Root Cause: We have compared the tomcat configuration files between Stage and Pre-Production environment .
The only difference we found is below request dumper filter which is enabled on STAGE but not on Pre-PROD over /apps_01/webapps/tomcat/conf/<instance_name>/conf/web.xml.
<filter>
<filter-name>requestdumper</filter-name>
<filter-class> org.apache.catalina.filters.RequestDumperFilter
</filter-class>
</filter>
<filter-mapping>
<filter-name>requestdumper</filter-name>
<url-pattern>*</url-pattern>
</filter-mapping>
This configuration gets enabled when we set debug to true over environment.json file as below under SAML section. This is basically sets tomcat’s server.log in debug mode to capture SAML related requests. "SAML": { "enable": true, "debug": true,
Fix: I have set "debug": true, to "debug": false over environment json file and request dumper filter got removed from tomcat’s web.xml post subsequent chef converge. Now POST calls are working perfectly fine over AEM Author instance.
