java - Generate Lucene segments_N file -


while moving lucene index files server other, forgot move segments_n file (because use pattern *.*)

unfortunately i've erased original folder, , have these files in directory :

_1rpt.fdt _1rpt.fdx _1rpt.fnm _1rpt.nvd _1rpt.nvm _1rpt.si _1rpt_lucene50_0.doc _1rpt_lucene50_0.dvd _1rpt_lucene50_0.dvm _1rpt_lucene50_0.pos _1rpt_lucene50_0.tim _1rpt_lucene50_0.tip write.lock

i missing segments_42u file, , without cannot org.apache.lucene.index.checkindex :

exception in thread "main" org.apache.lucene.index.indexnotfoundexception: no segments* file found in mmapdirectory@/solr-5.3.1/nodes/node1/core/data/index lockfactory=org.apache.lucene.store.nativefslockfactory@119d7047: files: [write.lock, _1rpt.fdt, _1rpt.fdx, _1rpt.fnm, _1rpt.nvd, _1rpt.nvm, _1rpt.si, _1rpt_lucene50_0.doc, _1rpt_lucene50_0.dvd, _1rpt_lucene50_0.dvm, _1rpt_lucene50_0.pos, _1rpt_lucene50_0.tim, _1rpt_lucene50_0.tip] @ org.apache.lucene.index.checkindex.checkindex(checkindex.java:483) @ org.apache.lucene.index.checkindex.domain(checkindex.java:2354) @ org.apache.lucene.index.checkindex.main(checkindex.java:2237)

the index pretty huge (> 800gb) , take weeks rebuild it.

is there way generate missing segment info file ?

thanks lot help.

as ameertawfik has suggested, ask question lucene mailing list, , me solving issue.

here solution, in case else (add lucene-core-x.x.x.jar classpath) :

package org.apache.lucene.index;  import java.io.ioexception; import java.nio.file.path; import java.nio.file.paths;  import org.apache.lucene.codecs.codec; import org.apache.lucene.store.directory; import org.apache.lucene.store.iocontext; import org.apache.lucene.store.simplefsdirectory;  public class gensegmentinfo {     public static void main(string[] args) throws ioexception {         codec codec = codec.getdefault();         path mypath = paths.get("/tmp/index");         directory directory = new simplefsdirectory(mypath);          //launch first time random segmentid value         //then java debug, right segment id         //by putting breakpoint on codecutil#checkindexheaderid(...)         byte[] segmentid = {88, 55, 58, 78, -21, -55, 102, 99, 123, 34, 85, -38, -70, -120, 102, -67};          segmentinfo info = codec.segmentinfoformat().read(directory, "_1rpt",                 segmentid, iocontext.read);         info.setcodec(codec);         segmentinfos infos = new segmentinfos();         segmentcommitinfo commit = new segmentcommitinfo(info, 1, -1, -1, -1);         infos.add(commit);         infos.commit(directory);     } }

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