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Asked: 2026-06-07T00:08:47+00:00

I have absolutely no experience with AS400 DB2 so please forgive any glaring mistakes

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I have absolutely no experience with AS400 DB2 so please forgive any glaring mistakes as I am learning as I go along. I have 2 boxes I can connect to running v5r3 or v4r3. and I am using NHibernate 3. However, when I try and connect I keep getting the following exception :-

ERROR [08001] [IBM] SQL30081N  A communication error has been detected. 
Communication protocol being used: "TCP/IP".  Communication API being used: "SOCKETS".  
Location where the error was detected: "192.168.1.11".  Communication function detecting the error: "connect".  Protocol specific error code(s): "10061", "*", "*".  SQLSTATE=08001

Below is my NHibernate configuration file:-

<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
    <session-factory>
        <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
        <property name="dialect">NHibernate.Dialect.DB2400Dialect</property>
        <property name="connection.driver_class">NHibernate.Driver.DB2Driver</property>
        <property name="connection.connection_string">Server=192.168.1.11;Database=TESTDB;UID=XXX;PWD=XXX;          </property>
        <property name="proxyfactory.factory_class">NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property>
        <property name="command_timeout">15000</property>
        <property name="current_session_context_class">thread_static</property>
    </session-factory>
</hibernate-configuration>

I am not sure if this is because the versions of AS400 are too early? my nhibernate configuration is incorrect? or I have something set up incorrectly on the AS400 itself.

Any advice would be most appreciated.

Many thanks in advance

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1 Answer

  1. Editorial Team

    There are two types of database connections available on the IBM i – DRDA and DDM. DRDA is used for native connections (DB2.Net.iSeries) and DDM is used for DB/2 LUW (DB2.Net, DB/2 Connect) connections.

    DRDA

    Verify the database host server running:

    WRKACTJOB SBS(QSERVER) JOB(QZDASRVSD)

    Check the port status:

    NETSTAT OPTION(*CNN), hit F2 and verify ports 449, 8470, 8471 and 8476 are in state Listen.

    Start the database host server with the command: 

    STRHOSTSVR SERVER(*DATABASE)

    DDM

    Verify the ddm tcp server is running:

    WRKACTJOB SBS(QSYSWRK) JOB(QRWTLSTN)

    Check the port status:

    NETSTAT *CNN, hit F2 and verify port 446 is in state Listen.

    Start the ddm tcp server with the command:

    STRTCPSVR SERVER(*DDM)

    Include the ddm port number in your connection string:

    Server=192.168.1.11:446;Database=TESTDB;UID=XXX;PWD=XXX;

    This IBM Redbook should provide more information:

    Integrating DB2 Universal Database for iSeries with Microsoft ADO .NET

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