MuleSoft Enable Verbose (Debug) Logging for Different Modules in Mule 4

HTTP Connector
How to Enable Debug Trace logs for Salesforce Connector in Mule 3 and Mule 4 (Wire Logging)
FTP, SFTP and FTPS Connectors
Netsuite Connector
Amazon SQS Connector
Microsoft Dynamics 365 Connector
SAP Connector
Anypoint MQ Module
Database Module
How to Enable Mule Batch Debug Logging on Mule 3 and 4

If your Module/Connector is not on the above list, please proceed to do the following:

1. Inspect the Module/Connector dependency on the package explorer left bar. You will have to open the library and inspect its JAR files until finding one with the name of the Module/Connector. Inside that JAR, you can find all Mule-related packages. For instance, for the JMS Module, you will find a mule-jms-connector JAR as on the image below:

2. Add the following entry in your log4j2.xml file:

<Loggers>
    ...
    <AsyncLogger name="<package>" level="DEBUG"/>
    ...
</Loggers>

For example, for the above JMS Module, add:

<Loggers>
    ...
    <AsyncLogger name="org.mule.extensions.jms" level="DEBUG"/>
    ...
</Loggers>

3. Enable HTTP wire logging and add the following AsyncLogger to your log4j2.xml:

<AsyncLogger name="org.apache.http" level="DEBUG"/>

4. If your connector is using HTTPS, then also enable SSL debug.