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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/09/29 13:26:00 UTC

[jira] [Work logged] (BEAM-12628) AvroCoder changed underlying String class for SpecificRecords

     [ https://issues.apache.org/jira/browse/BEAM-12628?focusedWorklogId=657219&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-657219 ]

ASF GitHub Bot logged work on BEAM-12628:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 29/Sep/21 13:25
            Start Date: 29/Sep/21 13:25
    Worklog Time Spent: 10m 
      Work Description: clairemcginty opened a new pull request #15616:
URL: https://github.com/apache/beam/pull/15616


   following up on discussion from https://issues.apache.org/jira/browse/BEAM-12628, this changes the default value of AvroCoder#useReflectApi to `true`. This means that by default, avro string fields will get decoded as `CharSequence`s backed by `java.lang.String`s not `org.apache.avro.util.Utf8`s. This matches Beam's behavior prior to version 2.30.
   
   cc @RyanSkraba , @udim 
   ------------------------
   
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   Examples testing status on various runners
   --------------------------------------------------------
   
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         <th>Lang</th>
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         <th>Spark</th>
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         <td>Go</td>
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         <td>---</td>
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         <td>---</td>
         <td>---</td>
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   Post-Commit SDK/Transform Integration Tests Status (on master branch)
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   Pre-Commit Tests Status (on master branch)
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         <th>Java</th>
         <th>Python</th>
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         <td>---</td>
         <td>---</td>
         <td>---</td>
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 657219)
    Time Spent: 3h 10m  (was: 3h)

> AvroCoder changed underlying String class for SpecificRecords
> -------------------------------------------------------------
>
>                 Key: BEAM-12628
>                 URL: https://issues.apache.org/jira/browse/BEAM-12628
>             Project: Beam
>          Issue Type: Bug
>          Components: io-java-avro
>    Affects Versions: 2.30.0, 2.33.0
>            Reporter: Ryan Skraba
>            Assignee: Claire McGinty
>            Priority: P1
>             Fix For: 2.34.0
>
>          Time Spent: 3h 10m
>  Remaining Estimate: 0h
>
> The AvroCoder changes for BEAM-2303 changes the reader/writer from the Avro {{ReflectDatum*}} classes to the {{SpecificDatum*}} classes.
> Because of the way Avro handles Strings, however, the underlying instances for String data are deserialised as {{org.apache.avro.util.Utf8}} instances instead of {{java.lang.String}}.
> This causes:
> 1. an unexpected behaviour change when migrating to Beam 2.30.0
> 2. potential serialization issues when using these String instances (Utf8 instances don't implement Serializable)
> 3. an inconsistent API between {{AvroCoder}} and {{AvroSink}}/{{AvroSource}} (the latter still use {{ReflectDatum*}})
> (Original report on the [mailing list|https://lists.apache.org/x/thread.html/r5d0b975926cc4761f025ecd8df58a31e3f99e522296cc47d82ed5943@%3Cdev.beam.apache.org%3E] and [PR|https://github.com/apache/beam/pull/14410#issuecomment-880838488])



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