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?
