我试图在GAE应用程序中使用lucene,但是,使用lucene 3.1.0,甚至使用RAMDirectory(我应该没有,我只有大约300个文档来索引),我提交或关闭索引时出错(见下文) .线索？
Caused by: java.lang.NullPointerException
at org.apache.lucene.store.IndexOutput.writeString(IndexOutput.java:103)
at org.apache.lucene.store.IndexOutput.writeStringStringMap(IndexOutput.java:221)
at org.apache.lucene.index.SegmentInfo.write(SegmentInfo.java:619)
at org.apache.lucene.index.SegmentInfos.write(SegmentInfos.java:381)
at org.apache.lucene.index.SegmentInfos.prepareCommit(SegmentInfos.java:851)
at org.apache.lucene.index.IndexWriter.startCommit(IndexWriter.java:4224)
at org.apache.lucene.index.IndexWriter.prepareCommit(IndexWriter.java:3161)
at org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:3232)
at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3214)
at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3198)
PS:它当然适用于我的机器