On Mon, Nov 28, 2011 at 10:49 AM, Roberto Iannone <iann...@crmpa.unisa.it> wrote: > Hi Michael, > > thx for your help :)
You're welcome! > 2011/11/28 Michael McCandless <luc...@mikemccandless.com> > >> Which version of Solr/Lucene were you using when you hit power loss? >> > I'm using Lucene 3.4. Hmm, which OS/filesystem? Unexpected power loss (nor OS crash, JVM crash) in 3.4.0 should not cause corrumption, as long as the IO system properly implements fsync. >> There was a known bug that could allow power loss to cause corruption, >> but this was fixed in Lucene 3.4.0. >> >> Unfortunately, there is no easy way to recreate the segments_N file... >> in principle it should be possible and maybe not too much work but >> nobody has created such a tool yet, that I know of. > > some hints about how could I write this code by myself ? Well, you'd need to take a listing of all files, aggregate those into unique segment names, open a SegmentReader on each segment name, and from that SegmentReader reconstruct what you can (numDocs, delCount, isCompoundFile, etc.) about each SegmentInfo. Add all the resulting SegmentInfo instances into a new SegmentInfos and write it to the directory. Was the index newly created in 3.4.x? If not (if you inherited segments from earlier Lucene versions) you might also have to reconstruct shared doc stores (stored fields, term vectors) files, which will be trickier... Mike
