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From "Jane Deng (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-11587) Cfstats estimate number of keys should return 0 for empty table
Date Sat, 16 Apr 2016 00:20:25 GMT
Jane Deng created CASSANDRA-11587:
-------------------------------------

             Summary: Cfstats estimate number of keys should return 0 for empty table
                 Key: CASSANDRA-11587
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11587
             Project: Cassandra
          Issue Type: Bug
          Components: Tools
         Environment: Cassandra 2.1.13
Nodeltool
            Reporter: Jane Deng
            Priority: Trivial


If sstable count is 0, the "estimate number of keys" in cfstats shows -1. 

{noformat}
SSTable count: 0
Number of keys (estimate): -1
{noformat}

The initial value of keyCount in SSTableReader is -1. When there is no sstable, nor entry
in memtable, the keyCount isn't increased. Cfstats should have some boundary check and return
0 for this case. 





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