question Re: What happens when a hive partition is queried at a same time when a compaction(major/minor) is in progress in HDP 2.5? Would the query fail? in Support Questions https://community.cloudera.com/t5/Support-Questions/What-happens-when-a-hive-partition-is-queried-at-a-same-time/m-p/123516#M86260 <P>Nope - compaction retains old files until all readers are out. </P><P>The implementation has ACID isolation levels - you could start a query and then do "delete from table" &amp; still get no errors on the query which is already in motion.</P> Wed, 11 Jan 2017 06:39:27 GMT gopalv 2017-01-11T06:39:27Z What happens when a hive partition is queried at a same time when a compaction(major/minor) is in progress in HDP 2.5? Would the query fail? https://community.cloudera.com/t5/Support-Questions/What-happens-when-a-hive-partition-is-queried-at-a-same-time/m-p/123515#M86259 Wed, 11 Jan 2017 06:37:26 GMT https://community.cloudera.com/t5/Support-Questions/What-happens-when-a-hive-partition-is-queried-at-a-same-time/m-p/123515#M86259 kkanchu 2017-01-11T06:37:26Z Re: What happens when a hive partition is queried at a same time when a compaction(major/minor) is in progress in HDP 2.5? Would the query fail? https://community.cloudera.com/t5/Support-Questions/What-happens-when-a-hive-partition-is-queried-at-a-same-time/m-p/123516#M86260 <P>Nope - compaction retains old files until all readers are out. </P><P>The implementation has ACID isolation levels - you could start a query and then do "delete from table" &amp; still get no errors on the query which is already in motion.</P> Wed, 11 Jan 2017 06:39:27 GMT https://community.cloudera.com/t5/Support-Questions/What-happens-when-a-hive-partition-is-queried-at-a-same-time/m-p/123516#M86260 gopalv 2017-01-11T06:39:27Z