Hi all, We recently switched to Lucene 6.5 from 2.9 and we have an issue that the files in index directory are not getting released after the IndexWriter finishes up writing a batch of documents. We are using IndexFolder.listFiles().length to check the number of files in index folder. We have even tried closing/reopening the IndexWriter/SearcherManager/MMapDirectory after indexing each batch to see if that would release the files but it didn't. When we shutdown the tomcat and restart it, only then we see that number drop, which proves that there were some deleted files still held by Lucene somewhere. Can you please direct me on what needs to be checked?
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