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Status Not under consideration
Workspace Informix
Components Informix Server
Created by Guest
Created on May 31, 2016

RELATED IDEAS

Log DRDA listener messages to online.log similar to current logging of the SQLI listener.

The DRDA listener (drsoctcp) is not logging any error messages to the online.log. The SQLI listener (onsoctcp) does log messages when, for example a wrong username is being used to connect to the instance:

15:45:00 listener-thread: err = -951: oserr = 0: errstr = wrong_user@hostname: Incorrect password or user wrong_user@hostname is not known on the database server.

When the same test is done using drsoctcp, there is no message generated in the online.log. This difference makes tracing problems confusing for the DBA.

The listener also won't report errors/messages whenever garbage is being sent over the connection. When you connect to the onsoctcp listener using telnet and disconnect the session, or when you send some random characters the listener will generate the following messages:

15:49:39 listener-thread@soc_be.c:3073: err = -25582: oserr = 4: errstr = from 192.168.190.1 to server ids1210_tcp : Network connection is broken.
System error = 4.
15:49:57 listener-thread@asfslsqi.c:1484: err = -408: oserr = 0: errstr = from 192.168.190.1 to server ids1210_tcp : Invalid message type received from the sqlexec process.


In the case of the drsoctcp listener, again no messages are being reported. These messages are very useful when somebody is scanning/probing the database server ports.

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