exception is hit while optimizing index

[maureen tanuwidjaja]

Hi ,
  
  I would like to know about optimizing index...
  
  The exception is hit due to disk full while optimizing the index and 
hence,the index has not been closed yet.
  
  Is the unclosed index dangerous?Can i perform searching in such index 
correctly?Is the index built robust yet?
  
  thanks and regards,
  maureen
  
 
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