cc @jeelan.poola Indexer looks like giving same document key twice for non array index.
I already gave cbindex. Run this in shell on the indexer node with cbdindex exist as part of couchbase installations.
replace login/password and values if needed
Example:
This command scan index for value “123456789012345” on first index key of ix20. It says key k01
cbindex -type scan -bucket default -low='["123456789012345"]' -high='["123456789012345"]' -incl 3 -index ix20 -auth Administrator:password
Scan index:
["123456789012345"] ... k01
Total number of entries: 1