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https://issues.apache.org/jira/browse/SPARK-21470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16093750#comment-16093750
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Maciej Bryński commented on SPARK-21470:
----------------------------------------
OK.
I think I found the reason.
There were no HADOOP_CONF_DIR env variable.
> [SPARK 2.2 Regression] Spark History server doesn't support HDFS HA
> -------------------------------------------------------------------
>
> Key: SPARK-21470
> URL: https://issues.apache.org/jira/browse/SPARK-21470
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.2.0
> Reporter: Maciej Bryński
>
> With Spark version up to 2.1.1 there was possibility to config history server
> to read from hdfs without putting namenode:
> spark.history.fs.logDirectory hdfs:///apps/spark
> And this works with HDFS HA.
> Unfortunately there is regression with Spark 2.2.0 when such configuration
> gives error:
> {code}
> Caused by: java.io.IOException: Incomplete HDFS URI, no host:
> hdfs:///apps/spark
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:142)
> at
> org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2596)
> at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:91)
> at
> org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2630)
> at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2612)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:370)
> at org.apache.hadoop.fs.Path.getFileSystem(Path.java:296)
> at
> org.apache.spark.deploy.history.FsHistoryProvider.<init>(FsHistoryProvider.scala:108)
> at
> org.apache.spark.deploy.history.FsHistoryProvider.<init>(FsHistoryProvider.scala:78)
> ... 6 more
> {code}
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