No ... I don't think Luke can recreate the segments file. I dug around and found the thread I was thinking of: http://markmail.org/thread/ayl5q6rgtngeuoyy
Just be careful! Make a backup copy of your index first! Mike McCandless http://blog.mikemccandless.com On Thu, Sep 29, 2016 at 11:31 AM, Ziming Dong <dzm1016397...@gmail.com> wrote: > 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/ > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
