possible NPE in StorageProxy?
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                 Key: CASSANDRA-631
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-631
             Project: Cassandra
          Issue Type: Bug
    Affects Versions: 0.5
         Environment: all
            Reporter: gabriele renzi


insert() in StorageProxy contains a logging statement that refers to a possibly 
un-initialized variable
{{{
logger.debug("insert writing key " + rm.key() + " to " + 
unhintedMessage.getMessageId() + "@" + hintedTarget + " for " + target);
}}}

this could happen if getHintedEndpointMap(rm.key(), naturalEndpoints) returns 
only elements for which target.equals(hintedTarget) returns false, which seems 
possible to me. 

Looking at the code I get the feeling the reference should probably be to 
'hintedMessage', instead of "unhintedMessage", if not so an 
assert statement could be appropriate

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