Usage: java org.apache.lucene.index.CheckIndex pathToIndex [-fix]
-fix: actually write a new segments_N file, removing any problematic segments
WARNING: -fix should only be used on an emergency basis as it will cause
documents (perhaps many) to be permanently removed from the index. Always make
a backup copy of your index before running this! Do not run this tool on an index
that is actively being written to. You have been warned!
Run without -fix, this tool will open the index, report version information
and report any exceptions it hits and what action it would take if -fix were
specified. With -fix, this tool will remove any segments that have issues and
write a new segments_N file. This means all documents contained in the affected
segments will be removed.
This tool exits with exit code 1 if the index cannot be opened or has has any
corruption, else 0.