do you mean `http://www.getopt.org/luke/`?
On Mon, Sep 26, 2016 at 4:58 AM, Michael McCandless < luc...@mikemccandless.com> wrote: > It is in theory possible to reconstruct a segments file by ls-ing all > other index files and manually rebuilding it but it is not an easy > task and it would have to make some guesses. > > I think in the past a user did manage to create such a tool and maybe > posted the results here either on this list or the dev list? > > The segments file is a vital file to the index. It holds all metadata > about the index segments. This is why Lucene is so careful about > writing a new one to a "pending" file, fsync'ing that, fsyncing the > directory, and doing an atomic rename, all before removing the older > segment files. > > Mike McCandless > > http://blog.mikemccandless.com > > > On Sun, Sep 25, 2016 at 10:37 AM, Ziming Dong <dzm1016397...@gmail.com> > wrote: > > sorry to resend. > > I'll change IO to local. Is there anyway to recover first index? now it > can > > not be opened by checkIndex, we are building index of 7 billion > webpages, it > > costs much time to rebuild. > > > > On Sun, Sep 25, 2016 at 5:31 PM, Ziming Dong <dzm1016397...@gmail.com> > > wrote: > >> > >> I'll change IO to local. Is there anyway to recover first index? now it > >> can be opened by checkIndex, we are building index of 7 billion > webpages, it > >> costs much time to rebuild. > >> > >> On Sat, Sep 24, 2016 at 2:54 AM, Michael McCandless > >> <luc...@mikemccandless.com> wrote: > >>> > >>> The 'sync' option for an NFS client just means that every write is > >>> sent immediately across the network. And it really is useless > >>> performance loss as long as your app (like Lucene) does the "right > >>> thing" with fsync. > >>> > >>> The more important question is why fsync sent to your NFS client and > >>> then to the Mac Mini's NFS server failed to actually move all written > >>> bytes to durable storage. > >>> > >>> Can you reproduce this issue if you use a more well trodden IO system, > >>> e.g. Linux with ext4 on a local IO device? > >>> > >>> Mike McCandless > >>> > >>> http://blog.mikemccandless.com > >>> > >>> On Fri, Sep 23, 2016 at 12:00 AM, Ziming Dong <dzm1016397...@gmail.com > > > >>> wrote: > >>> > I use the macmini on NFS server side. It seems mount option sync is > >>> > useless, just slows down the index program. > >>> > > >>> > On Fri, Sep 23, 2016 at 4:43 AM, Michael McCandless > >>> > <luc...@mikemccandless.com> wrote: > >>> >> > >>> >> OK sorry I meant your first index, and it seems to have only one > >>> >> (broken) segments file. Can you post the "ls -l" output of that > first > >>> >> index? It looks like the file was (illegally) filled with 0s, or at > >>> >> least the first 4 bytes were. > >>> >> > >>> >> Lucene writes this file, fsyncs it, does an atomic rename, and > fsyncs > >>> >> the directory, so this should not happen, if your IO system honors > >>> >> fsync. > >>> >> > >>> >> What IO devices are used by the NFS server? > >>> >> > >>> >> NFS is not well tested and has several known problems with Lucene so > >>> >> this is already risky ground... > >>> >> > >>> >> Mike McCandless > >>> >> > >>> >> http://blog.mikemccandless.com > >>> >> > >>> >> On Thu, Sep 22, 2016 at 11:33 AM, Ziming Dong > >>> >> <dzm1016397...@gmail.com> > >>> >> wrote: > >>> >> > second index is recovered by checkIndex, I don't know what are in > >>> >> > second > >>> >> > index directory before recover. > >>> >> > checkIndex can't read first index. index filenames are attached. > >>> >> > I use lucene6.0.0 at the beginning, then I upgrade to lucene6.1.0 > to > >>> >> > continue index. > >>> >> > > >>> >> > On Thu, Sep 22, 2016 at 10:17 PM, Michael McCandless > >>> >> > <luc...@mikemccandless.com> wrote: > >>> >> >> > >>> >> >> Do you have 2 separate segments files in that 2nd index? > >>> >> >> > >>> >> >> Which exact Lucene version is this? > >>> >> >> > >>> >> >> Mike McCandless > >>> >> >> > >>> >> >> http://blog.mikemccandless.com > >>> >> >> > >>> >> >> > >>> >> >> On Thu, Sep 22, 2016 at 7:44 AM, Ziming Dong > >>> >> >> <dzm1016397...@gmail.com> > >>> >> >> wrote: > >>> >> >> > I used checkIndex to recover second index though I lost many > docs > >>> >> >> > in > >>> >> >> > index, > >>> >> >> > but first index can't be read by checkIndex, error is > >>> >> >> > > >>> >> >> >> java -cp lucene-core-6.1.0.jar -ea:org.apache.lucene... > >>> >> >> >> org.apache.lucene.index.CheckIndex > >>> >> >> >> /Volumes/HPT8_56T/infomall-index/index0 > >>> >> >> >> Opening index @ /Volumes/HPT8_56T/infomall-index/index0 > >>> >> >> >> ERROR: could not read any segments file in directory > >>> >> >> >> org.apache.lucene.index.IndexFormatTooOldException: Format > >>> >> >> >> version > >>> >> >> >> is > >>> >> >> >> not > >>> >> >> >> supported (resource > >>> >> >> >> > >>> >> >> >> > >>> >> >> >> > >>> >> >> >> BufferedChecksumIndexInput(MMapIndexInput(path="/Volumes/ > HPT8_56T/infomall-index/index0/segments_5t3"))): > >>> >> >> >> 0 (needs to be between 1071082519 and 1071082519). This > version > >>> >> >> >> of > >>> >> >> >> Lucene > >>> >> >> >> only supports indexes created with release 5.0 and later. > >>> >> >> >> at > >>> >> >> >> > >>> >> >> >> > >>> >> >> >> org.apache.lucene.index.SegmentInfos.readCommit( > SegmentInfos.java:295) > >>> >> >> >> at > >>> >> >> >> > >>> >> >> >> > >>> >> >> >> org.apache.lucene.index.SegmentInfos.readCommit( > SegmentInfos.java:284) > >>> >> >> >> at > >>> >> >> >> > >>> >> >> >> org.apache.lucene.index.CheckIndex.checkIndex( > CheckIndex.java:507) > >>> >> >> >> at > >>> >> >> >> org.apache.lucene.index.CheckIndex.doCheck(CheckIndex. > java:2595) > >>> >> >> >> at > >>> >> >> >> org.apache.lucene.index.CheckIndex.doMain(CheckIndex. > java:2497) > >>> >> >> >> at > >>> >> >> >> org.apache.lucene.index.CheckIndex.main(CheckIndex.java:2423) > >>> >> >> > > >>> >> >> > > >>> >> >> > I use NFS, but I set mount option as mount -t nfs -o > >>> >> >> > tcp,sync,retrans=10 > >>> >> >> > The index program has run 1 month without any problem before > >>> >> >> > power > >>> >> >> > failure. > >>> >> >> > > >>> >> >> > On Thu, Sep 22, 2016 at 6:06 PM, Michael McCandless > >>> >> >> > <luc...@mikemccandless.com> wrote: > >>> >> >> >> > >>> >> >> >> Hmm I'm no longer so sure this is an IW bug: on commit we > fsync > >>> >> >> >> the > >>> >> >> >> pending_segments_N and then do an atomic rename to segments_N. > >>> >> >> >> > >>> >> >> >> Can you describe your IO system? Is it possible it does not > >>> >> >> >> implement > >>> >> >> >> fsync or atomic renames correctly? > >>> >> >> >> > >>> >> >> >> Also, your 2nd exception indices the segments_N file was > intact > >>> >> >> >> but > >>> >> >> >> the .cfs file was corrupt, which is also hard to explain > unless > >>> >> >> >> fsync > >>> >> >> >> isn't working on your IO system. > >>> >> >> >> > >>> >> >> >> Mike McCandless > >>> >> >> >> > >>> >> >> >> http://blog.mikemccandless.com > >>> >> >> >> > >>> >> >> >> On Thu, Sep 22, 2016 at 5:10 AM, Michael McCandless > >>> >> >> >> <luc...@mikemccandless.com> wrote: > >>> >> >> >> > Sorry for the slow reply here. Curious that both of these > >>> >> >> >> > exceptions > >>> >> >> >> > are from IW.init. I think this may be a real bug, caused by > >>> >> >> >> > this: > >>> >> >> >> > > >>> >> >> >> > > >>> >> >> >> > > >>> >> >> >> > > >>> >> >> >> > https://github.com/apache/lucene-solr/commit/ > 981bfba841144d08df1d1a183d39fcd6f195ad56 > >>> >> >> >> > > >>> >> >> >> > I'll see if I can make a standalone test case showing this. > >>> >> >> >> > > >>> >> >> >> > If you open those indices with an IndexReader instead, does > it > >>> >> >> >> > succeed? > >>> >> >> >> > > >>> >> >> >> > If you run CheckIndex, what does it report? > >>> >> >> >> > > >>> >> >> >> > Mike McCandless > >>> >> >> >> > > >>> >> >> >> > http://blog.mikemccandless.com > >>> >> >> >> > > >>> >> >> >> > On Wed, Sep 14, 2016 at 1:22 AM, Ziming Dong > >>> >> >> >> > <dzm1016397...@gmail.com> > >>> >> >> >> > wrote: > >>> >> >> >> >> I have 6 machine and 6 index directories, each machine > builds > >>> >> >> >> >> index > >>> >> >> >> >> into > >>> >> >> >> >> one index directory. After power failure last night, two of > >>> >> >> >> >> those > >>> >> >> >> >> machine > >>> >> >> >> >> can't start index program. > >>> >> >> >> >> > >>> >> >> >> >> one error is > >>> >> >> >> >> > >>> >> >> >> >>> INFO: 2016-09-14 12:31:38 [main] > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.InfomallIndexer$Builder: > ignoreCollectionsFile(227): > >>> >> >> >> >>> Loaded 2146 ignored collections from > >>> >> >> >> >>> /mnt/HPT8_56T/infomall-index/ > index0/ignored_collections.txt > >>> >> >> >> >>> ERROR: 2016-09-14 12:31:39 [main] > >>> >> >> >> >>> sewm.bdbox.util.LogUtil:error(71): > >>> >> >> >> >>> org.apache.lucene.index.IndexFormatTooOldException: > Format > >>> >> >> >> >>> version > >>> >> >> >> >>> is > >>> >> >> >> >>> not > >>> >> >> >> >>> supported (resource > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> BufferedChecksumIndexInput(MMapIndexInput(path="/mnt/ > HPT8_56T/infomall-index/index0/segments_5t3"))): > >>> >> >> >> >>> 0 (needs to be between 1071082519 and 1071082519). This > >>> >> >> >> >>> version > >>> >> >> >> >>> of > >>> >> >> >> >>> Lucene > >>> >> >> >> >>> only supports indexes created with release 5.0 and later. > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.index.SegmentInfos.readCommit( > SegmentInfos.java:295) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.index.SegmentInfos.readCommit( > SegmentInfos.java:284) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.index.IndexWriter.<init>( > IndexWriter.java:910) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.InfomallIndexer.<init>( > InfomallIndexer.java:60) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.ThreadedInfomallIndexer.<init> > (ThreadedInfomallIndexer.java:28) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.ThreadedInfomallIndexer.<init> > (ThreadedInfomallIndexer.java:21) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.ThreadedInfomallIndexer$Builder.build( > ThreadedInfomallIndexer.java:72) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.ThreadedInfomallIndexer.main( > ThreadedInfomallIndexer.java:129) > >>> >> >> >> >> > >>> >> >> >> >> > >>> >> >> >> >> another is > >>> >> >> >> >> > >>> >> >> >> >> INFO: 2016-09-14 01:11:06 [main] > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.InfomallIndexer$Builder: > ignoreCollectionsFile(227): > >>> >> >> >> >>> Loaded 8575 ignored collections from > >>> >> >> >> >>> /mnt/HPT8/infomall-index/index5/ignored_collections.txt > >>> >> >> >> >>> ERROR: 2016-09-14 01:11:09 [main] > >>> >> >> >> >>> sewm.bdbox.util.LogUtil:error(71): > >>> >> >> >> >>> org.apache.lucene.index.CorruptIndexException: codec > footer > >>> >> >> >> >>> mismatch > >>> >> >> >> >>> (file > >>> >> >> >> >>> truncated?): actual footer=0 vs expected > footer=-1071082520 > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> (resource=MMapIndexInput(path="/mnt/HPT8/infomall-index/ > index5/_1kqn.cfs")) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.codecs.CodecUtil.validateFooter( > CodecUtil.java:448) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.codecs.CodecUtil.retrieveChecksum( > CodecUtil.java:433) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.codecs.lucene50. > Lucene50CompoundReader.<init>(Lucene50CompoundReader.java:86) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.codecs.lucene50.Lucene50CompoundFormat. > getCompoundReader(Lucene50CompoundFormat.java:71) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.index.IndexWriter.readFieldInfos( > IndexWriter.java:1016) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.index.IndexWriter.getFieldNumberMap( > IndexWriter.java:1033) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> org.apache.lucene.index.IndexWriter.<init>( > IndexWriter.java:938) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.InfomallIndexer.<init>( > InfomallIndexer.java:60) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.ThreadedInfomallIndexer.<init> > (ThreadedInfomallIndexer.java:28) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.ThreadedInfomallIndexer.<init> > (ThreadedInfomallIndexer.java:21) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.ThreadedInfomallIndexer$Builder.build( > ThreadedInfomallIndexer.java:72) > >>> >> >> >> >>> at > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> > >>> >> >> >> >>> sewm.bdbox.search.ThreadedInfomallIndexer.main( > ThreadedInfomallIndexer.java:129) > >>> >> >> >> >>> > >>> >> >> >> >> > >>> >> >> >> >> > >>> >> >> >> >> it seems 1071082519 is a special number. > >>> >> >> >> >> > >>> >> >> >> >> - - > >>> >> >> >> >> > >>> >> >> >> >> Ziming Dong > >>> >> >> >> >> *http://suiyuan2009.github.io/ > >>> >> >> >> >> <http://suiyuan2009.github.io/>* > >>> >> >> > > >>> >> >> > > >>> >> >> > > >>> >> >> > > >>> >> >> > -- > >>> >> >> > > >>> >> >> > Ziming Dong > >>> >> >> > http://suiyuan2009.github.io/ > >>> >> >> > > >>> >> > > >>> >> > > >>> >> > > >>> >> > > >>> >> > -- > >>> >> > > >>> >> > Ziming Dong > >>> >> > http://suiyuan2009.github.io/ > >>> >> > > >>> > > >>> > > >>> > > >>> > > >>> > -- > >>> > > >>> > Ziming Dong > >>> > http://suiyuan2009.github.io/ > >>> > > >> > >> > >> > >> > >> -- > >> > >> Ziming Dong > >> http://suiyuan2009.github.io/ > >> > > > > > > > > -- > > > > Ziming Dong > > http://suiyuan2009.github.io/ > > > -- Ziming Dong *http://suiyuan2009.github.io/ <http://suiyuan2009.github.io/>*
