Please help. With this java exception.
Can someone guide me as of how to fix the below exception.
i need it badly, Please help
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Exception in thread "Thread-9" java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.ArrayList.get(Unknown Source)
at org.apache.lucene.index.FieldInfos.fieldInfo(FieldInfos.java:155)
at org.apache.lucene.index.FieldInfos.fieldName(FieldInfos.java:151)
at org.apache.lucene.index.SegmentTermEnum.readTerm(SegmentTermEnum.java:149)
at org.apache.lucene.index.SegmentTermEnum.next(SegmentTermEnum.java:115)
at org.apache.lucene.index.TermInfosReader.readIndex(TermInfosReader.java:86)
at org.apache.lucene.index.TermInfosReader.<init>(TermInfosReader.java:45)
at org.apache.lucene.index.SegmentReader.initialize(SegmentReader.java:112)
at org.apache.lucene.index.SegmentReader.<init>(SegmentReader.java:89)
at org.apache.lucene.index.IndexReader$1.doBody(IndexReader.java:118)
at org.apache.lucene.store.Lock$With.run(Lock.java:109)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:111)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:106)
at com.mathworks.mlwidgets.help.search.lucene.LuceneSearchEngine$LuceneRefreshThread.loadIndexes(LuceneSearchEngine.java:176)
at com.mathworks.mlwidgets.help.search.lucene.LuceneSearchEngine$LuceneRefreshThread.doRefresh(LuceneSearchEngine.java:145)
at com.mathworks.mlwidgets.help.search.SearchEngine$RefreshThread.run(SearchEngine.java:323)
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