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https://issues.apache.org/jira/browse/SPARK-22788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16291602#comment-16291602
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Apache Spark commented on SPARK-22788:
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User 'vanzin' has created a pull request for this issue:
https://github.com/apache/spark/pull/19983
> HdfsUtils.getOutputStream uses non-existent Hadoop conf "hdfs.append.support"
> -----------------------------------------------------------------------------
>
> Key: SPARK-22788
> URL: https://issues.apache.org/jira/browse/SPARK-22788
> Project: Spark
> Issue Type: Bug
> Components: DStreams
> Affects Versions: 1.6.0
> Reporter: Marcelo Vanzin
> Priority: Trivial
>
> Code:
> {noformat}
> if (conf.getBoolean("hdfs.append.support", false) ||
> dfs.isInstanceOf[RawLocalFileSystem]) {
> dfs.append(dfsPath)
> } else {
> throw new IllegalStateException("File exists and there is no append
> support!")
> }
> {noformat}
> This makes the exception to be thrown if you enable
> {{writeAheadLog.closeFileAfterWrite}} with HDFS.
> The correct config, from {{DFSConfigKeys}}, is {{dfs.support.append}}, and
> the default value is true.
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