I wasn't aware of this jar file ;-) Did you try adding it in the Makefile and seeing if that fixes the problem ?
Andi.. > On Jun 4, 2019, at 11:30, David Allouche <da...@allouche.net> wrote: > > Hello, > > I use pylucene, and I am upgrading from 6.5.0 to 7.7.1. > > Opening my old index using the new pylucene, I get > >> Traceback (most recent call last): >> ... >> File "/home/user/jobaffinity/lib/luceneindex.py", line 58, in >> create_lucene_index_maybe >> writer = IndexWriter(directory, config) >> lucene.JavaError: <super: <class 'JavaError'>, <JavaError object>> >> Java stacktrace: >> java.lang.IllegalArgumentException: Could not load codec 'Lucene62'. Did >> you forget to add lucene-backward-codecs.jar? >> at org.apache.lucene.index.SegmentInfos.readCodec(SegmentInfos.java:428) >> at org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:360) >> at org.apache.lucene.index.SegmentInfos.readCommit(SegmentInfos.java:291) >> at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:845) >> Caused by: java.lang.IllegalArgumentException: An SPI class of type >> org.apache.lucene.codecs.Codec with name 'Lucene62' does not exist. You >> need to add the corresponding JAR file supporting this SPI to your >> classpath. The current classpath supports the following names: [Lucene70] >> at org.apache.lucene.util.NamedSPILoader.lookup(NamedSPILoader.java:116) >> at org.apache.lucene.codecs.Codec.forName(Codec.java:116) >> at org.apache.lucene.index.SegmentInfos.readCodec(SegmentInfos.java:424) >> ... 3 more > > I am really not familiar with the Java side of things. With some help from > the web, I found out where to download the jars. > > I presume I need > http://central.maven.org/maven2/org/apache/lucene/lucene-backward-codecs/7.7.1/lucene-backward-codecs-7.7.1.jar > > But then, I am quite clueless about what to do. I tried dumping the jar right > next to lucene-core-7.7.1.jar, in my > $(VENV)/lib/python2.7/site-packages/lucene, but that does not seem to help. > > I have a large-ish index with about 22M entries, used in a public-facing > service, so I very much like to avoid rebuilding the index every time I > upgrade pylucene. > > I could reverse-engineer this script: > https://github.com/cominvent/solr-tools/blob/master/upgradeindex/upgradeindex.sh > > But that would require me to put the service down while running the migration. > > How can I package the lucene-backwards-codecs in pylucene? > >
