I am using one sld file in geoserver of village parcel display. It works fine, but the issue is that the annotation(parcelno) display duplicates/replicates when I zoom in. What can I do?
This is because you have used tiling. Each request for a tile is a completely new request as far as the server is concerned, so it tries to label each polygon that appears in the requested map.
To solve this problem you can investigate the use of meta-tiling or make your labels a separate layer that is no tiled.