How to make bulkInsert with java client(1.8)

I want to do bulkUpsert using couchbase version (4.1.0-5005 Community Edition) asynchronously.
For example if i want to insert 100 documents, and 80 documents get inserted successfully, i want to know the detail about the remaining 20 documents.
Like which documents upsert failed with the exception or the error why they failed so that based on that i can only do retry for remaining docs to bulkUpsert.

Please help me . Is it even possible asynchronusly Upsert in couchbase?

Of course it is. You need to understand how RxJava works so you can create a solution that works for you.

Start here:

You asked a similar question elsewhere.