How to repair corrupted lucene index?

Question

My server was power loss and lucene index was corrupted. I runned IndexChecker but it fail:

java -cp /home/dthoai/programs/paesia/checker/lucene-core-3.5.0.jar -         


        

Answer 1

It looks like the main directory file, segments_N is corrupted. This probably means that the power loss happened while a commit was running.

If this is the case, this means that there is some chance that an older segments_N file is present in your directory, and that the referenced segments are still present and valid. If there is such a file, try to remove your corrupted segments_ls0l file and see:

• whether Lucene manages to open the index,
• what data you are missing.

Otherwise, there are some threads one Lucene user mailing-list talking about regenerating the segments_N file.

• http://www.gossamer-threads.com/lists/lucene/java-user/102493
• http://www.gossamer-threads.com/lists/lucene/java-user/39744

Make sure to backup your directory before performing any modification.