You may observe this error in the event log after upgrading Intermediary from 10.x to a higher version.
<date>2021/06/23 15:08:33.098+0000</date><severity>ERROR</severity><reqid></reqid><thread>qtp267760927-23& lt;/thread><user>Superuser/Superuser</user><runid>1595516834695</runid><subsys>HTTP</subs ys><msgid>HTTP0012</msgid>
<msg>HTTP0012: Rejected too large request (length: 308,716,008) from IP 10.119.xx.xx</msg>
Dcom.actional.filter.maxRequestSize from the Intermediary profile in the Management Server has no effect on this.
This error is caused when the size of the input message exceeds the maximum configured size. The size of the incoming request is mentioned in the error message. You can either:
Dcom.actional.filter.maxRequestSizeto more than the size of the input found in the error message
-Dcom.actional.filter.maxRequestSize=-1to disable the limit.
Restart the Intermediary profile after any of the above changes.
The request that was getting blocked due to exceeding the allowed size should pass through.