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java.lang.NullPointerException at java.io.File.<init>(Unknown Source) at org.apache.lucene.store.FSDirectory.getDirectory(FSDirectory.java:117) at org.apache.lucene.index.IndexWriter.<init>(IndexWriter.java:204) at org.wikimedia.lsearch.importer.SimpleIndexWriter.openIndex(SimpleIndexWriter.java:67) at org.wikimedia.lsearch.importer.SimpleIndexWriter.<init>(SimpleIndexWriter.java:49) at org.wikimedia.lsearch.importer.DumpImporter.<init>(DumpImporter.java:39) at org.wikimedia.lsearch.importer.Importer.main(Importer.java:128)