So do you see a problem or its just a question on how omni search work ?

What version of AEM are you running ? What keyword do you type ? i.e. as asset name ?

Check the following repo that can help you to structure your project:https://github.com/ahmed-musallam/AtACE-AEM-Vue

Check this repo ... its old but can help you to get what you are looking for:GitHub - viveksachdeva/elasticsearch-cq: Integration of ElasticSearch with CQ5

the following write up may help you:Limit tags selection to certian number in AEM 6.0 ~ T20mins

Are you saying by default the "error.log" was not getting created ?Can you see this logger in http://host:port/system/console/slinglog

Check Imaging Transcoding Library. This can be something that you need.

It should be straightforward:Adobe Experience Manager Help | Import and manage applications It is a well-formed .xml file ? no syntax error ?

It shows a failed login attempt. Whats special about it ? Do you think this is not a correct entry in the log ?Can you debug for the following package as instructed in the logs:com.adobe.idp.um.businesslogic.authentication

Do you want to process the json output to eliminate the repeating property or you want to get the json output without the repeating property at the first place ?