How to solve "Size of packet read with SASL security enabled (size) is larger than our buffersize (size)" error in Oracle Database?

In Oracle, the error message "Size of packet read with SASL security enabled (size) is larger than our buffersize (size)" can occur when using SASL to provide secure authentication between client and server applications.

To resolve this issue, you can increase the buffer size by modifying the SQLNET.INBOUND_CONNECT_TIMEOUT parameter in the sqlnet.ora file. This parameter specifies the maximum amount of time that a client's connection request can take to be established with the database server. Increasing this parameter can also increase the buffer size and prevent the error message from occurring.

To modify the SQLNET.INBOUND_CONNECT_TIMEOUT parameter:

Locate the sqlnet.ora file. This file is typically located in the $ORACLE_HOME/network/admin directory.
Open the sqlnet.ora file using a text editor.
Add the following line to the file: SQLNET.INBOUND_CONNECT_TIMEOUT = <timeout value>
Replace <timeout value> with a higher value, such as 180 or 300.
Save and close the file.
Restart the Oracle database server to apply the changes.

If increasing the buffer size does not resolve the issue, you may need to investigate further to determine the root cause of the problem. This could involve reviewing log files, network configurations, or checking for any known issues with the Oracle software version you are using.

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