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https://issues.apache.org/jira/browse/BEAM-2995?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17546717#comment-17546717
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Kenneth Knowles commented on BEAM-2995:
---------------------------------------
This issue has been migrated to https://github.com/apache/beam/issues/18553
> can't read/write hdfs in Flink CLUSTER(Standalone)
> --------------------------------------------------
>
> Key: BEAM-2995
> URL: https://issues.apache.org/jira/browse/BEAM-2995
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Affects Versions: 2.2.0
> Reporter: huangjianhuang
> Priority: P3
>
> i just write a simple demo like:
> {code:java}
> Configuration conf = new Configuration();
> conf.set("fs.default.name", "hdfs://localhost:9000");
> //other codes
> p.apply("ReadLines",
> TextIO.read().from("hdfs://localhost:9000/tmp/words"))
>
> .apply(TextIO.write().to("hdfs://localhost:9000/tmp/hdfsout"));
> {code}
> it works in flink local model with cmd:
> {code:java}
> mvn exec:java -Dexec.mainClass=com.joe.FlinkWithHDFS -Pflink-runner
> -Dexec.args="--runner=FlinkRunner
> --filesToStage=target/flinkBeam-2.2.0-SNAPSHOT-shaded.jar"
> {code}
> but not works in CLUSTER mode:
> {code:java}
> mvn exec:java -Dexec.mainClass=com.joe.FlinkWithHDFS -Pflink-runner
> -Dexec.args="--runner=FlinkRunner
> --filesToStage=target/flinkBeam-2.2.0-SNAPSHOT-shaded.jar
> --flinkMaster=localhost:6123 "
> {code}
> it seems the flink cluster regard the hdfs as local file system.
> The input log from flink-jobmanger.log is:
> {code:java}
> 2017-09-27 20:17:37,962 INFO org.apache.flink.runtime.jobmanager.JobManager
> - Successfully ran initialization on master in 136 ms.
> 2017-09-27 20:17:37,968 INFO org.apache.beam.sdk.io.FileBasedSource
> - {color:red}Filepattern hdfs://localhost:9000/tmp/words2
> matched 0 files with total size 0{color}
> 2017-09-27 20:17:37,968 INFO org.apache.beam.sdk.io.FileBasedSource
> - Splitting filepattern hdfs://localhost:9000/tmp/words2 into
> bundles of size 0 took 0 ms and produced 0 files a
> nd 0 bundles
> {code}
> The output error message is :
> {code:java}
> Caused by: java.lang.ClassCastException:
> {color:red}org.apache.beam.sdk.io.hdfs.HadoopResourceId cannot be cast to
> org.apache.beam.sdk.io.LocalResourceId{color}
> at
> org.apache.beam.sdk.io.LocalFileSystem.create(LocalFileSystem.java:77)
> at org.apache.beam.sdk.io.FileSystems.create(FileSystems.java:256)
> at org.apache.beam.sdk.io.FileSystems.create(FileSystems.java:243)
> at
> org.apache.beam.sdk.io.FileBasedSink$Writer.open(FileBasedSink.java:922)
> at
> org.apache.beam.sdk.io.FileBasedSink$Writer.openUnwindowed(FileBasedSink.java:884)
> at
> org.apache.beam.sdk.io.WriteFiles.finalizeForDestinationFillEmptyShards(WriteFiles.java:909)
> at org.apache.beam.sdk.io.WriteFiles.access$900(WriteFiles.java:110)
> at
> org.apache.beam.sdk.io.WriteFiles$2.processElement(WriteFiles.java:858)
> {code}
> can somebody help me, i've try all the way just can't work it out [cry]
> https://issues.apache.org/jira/browse/BEAM-2457
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