Thanks @Shashi_Mulugu , but in real time, in which scenario we can use a resource type servlet with paths other than /content ??

@Shashi_Mulugu @krati_garg  Generally, merge mode is used in every project just to update the new content changes, but how can these issues(new content not updating) be resolved when using merge mode?

Its because of workspace filter rules, please check filter.xml file under following path in your project /apps/src/main/content/META-INF/vault/filter.xml, use appropriate mode based upon your use case. Refer https://jackrabbit.apache.org/filevault/filter.html for more information.  

@Saravanan_Dharmaraj Does that mean that even resource type servlet is not useful?   as most of the servlets on websites will be accessed by anonymous users upon CTA or form submission, if there is no use of ACLS for anonymous users through resource type servlet then in which scenarios can we use it...

Thanks for your reply, but, it is not clear mentioned, the actual question is, when there is a requirement to access a resource type servlet by any anonymous user of the website based on some CTA, there is no concept of permissions to that user, in that case how ACLs work? 

Everyone says that resource type servlet is recommended over path type servlet as there will be benefit of ACLs, can someone explain with an example  how ACLs can be achieved and why resource type servlet is best?  

Check if the Uber jar version in main pom.xml is matching with the AEM version which you are using.