Which version of Solr/Lucene were you using when you hit power loss? 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. Mike McCandless http://blog.mikemccandless.com On Mon, Nov 28, 2011 at 5:54 AM, Roberto Iannone <roberto.iann...@gmail.com> wrote: > Hi all, > > after a power supply inperruption my lucene index (about 28 GB) looks like > this: > > 18/11/2011 20:29 2.016.961.997 _3d.fdt > 18/11/2011 20:29 1.816.004 _3d.fdx > 18/11/2011 20:29 89 _3d.fnm > 18/11/2011 20:30 197.323.436 _3d.frq > 18/11/2011 20:30 1.816.004 _3d.nrm > 18/11/2011 20:30 358.016.461 _3d.prx > 18/11/2011 20:30 637.604 _3d.tii > 18/11/2011 20:30 48.565.519 _3d.tis > 18/11/2011 20:31 454.004 _3d.tvd > 18/11/2011 20:31 1.695.380.935 _3d.tvf > 18/11/2011 20:31 3.632.004 _3d.tvx > 18/11/2011 23:33 2.048.500.822 _6g.fdt > 18/11/2011 23:33 3.032.004 _6g.fdx > 18/11/2011 23:33 89 _6g.fnm > 18/11/2011 23:34 221.593.644 _6g.frq > 18/11/2011 23:34 3.032.004 _6g.nrm > 18/11/2011 23:34 350.136.996 _6g.prx > 18/11/2011 23:34 683.668 _6g.tii > 18/11/2011 23:34 52.224.328 _6g.tis > 18/11/2011 23:36 758.004 _6g.tvd > 18/11/2011 23:36 1.758.786.158 _6g.tvf > 18/11/2011 23:36 6.064.004 _6g.tvx > 19/11/2011 03:29 1.966.167.843 _9j.fdt > 19/11/2011 03:29 3.832.004 _9j.fdx > 19/11/2011 03:28 89 _9j.fnm > 19/11/2011 03:30 222.733.606 _9j.frq > 19/11/2011 03:30 3.832.004 _9j.nrm > 19/11/2011 03:30 324.722.843 _9j.prx > 19/11/2011 03:30 715.441 _9j.tii > 19/11/2011 03:30 54.488.546 _9j.tis > .... > > without any segment files! > I tried to fix with CheckIndex utility in lucene, but I got the following > message: > > ERROR: could not read any segments file in directory > org.apache.lucene.index.IndexNotFoundException: no segments* file found in > org.a > pache.lucene.store.MMapDirectory@E:\recover_me > lockFactory=org.apache.lucene.sto > re.NativeFSLockFactory@5d36d1d7: files: [_3d.fdt, _3d.fdx, _3d.fnm, > _3d.frq, _3d > .nrm, _3d.prx, _3d.tii, _3d.tis, _3d.tvd, _3d.tvf, _3d.tvx, _6g.fdt, > _6g.fdx, _6 > g.fnm, _6g.frq, _6g.nrm, _6g.prx, _6g.tii, _6g.tis, _6g.tvd, _6g.tvf, > _6g.tvx, _ > 9j.fdt, _9j.fdx, _9j.fnm, _9j.frq, _9j.nrm, _9j.prx, _9j.tii, _9j.tis, > _9j.tvd, > _9j.tvf, _9j.tvx, _cf.cfs, _cm.fdt, _cm.fdx, _cm.fnm, _cm.frq, _cm.nrm, > _cm.prx, > _cm.tii, _cm.tis, _cm.tvd, _cm.tvf, _cm.tvx, _ff.fdt, _ff.fdx, _ff.fnm, > _ff.frq > , _ff.nrm, _ff.prx, _ff.tii, _ff.tis, _ff.tvd, _ff.tvf, _ff.tvx, _ii.fdt, > _ii.fd > x, _ii.fnm, _ii.frq, _ii.nrm, _ii.prx, _ii.tii, _ii.tis, _ii.tvd, _ii.tvf, > _ii.t > vx, _lc.cfs, _ll.fdt, _ll.fdx, _ll.fnm, _ll.frq, _ll.nrm, _ll.prx, _ll.tii, > _ll. > tis, _ll.tvd, _ll.tvf, _ll.tvx, _lo.cfs, _lp.cfs, _lq.cfs, _lr.cfs, > _ls.cfs, _lt > .cfs, _lu.cfs, _lv.cfs, _lw.fdt, _lw.fdx, _lw.tvd, _lw.tvf, _lw.tvx, > _m.fdt, _m. > fdx, _m.fnm, _m.frq, _m.nrm, _m.prx, _m.tii, _m.tis, _m.tvd, _m.tvf, _m.tvx] > at > org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfo > s.java:712) > at > org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfo > s.java:593) > at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:359) > at > org.apache.lucene.index.CheckIndex.checkIndex(CheckIndex.java:327) > at org.apache.lucene.index.CheckIndex.main(CheckIndex.java:995) > > There's a way to recover this index ? > > Cheers > > Rob >
