The OAuth 2.0 protocol allows the users to grant a third-party web site or application access to the user's protected resources without necessarily revealing their long term credentials or even their identity.OAuth 2.0 allows clients to access user’s (resource owner’s) resources on resource servers ...

I dont think it is mandatory to define notnull here. Refer below https://github.com/apache/sling-org-apache-sling-discovery-commons/blob/4f7d7ca3224239d52798cc8418ec8283f5eddc9e/src/main/java/org/apache/sling/discovery/commons/providers/spi/base/IdMapService.java  The @notnull Annotation is, actuall...

Now, it seems to be an issue from gmail side. This typically is an indication that one of the following reasons listed below is affecting your inbox: 1) You have too many concurrent connections/services synched with this email address (Note: Every time you connect an inbox to a service, whether it b...

Have you checked the logs? What error it is giving?For any such issue it is important to find out the root cause and that you can only get it from the logs. So, carefully examine the logs if you don't find any meaning information then enable the debug log and see what error it is showing. 

There are many ways to build the web; most of the ways can be implemented in AEM, which one works best is going to depend on your authors. What the authors are willing to author, how involved do they get with content, and how involved do they want to get with crafting experiences?SPA - single page a...

SMTP not possible on Cloud Service sandbox.

Dont want to debate on this but you yourself given the answer, "However, If you look at /ignoreUrlParam - It will still hit to publisher for the first time - how will it retain from attacking? " True, this is the case for all pages. Once your pages gets cached then with different params also it will...

If debug logs is not the option then try to do the debugging on local by adding break points and see what is causing the issue. Your query, does not have a point to point solution rather you need to do the debugging for this either by debug logs or by adding breakpoints on local to see what is causi...

This sounds strange to me. Make sure all cache is cleared and you are not referring to cached version of a page or serviceAnd post that also if it didn't work then raise support ticket for the same.   

@Julien2 I would suggest you to enable DEBUG logs and see what activities are performed during this time.This is not a apple to apple comparison every system behaves differently but Yes 5 sec lean time is lot. You need to discover more on this issue specially on Debug logs, also make sure system sho...