[jira] [Updated] (FLINK-10203) Support truncate method for old Hadoop versions in HadoopRecoverableFsDataOutputStream

["Artsem Semianenka (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-10203?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Artsem Semianenka updated FLINK-10203:
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    Summary: Support truncate method for old Hadoop versions in HadoopRecoverableFsDataOutputStream  (was: HadoopRecoverableFsDataOutputStream does not support Hadoop 2.6)

> Support truncate method for old Hadoop versions in HadoopRecoverableFsDataOutputStream
> --------------------------------------------------------------------------------------
>
>                 Key: FLINK-10203
>                 URL: https://issues.apache.org/jira/browse/FLINK-10203
>             Project: Flink
>          Issue Type: Bug
>          Components: DataStream API, filesystem-connector
>    Affects Versions: 1.6.0, 1.6.1, 1.7.0
>            Reporter: Artsem Semianenka
>            Priority: Major
>
> New StreamingFileSink ( introduced in 1.6 Flink version ) use HadoopRecoverableFsDataOutputStream wrapper to write data in HDFS.
> HadoopRecoverableFsDataOutputStream is an wrapper on FSDataOutputStream to have an ability to restore from certain point of file after failure and continue write data. To achive this recover functionality the HadoopRecoverableFsDataOutputStream use "truncate" method which was introduced only in Hadoop 2.7 .
> Unfortently there are a few official Hadoop distibutives which latast version still use Hadoop 2.6 (This distibutives: Cloudera, Pivotal HD ). As the result Flink can't work with this distibutives.
> Flink declares that supported Hadoop from version 2.4.0 upwards (https://ci.apache.org/projects/flink/flink-docs-release-1.6/start/building.html#hadoop-versions)
> I guess we should emulate the functionality of "truncate" method for older Hadoop versions.



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