Rules of AEM

 Maven build is failing due to CHECKSUM issue.  AEM Developers, Infrastructure Engineers regularly come across a challenge on building the AEM code & dispatcher module use to get failed while mvn build. The article addresses in a simple way on how to understand the mechanisms of dispatcher module build, and gives a detailed explanation of how it can be resolved.  This is useful for  building the code for a deployment via Pipeline either it is Adobe Cloud manager or Jenkins, you can see this error while your local build itself.  This error is caused, as the dispatcher owner does not not want you to change/modify few of its default files which are marked as immutable in dispatcher server.  You can find full list of immutable files on of dispatcher provided by Adobe.  https://helpx.adobe.com/experience-manager/kb/ams-dispatcher-manual/immutable-files.html Issue :- In AEM while doing the deployment it is being seen , user get the exception , Maven mandatory check failed.  [main] [ERR

AEM DISPATCHER STATFILE UNDERSTANDING & CACHE INVALIDATION:- AEM Developers, Infrastructure Engineers regularly come across a challenge on decoding the statfile and using it efficiently especially statfile becomes highly relevant in a multi-tenanted environment with different project teams controlling different sites. The article addresses in a simple way on how to understand the mechanisms of stat file and gives a detailed explanation of how it can be used in a multi-tenant environment model.  The image for your reference as a quick overview of the data flow, before we take a deep dive.  This article covers - 1 - When dispatcher serves the old version of the content. How to avoid it. 2- Cache invalidation mechanism. Assumption - If you are reading this article, I believe you would have a basic understanding of Dispatcher and it's configuration. Firstly let’s set the initial configuration for the cache invalidation section of the dis