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Posted to common-issues@hadoop.apache.org by "asin (JIRA)" <ji...@apache.org> on 2018/12/27 12:12:00 UTC
[jira] [Updated] (HADOOP-16021) SequenceFile.createWriter
appendIfExists codec cause NullPointerException
[ https://issues.apache.org/jira/browse/HADOOP-16021?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
asin updated HADOOP-16021:
--------------------------
Description:
I want append the data in a file , when i use SequenceFile.appendIfExists , it throw NullPointerException at at org.apache.hadoop.io.SequenceFile$Writer.(SequenceFile.java:1119)
when i remove the 'appendIfExists', it works, but it will cover old file.
when i try use CompressionType.RECORD or CompressionType.BLOCK throw "not support" exception
{code:java}
// my code
SequenceFile.Writer writer = null;
writer = SequenceFile.createWriter(conf,
SequenceFile.Writer.file(path),
SequenceFile.Writer.keyClass(Text.class),
SequenceFile.Writer.valueClass(Text.class),
SequenceFile.Writer.appendIfExists(true) );
{code}
{{more info see:[https://stackoverflow.com/questions/53943978/hadoop-sequencefile-createwriter-appendifexists-codec-cause-nullpointerexception]}}
was:
I want append the data in a file , when i use SequenceFile.appendIfExists , it throw NullPointerException at at org.apache.hadoop.io.SequenceFile$Writer.(SequenceFile.java:1119)
when i remove the 'appendIfExists', it works, but it will cover old file.
when i try use CompressionType.RECORD or CompressionType.BLOCK throw "not support" exception
{code:java}
// my code
SequenceFile.Writer writer = null; writer = SequenceFile.createWriter(conf, SequenceFile.Writer.file(path), SequenceFile.Writer.keyClass(Text.class), SequenceFile.Writer.valueClass(Text.class), SequenceFile.Writer.appendIfExists(true) );
{code}
{{more info see:https://stackoverflow.com/questions/53943978/hadoop-sequencefile-createwriter-appendifexists-codec-cause-nullpointerexception}}
> SequenceFile.createWriter appendIfExists codec cause NullPointerException
> -------------------------------------------------------------------------
>
> Key: HADOOP-16021
> URL: https://issues.apache.org/jira/browse/HADOOP-16021
> Project: Hadoop Common
> Issue Type: Bug
> Components: common
> Affects Versions: 2.7.3
> Environment: windows10, hadoop2.7.3, jdk8
> Reporter: asin
> Priority: Major
> Labels: bug
> Attachments: 57.png
>
>
>
> I want append the data in a file , when i use SequenceFile.appendIfExists , it throw NullPointerException at at org.apache.hadoop.io.SequenceFile$Writer.(SequenceFile.java:1119)
> when i remove the 'appendIfExists', it works, but it will cover old file.
>
> when i try use CompressionType.RECORD or CompressionType.BLOCK throw "not support" exception
>
> {code:java}
> // my code
> SequenceFile.Writer writer = null;
> writer = SequenceFile.createWriter(conf,
> SequenceFile.Writer.file(path),
> SequenceFile.Writer.keyClass(Text.class),
> SequenceFile.Writer.valueClass(Text.class),
> SequenceFile.Writer.appendIfExists(true) );
> {code}
>
>
> {{more info see:[https://stackoverflow.com/questions/53943978/hadoop-sequencefile-createwriter-appendifexists-codec-cause-nullpointerexception]}}
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