How to solve an error reported when connecting the DB2 client to the server

Why does the DB2 Client Always report SQL30081N when connected to the server? This may be a problem that many people have encountered. Here we will teach you how to solve the problem of DB2 client connection server Errors for your reference.

When you encounter a problem where you cannot connect to DB2, you must first understand the entire layered model. The multi-layered model will involve one or more intermediate layers, which will increase the difficulty of fault locating. In addition, such as the operating system, DB2 version, Patch Level, and communication protocol should also be known.

A basic troubleshooting method is: if an application on the DB2 client encounters a problem, use the DB2 command line to test whether the application can connect to the DB2 server. For a three-tier structure, connect to the DB2 server directly on the middle layer.

Generally, the following information occurs when a communication fault occurs:

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

If the problem persists, it will be better solved. It may be a configuration problem or network communication. If the problem is intermittent, there may be network faults and too few proxies in the connection pool.

If you encounter a problem on the remote DB2 client, first test whether the Server can be connected to the DB2 Server locally. If the connection still fails, check whether the DB2 Server works normally. If the connection is available, it indicates that the network communication is faulty or the remote client configuration is incorrect.

Check the server configuration as follows:

Verify the existing DB2 database
Db2 list db directory
Db2 list db directory show detail
Verify the communication protocol used by the instance and view the DB2COMM variable.
Db2set-all
View the configuration of the Database Manager and view the SVCENAME, which is specific to the tcpip protocol)
Db2 get dbm cfg
Check whether/etc/services has a port corresponding to the SVCENAME above, for example:
Db2cdb250000/tcp

To check whether the server is listening, use netstat-an to check whether the port is in the LISTEN status.

Check the client configuration as follows:

Verify remote server instance Configuration
Db2 list node directory
Db2 list node directory show detail
Ping hostname to Verify communication
Use telnet hostname port to verify the connection to the instance

In addition, DB2 provides a PCT tool to solve communication faults. If the above method has not solved your problem, please refer to relevant materials to use it.

Learn about the DB2 lock types

Solution to db2 tablespace lock

SQL statement for creating tables in DB2 with Constraints

It is not allowed to set the db2 primary key to solve the problem.

How to Create a tablespace in DB2