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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8230) NPE in OrcRowInputFormat on nested structs
Date Fri, 26 Jan 2018 20:22:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16341536#comment-16341536

ASF GitHub Bot commented on FLINK-8230:

GitHub user fhueske opened a pull request:


    [FLINK-8230] [orc] Fix NPEs when reading nested columns.

    ## What is the purpose of the change
    - fixes NPEs for null-valued structs, lists, and maps
    - fixes NPEs for repeating structs, lists, and maps
    ## Brief change log
    - renamed `OrcUtils` to `OrcBatchReader`
    - reimplement large parts of the `OrcBatchReader`
    - add tests for nested columns with nulls and repeating values
    - added a class to generate ORC files for tests
    ## Verifying this change
    - added tests to `OrcInputFormatTest`
    - changes have been verified by a user on a production dataset.
    ## Does this pull request potentially affect one of the following parts:
      - Dependencies (does it add or upgrade a dependency): **no**
      - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: **no**
      - The serializers: **no**
      - The runtime per-record code paths (performance sensitive): **no**
      - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing,
Yarn/Mesos, ZooKeeper: **no**
      - The S3 file system connector: **no**
    ## Documentation
      - Does this pull request introduce a new feature? **no**
      - If yes, how is the feature documented? **n/a**

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

    $ git pull https://github.com/fhueske/flink orcNPE

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 #5373
commit 97fd0c7687eff6f8b84516f4d8ab8268cab838b1
Author: Fabian Hueske <fhueske@...>
Date:   2017-12-12T11:09:14Z

    [FLINK-8230] [orc] Fix NPEs when reading nested columns.
    - fixes NPEs for null-valued structs, lists, and maps
    - fixes NPEs for repeating structs, lists, and maps
    - adds test for deeply nested data with nulls
    - adds test for columns with repeating values


> NPE in OrcRowInputFormat on nested structs
> ------------------------------------------
>                 Key: FLINK-8230
>                 URL: https://issues.apache.org/jira/browse/FLINK-8230
>             Project: Flink
>          Issue Type: Bug
>          Components: Batch Connectors and Input/Output Formats
>    Affects Versions: 1.4.0
>            Reporter: Sebastian Klemke
>            Assignee: Fabian Hueske
>            Priority: Blocker
>             Fix For: 1.5.0, 1.4.1
> OrcRowInputFormat ignores isNull and isRepeating on nested struct columns. If a struct
column contains nulls, it tries to read struct fields, leading to NPE in case of string fields:
> {code}
> java.lang.NullPointerException
> 	at java.lang.String.checkBounds(String.java:384)
> 	at java.lang.String.<init>(String.java:462)
> 	at org.apache.flink.orc.OrcUtils.readNonNullBytesColumnAsString(OrcUtils.java:392)
> 	at org.apache.flink.orc.OrcUtils.readField(OrcUtils.java:215)
> 	at org.apache.flink.orc.OrcUtils.readStructColumn(OrcUtils.java:1203)
> 	at org.apache.flink.orc.OrcUtils.readField(OrcUtils.java:252)
> 	at org.apache.flink.orc.OrcUtils.readNonNullStructColumn(OrcUtils.java:677)
> 	at org.apache.flink.orc.OrcUtils.readField(OrcUtils.java:250)
> 	at org.apache.flink.orc.OrcUtils.fillRows(OrcUtils.java:142)
> 	at org.apache.flink.orc.OrcRowInputFormat.ensureBatch(OrcRowInputFormat.java:334)
> 	at org.apache.flink.orc.OrcRowInputFormat.reachedEnd(OrcRowInputFormat.java:314)
> 	at org.apache.flink.runtime.operators.DataSourceTask.invoke(DataSourceTask.java:165)
> 	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
> 	at java.lang.Thread.run(Thread.java:748)
> {code}

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