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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/10/28 20:34:00 UTC
[jira] [Work logged] (BEAM-13081) Portable representation of
"packed bitset indicating null fields" in beam Row format is not compatible
with jvm representations
[ https://issues.apache.org/jira/browse/BEAM-13081?focusedWorklogId=671633&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-671633 ]
ASF GitHub Bot logged work on BEAM-13081:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 28/Oct/21 20:33
Start Date: 28/Oct/21 20:33
Worklog Time Spent: 10m
Work Description: JiayangWu opened a new pull request #15829:
URL: https://github.com/apache/beam/pull/15829
The JVM RowCoder strips trailing 0s from the null-value bitmap, while both python and go expect all bits to be present in the encoded bitmap. This causes index-out-of-range errors when trying to decode a row encoded on the JVM in other languages in some circumstances.
This PR aims to add missing trailing 0s to the null-value bitmap to avoid the index-out-of-range error for Python Coder.
------------------------
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`ValidatesRunner` compliance status (on master branch)
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<th>Lang</th>
<th>ULR</th>
<th>Dataflow</th>
<th>Flink</th>
<th>Samza</th>
<th>Spark</th>
<th>Twister2</th>
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</thead>
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<td>---</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/">
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<td>Java</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Java_ValidatesRunner_ULR/lastCompletedBuild/">
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<td>Python</td>
<td>---</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/badge/icon?subject=V1">
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<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Py_ValCont/lastCompletedBuild/badge/icon?subject=ValCont">
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Python_PVR_Flink_Cron/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Flink/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Flink/lastCompletedBuild/badge/icon">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Samza/lastCompletedBuild/">
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<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Spark/lastCompletedBuild/badge/icon">
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<td>XLang</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Direct/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Direct/lastCompletedBuild/badge/icon">
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Examples testing status on various runners
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<th>Lang</th>
<th>ULR</th>
<th>Dataflow</th>
<th>Flink</th>
<th>Samza</th>
<th>Spark</th>
<th>Twister2</th>
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<td>Go</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
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<td>Java</td>
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Cron/lastCompletedBuild/">
<img alt="Build Status" src="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Cron/lastCompletedBuild/badge/icon?subject=V1">
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<td>---</td>
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<td>Python</td>
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<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
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<td>XLang</td>
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<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
<td>---</td>
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</table>
Post-Commit SDK/Transform Integration Tests Status (on master branch)
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<th>Go</th>
<th>Java</th>
<th>Python</th>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/">
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Pre-Commit Tests Status (on master branch)
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<th>Java</th>
<th>Python</th>
<th>Go</th>
<th>Website</th>
<th>Whitespace</th>
<th>Typescript</th>
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<td>Non-portable</td>
<td>
<a href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Cron/lastCompletedBuild/">
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<td>Portable</td>
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</tbody>
</table>
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Issue Time Tracking
-------------------
Worklog Id: (was: 671633)
Remaining Estimate: 0h
Time Spent: 10m
> Portable representation of "packed bitset indicating null fields" in beam Row format is not compatible with jvm representations
> -------------------------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-13081
> URL: https://issues.apache.org/jira/browse/BEAM-13081
> Project: Beam
> Issue Type: Bug
> Components: cross-language
> Reporter: Steve Niemitz
> Assignee: Steve Niemitz
> Priority: P2
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The JVM RowCoder strips trailing 0s from the null-value bitmap, while both python and go expect all bits to be present in the encoded bitmap. This causes index-out-of-range errors when trying to decode a row encoded on the JVM in other languages in some circumstances.
> For example, given a Row with 10 nullable fields, if the first 8 are null and the last two are set, the row will fail to decode in python, because the nullable bitmap will only have 1 byte, but the python coder expects 2.
> As discussed in the thread, the best solution here is probably to change the python (and go) coders to accept truncated nullable bitmaps.
>
> More discussion here:
> [https://lists.apache.org/thread.html/r2f148e29902bda8bb0ff7106fffb8a5494295450827ad7fd17289383%40%3Cdev.beam.apache.org%3E]
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