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From "Rahul Challapalli (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5396) A flatten query on top of 2 files with one record each causes oversize allocation error randomly
Date Wed, 29 Mar 2017 23:14:41 GMT
Rahul Challapalli created DRILL-5396:
----------------------------------------

             Summary: A flatten query on top of 2 files with one record each causes oversize
allocation error randomly
                 Key: DRILL-5396
                 URL: https://issues.apache.org/jira/browse/DRILL-5396
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Data Types, Storage - JSON
            Reporter: Rahul Challapalli


As part of verifying DRILL-3562, I came up with the below 2 files

File 1:
{code}
{ "a": { "b": { "c": [] } } }
{code}

File 2:
{code}
{ "a": { "b": { "c": [1] } } }
{code}

Now the below query work on individual files, however when I run the query on a directory
containing both the files, I randomly hit the below error
{code}
select FLATTEN(t.a.b.c) AS c from dfs.`/drill/testdata/json_kvgenflatten/drill3562` t;
Error: SYSTEM ERROR: OversizedAllocationException: Unable to expand the buffer. Max allowed
buffer size is reached.

Fragment 0:0

[Error Id: e556243b-7ad6-4131-81f7-e8b225c9c8bc on qa-node182.qa.lab:31010] (state=,code=0)
{code}

This could be related to the fix for DRILL-3562



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