) on local host

ERROR partner not reached (host 172.18.3.81, service 3395)

TIME Fri Sep 21 17:28:54 2007

RELEASE 640

COMPONENT NI (network interface)

VERSION 37

RC -10

MODULE nixxi_r.cpp

LINE 8672

DETAIL NiPConnect2

SYSTEM CALL SiPeekPendConn

ERRNO 10060

ERRNO TEXT WSAETIMEDOUT: Connection timed out

COUNTER 1

at com.sap.mw.jco.rfc.MiddlewareRFC$Client.nativeConnect(Native Method)

at com.sap.mw.jco.rfc.MiddlewareRFC$Client.connect(MiddlewareRFC.java:1098)

at com.sap.mw.jco.JCO$Client.connect(JCO.java:2983)

at com.sap.mw.jco.JCO$Pool.initPool(JCO.java:4375)

at com.sap.mw.jco.JCO$PoolManager.getClient(JCO.java:5748)

at com.sap.mw.jco.JCO$PoolManager.getClient(JCO.java:5703)

at com.sap.mw.jco.JCO.getClient(JCO.java:7931)

at ConnectionPool.<init>(ConnectionPool.java:30)

at ConnectionPool.main(ConnectionPool.java:41)

[Former Member · Accepted solution]

Hi,

First check your connection to the SAP server (ping IP-Address). If it works check your etc/services file that there is an entry for the gateway you want to connect to.

You should have following entries:

sapgw<SYSNO> 32<SYSNO>/tcp

sapdp<SYSNO> 33<SYSNO>/tcp

sapmsy<SID> 36<SYSNO>/tcp

And there must be a blank line at the end of the file!!!!

Regards,

Daniel

[Former Member]

Hi,

I am able to ping the ip address, and a following entry sapdp and sapgw entries are there in my service file but I am not able to find sapmsy. But can you clarify what are these 32,33,36 and sapgw,sapdp,sapmsy, jus to get more info on it. Still I am unable to connect to sap gateway.

Kindly help

Regards,

PP

[Former Member]

btw wht is etc/services file??

[Former Member]

no im unbale 2 ping the IP adress fro my system but i can from my collegues's system.but i have 2 work on my system so canu help wht setting i have 2 confgure in order to work on my system