Problem

Detail Error Message
java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BOOLEAN at line 1 column 285 path $.comments[0]

Cause

 The script in the Sync Rules, which puts booleans into comments array.

replica.comments = [ true ]

Solution

  1. Clean up the sync 
  2. Remove following line of code form the Sync Rules

    replica.comments = [ true ]

  3. Retry the sync again using Exalate issue operation.