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https://issues.apache.org/jira/browse/DRILL-4006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14987627#comment-14987627
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ASF GitHub Bot commented on DRILL-4006:
---------------------------------------
GitHub user hsuanyi opened a pull request:
https://github.com/apache/drill/pull/233
DRILL-4006: Ensure the position of MapWriters is set
This can help eliminate potential IOOB exception
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hsuanyi/incubator-drill DRILL-4006
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/233.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #233
----
commit 4c0048090f56c6e017ffbad20170af46cbf53b41
Author: Hsuan-Yi Chu <[email protected]>
Date: 2015-11-01T00:14:34Z
DRILL-4006: Ensure the position of MapWriters is set
This can help eliminate potential IOOB exception
----
> As json reader reads a field with empty lists, IOOB could happen
> ----------------------------------------------------------------
>
> Key: DRILL-4006
> URL: https://issues.apache.org/jira/browse/DRILL-4006
> Project: Apache Drill
> Issue Type: Bug
> Components: Storage - JSON
> Reporter: Sean Hsuan-Yi Chu
> Assignee: Sean Hsuan-Yi Chu
> Attachments: a.json, b.json, c.json
>
>
> If a field in a json file has many empty lists before a non-empty list, there
> could be an IOOB exception.
> Running the following query on the folder with files in the attachment can
> reproduce the observation:
> {code}
> select a from`folder`
> {code}
> Exception:
> org.apache.drill.common.exceptions.UserRemoteException: DATA_READ ERROR:
> index: 4448, length: 4
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