Github user sudheeshkatkam commented on a diff in the pull request: https://github.com/apache/drill/pull/838#discussion_r117576158 --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/ScanBatch.java --- @@ -173,9 +174,8 @@ public IterOutcome next() { currentReader.allocate(mutator.fieldVectorMap()); } catch (OutOfMemoryException e) { - logger.debug("Caught Out of Memory Exception", e); clearFieldVectorMap(); - return IterOutcome.OUT_OF_MEMORY; + throw UserException.memoryError(e).build(logger); --- End diff -- Makes sense. Asking the question a different way.. To avoid regressions, should the pre-requisite changes ([DRILL-5211](https://issues.apache.org/jira/browse/DRILL-5211) and pertinent tasks) be committed before this patch? Or since _the readers do not correctly handle the case_ anyway, there will be no difference?
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