Closing IndexWRiter object after each file being indexed causes NullPointerexception?

[jitender ahuja]

Hi,      Can anyone tell what is the cause of error for the following error as the source of error is not any of the following: a) Index directory closing after each file of the directory (to be indexed) : verified by the changing directory size, with the changing  number of files to be indexed b) IndexWriter object being closed out : verified by checking the IndexWriter object ( here, writ) being a non-null object, by the line:         System.out.println(writ != null); in the attached code     Error output:  java.lang.NullPointerException         at org.apache.lucene.index.IndexWriter.close(Unknown Source)         at IndexDatanew.indexDocs(IndexDatanew.java:89)         at IndexDatanew.indexDocs(IndexDatanew.java:50)         at IndexDatanew.main(IndexDatanew.java:25)   The code that causes this error is working fine otherwise (i.e. for indexing purposes) and is "attached"; the output in detail for a directory of 2 files is also attached.:   Thanks Jitender

C:\lucroche>java IndexDatanew E:\freebooks\books\whole\jiten
Index Directory: E:\freebooks\books\whole\jiten
2
E:\freebooks\books\whole\jiten\Copy of TIJ3_c.htm
adding: E:\freebooks\books\whole\jiten\Copy of TIJ3_c.htm
File contents from buffer:
E:\freebooks\books\whole\jiten\Copy of TIJ3_c.htm
false
E:\freebooks\books\whole\jiten\TIJ3_c.htm
adding: E:\freebooks\books\whole\jiten\TIJ3_c.htm
File contents from buffer:
E:\freebooks\books\whole\jiten\TIJ3_c.htm
false
java.lang.NullPointerException
        at org.apache.lucene.index.IndexWriter.close(Unknown Source)
        at IndexDatanew.indexDocs(IndexDatanew.java:89)
        at IndexDatanew.indexDocs(IndexDatanew.java:50)
        at IndexDatanew.main(IndexDatanew.java:25)
     

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