In cases an index is re-indexed, but indexing is stopped in between, the index copier mbean shows the partially created new index stats even though old indexes are still in use.
1. Reindex by setting reindex= true
2. stop reindexing using from jmx console (indexstats) as follows:
- click on index's "index stats" whose reindexing is triggered.
- call abortAndPause operation.