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From Jason Altekruse <altekruseja...@gmail.com>
Subject Re: Hangout starting in 5 minutes
Date Tue, 05 Jan 2016 23:31:36 GMT
Notes: Drill hangout - 1/5/2016

Vicky, Andries, Hakim, Aman, Julien, Jason, Charles

Drill 1.5 release thread, number of outstanding issues to solve

Parquet dates

    - metadata migration may be needed for old files

    - check migration tool to make sure it doesn't update already known
versions to a newer one

    - can use some combination of a whitelist of known good writers as well
as checking the year

      on some of the values and that the flag to auto-correct bad dates is

Allocator bugs

    - CTAS with partitioning was failing, sort running out of memory

    - Flatten was having issues

        - Functional suite

        - intermittent

    - Unit test, jacques did not file a bug

        - sent an e-mail to parth and Hakim

    - advanced suite, out of memory failures

        - See if Dremio infrastructure is running advanced tests

        - checked with Jacques, Dremio is not currently running the
advanced suite

Amit's branch - testing by Vicky

    - blocked on the sort bug

        - his fix is on top of 1.5 which fails with out of memory in sort

          before it reaches the merge join operator

Aman hash skew - Drill-4237

    - sting of length 32 or more chars

        - bad skew due to use of signed rather than unsigned long in the C

        - revert to old hash functions

        - performance of the hash is a little slower, need to measure how

    - already tried using Guava UnsignedLong

        - does not have required operations for the xxhash algorithm

            - bit shifts


- warming from parquet library

    - parquet "corrupt statistics" message is showing with Drill 1.5

    - issue with partitioned files

        - partitioned by on date column seems to be the issue

On Tue, Jan 5, 2016 at 11:56 AM, Jason Altekruse <altekrusejason@gmail.com>

> Come join the Drill community in our weekly hangout meeting to find out
> what is going on with Drill right now.
> https://plus.google.com/hangouts/_/dremio.com/drillhangout
> Some items I would like to discuss this week:
> - 1.5 release, issues left to fix, when would we like to target for a vote
> - Drill parquet date bug: https://issues.apache.org/jira/browse/DRILL-4203
> Feel free to respond with other items you would like to have discussed, or
> just jump on the call.

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