I have a quick question on using iparsys  - If we use iParsys for creating site header and footer then if there is any change in the iParsys content then are we required to flush the dispatcher cache of all the child pages ? If yes then whats the standard way of flushing the cache of all the pages a...

 I believe your java class extends WCMUse class and you can call getRequest() method to get the request object - https://docs.adobe.com/docs/en/aem/6-0/develop/ref/javadoc/com/adobe/cq/sightly/WCMUse.html#getRequest()

 Yes we raised support ticket with daycare and I think they added these steps on this document now. We are now following the same steps in our project. 

You can use the following category for including your custom JS in TouchUI - cq.authoring.dialog

Check how many instances of asset upload workflows run when you upload an image. It could be the case that two instances of the same workflow are getting triggered because of the duplicate launcher configurations. 

You can call PageManager copy method which allows you to do a recursive copy. You need to pass shallow parameter as 'false' to do a recursive copy. https://docs.adobe.com/docs/en/cq/5-6-1/javadoc/com/day/cq/wcm/api/PageManager.html#copy(com.day.cq.wcm.api.Page, java.lang.String, java.lang.String, bo...

The above documentation is relevant for OOB search component as it uses GQL full text query language for querying the Lucene indexes -  https://jackrabbit.apache.org/api/1.5/org/apache/jackrabbit/commons/query/GQL.html

The search results are ordered by the pseudo property "jcr:score" which is calculated by Lucene.  Whenever you do full text search, the results returned are scored according to their relevancy and all of it is done by Lucene under the hood. You can boost (impact the ranking)  the ranking of the node...

VLT RCP based tools- You can try the recap tool - http://adamcin.net/net.adamcin.recap/. I have tried it in the past and really works well. It uses vlt rcp under the hood but gives a very convenient easy to use interface for syncing nodes.  Another one built by Adobe CS team based on vlt rcp - https...

I think the error you are seeing is because of the footer component included on the page. - /content/acme-global/jcr:content/acme_footer/acmecontent. Check the sling:resourceType of this node and see it it exists in CRX and evaluates to valid resource.