Xiao Meng created DRILL-899:
-------------------------------

             Summary: C++ Client. VS 2010 will populate a debug error for 
comparing two iterators in empty map
                 Key: DRILL-899
                 URL: https://issues.apache.org/jira/browse/DRILL-899
             Project: Apache Drill
          Issue Type: Bug
          Components: Client - C++
            Reporter: Xiao Meng
            Assignee: Xiao Meng
            Priority: Minor


If m_queryIds is empty (e.g., when we terminate a hanging query), the following 
code will populate will throw a debug error ("map/set iterators incompatible") 
for comparing iterator for empty map.

{code}
for(iter = m_queryIds.begin() ; iter != m_queryIds.end(); iter++) {
    iter->second->signalError(pErr);
}
{code}




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