@aryathis could be a lot of things. E.g. if you were running a "compute stats" query, you could be hitting the same issue as this person: http://community.cloudera.com/t5/Interactive-Short-cycle-SQL/Impalad-exit-when-execute-compute-stats-on-table-whose-schema-is/m-p/64505#M4145?eid=1&aid=1 . If possible, I'd suggest upgrading to the latest maintenance release in the 5.10.x series, because that will include fixes for known bugs like the one linked above.
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