[LUCENE-1179] AssertionError on creating doc containing field with empty string as field name

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.3
• Fix Version/s: 2.3.1, 2.4
• Component/s: core/index
• Lucene Fields: New
• Assignee: Michael McCandless
• Reporter: Michael McCandless
• Created: 15/Feb/08 14:50
• Updated: 28/Aug/22 11:46
• Resolved: 15/Feb/08 15:18

Description

Spinoff from here:

http://www.gossamer-threads.com/lists/lucene/java-user/58496

Pre-2.3 you were allowed to add Fields to a Document where the field name is the empty string. In 2.3.0 it broke: you hit this during flush:

java.lang.AssertionError
    at org.apache.lucene.index.TermInfosWriter.add(TermInfosWriter.java:143)
    at org.apache.lucene.index.DocumentsWriter.appendPostings(DocumentsWriter.java:2290)
    at org.apache.lucene.index.DocumentsWriter.writeSegment(DocumentsWriter.java:1985)
    at org.apache.lucene.index.DocumentsWriter.flush(DocumentsWriter.java:539)
    at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:2497)
    at org.apache.lucene.index.IndexWriter.flush(IndexWriter.java:2397)
    at org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:1204)
    at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1178)
    at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1153) 

The bug is just an over-aggressive assert statement. I'll commit a fix shortly & port to 2.3 branch for 2.3.1 release.