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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5659) C++ Client (master) behavior is unstable resulting incorrect result or exception in API calls
Date Thu, 13 Jul 2017 15:05:00 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16085828#comment-16085828

ASF GitHub Bot commented on DRILL-5659:

GitHub user parthchandra opened a pull request:


    DRILL-5659: Fix error code checking in reading from socket

    Check if errorcode is set before checking if the error code is EINTR. Also, check for
error first thing after making the read_some or write_some calls.
    This fixes the case when we read (or write) only a part of the data in a call to read
from or write to the socket.
    Tested for the issue on Mac/Centos. Not tested on Windows. Not tested for the case with
SASL encryption.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/parthchandra/drill DRILL-5659

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #876
commit 0a29ced81dc935b926e734ea169eb884a2cbe40f
Author: Parth Chandra <parthc@apache.org>
Date:   2017-07-12T21:39:17Z

    DRILL-5659: Fix error code checking in reading from socket


> C++ Client (master) behavior is unstable resulting incorrect result or exception in API
> ---------------------------------------------------------------------------------------------
>                 Key: DRILL-5659
>                 URL: https://issues.apache.org/jira/browse/DRILL-5659
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Rob Wu
>             Fix For: 1.11.0
>         Attachments: 1-10cppClient-1.10.0Drillbit-hive.log, 1-10cppClient-1.10.0Drillbit-metadata
and catalog test.log, 1-10cppClient-1.9.0Drillbit-dfs.log, 1-10cppClient-1.9.0Drillbit-hive.log,
1-10cppClient-1.9.0Drillbit-metadata and catalog test.log, 1-11cppClient-1.10.0Drillbit-hive.log,
1-11cppClient-1.10.0Drillbit-metadata and catalog test.log, 1-11cppClient-1.9.0Drillbit-dfs.log,
1-11cppClient-1.9.0Drillbit-hive.log, 1-11cppClient-1.9.0Drillbit-metadata and catalog test.log
> I recently compiled the C++ client (on windows) from master and tested against a 1.9.0
drillbit. The client's behavior does not meet the stable release requirement.
> Some API functionalities are broken and should be investigated.
> Most noticeable is the getColumns(...) call. It will throw an exception with "Cannot
decode getcolumns results" when the number of rows (column records) exceeds a certain number.

> I also noticed that: during query execution + data retrieval, if the table is large enough,
the result coming back will start to become NULL or empty.
> I will see if I can generate some drillclient logs to put in the attachment.
> I will also compile and test on other platforms.

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