sachouche commented on issue #1361: DRILL-6579: Added sanity checks to the 
Parquet reader to avoid infini…
URL: https://github.com/apache/drill/pull/1361#issuecomment-402250181
 
 
   @Ben-Zvi 
   A Drill user (version 1.12) reported a Parquet issue which indicated two 
different problems
   a) The Parquet code was running within an infinite loop; we don't have any 
repro for this issue. Code inspection showed that if the number-of-rows to load 
is zero than this condition could arise. So fixed this possibility and added 
sanity checks 
   b) When an infinite loop arises, the user could not cancel the query; so I 
created another JIRA DRILL-6578 to detect thread interruption within the main 
processing loop to ensure query cancellation always succeeds 

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