Jack Krupansky created LUCENE-4104:
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             Summary: Clearly document the limit for maximum number of 
documents in a single index
                 Key: LUCENE-4104
                 URL: https://issues.apache.org/jira/browse/LUCENE-4104
             Project: Lucene - Java
          Issue Type: Improvement
          Components: core/index
    Affects Versions: 3.6
            Reporter: Jack Krupansky
            Priority: Minor


Although the "int" in a number of APIs strongly suggests the approximate limit 
to the number of documents than can exist in a single Lucene index, it would be 
useful to have the specific number more clearly documented.

My reading suggests that the limit is 2^31-2 so that the count of documents, 0 
to 2^31-2, will fit in an int as Integer.MAX_INT or 2^31-1 or 2,147,483,647.

Symbolic definitions of the maximum document number and maximum number of 
documents, as well as the first document number should also be provided.

A subsequent issue will be to detect and throw an exception when that limit is 
exceeded.


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