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  1. Beam
  2. BEAM-2948

Unable to find registrar when restoring flink job from savepoint

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.2.0
    • Component/s: runner-flink
    • Labels:
      None
    • Environment:
      Flink v1.2.1 job on a EMR cluster using Beam v2.0.0

      Description

      Reported: https://lists.apache.org/thread.html/d113707e84d7562e6d0d891830a8d85d76a497435105fe3ed1e06e13@%3Cdev.beam.apache.org%3E

      When I try to restore job from savepoint on one task manager I get the
      exception Unable to find registrar for s3n.
      The job can write files to s3 acting as a sink. So S3 access works except
      when restoring from savepoint.

      I am passing the following configuration as the pipeline
      HadoopFileSystemOptions
      options:

      Configuration configuration = new Configuration();
      configuration.set("fs.defaultFS", String.format("s3n://%s",
      jobOptions.getOutputFileSystemRoot()));
      configuration.set("fs.default.name", String.format("s3n://%s",
      jobOptions.getOutputFileSystemRoot()));
      configuration.set("fs.s3.impl",
      "org.apache.hadoop.fs.s3native.NativeS3FileSystem");
      configuration.set("fs.s3n.awsAccessKeyId",
      jobOptions.getAwsAccessKey());
      configuration.set("fs.s3n.awsSecretAccessKey",
      jobOptions.getAwsSecretKey());

      From my investigation it looks like Beam FileSystems.
      setDefaultPipelineOptions method is not called before
      org.apache.beam.sdk.io.FileBasedSink$FileResultCoder relay on initialised
      FileSystems.SCHEME_TO_FILESYSTEM map

      java.lang.IllegalStateException: Could not initialize keyed state backend.
      at
      org.apache.flink.streaming.api.operators.AbstractStreamOperator.initKeyedState(AbstractStreamOperator.java:293)
      at
      org.apache.flink.streaming.api.operators.AbstractStreamOperator.initializeState(AbstractStreamOperator.java:204)
      at
      org.apache.flink.streaming.runtime.tasks.StreamTask.initializeOperators(StreamTask.java:653)
      at
      org.apache.flink.streaming.runtime.tasks.StreamTask.initializeState(StreamTask.java:640)
      at
      org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:246)
      at org.apache.flink.runtime.taskmanager.Task.run(Task.java:665)
      at java.lang.Thread.run(Thread.java:748)
      Caused by: java.lang.IllegalStateException: Unable to find registrar for s3n
      at
      org.apache.beam.sdk.io.FileSystems.getFileSystemInternal(FileSystems.java:447)
      at org.apache.beam.sdk.io.FileSystems.matchNewResource(FileSystems.java:523)
      at
      org.apache.beam.sdk.io.FileBasedSink$FileResultCoder.decode(FileBasedSink.java:1059)
      at
      org.apache.beam.sdk.io.FileBasedSink$FileResultCoder.decode(FileBasedSink.java:1020)
      at
      org.apache.beam.runners.flink.translation.types.CoderTypeSerializer.deserialize(CoderTypeSerializer.java:87)
      at
      org.apache.flink.runtime.state.ArrayListSerializer.deserialize(ArrayListSerializer.java:87)
      at
      org.apache.flink.runtime.state.ArrayListSerializer.deserialize(ArrayListSerializer.java:27)
      at
      org.apache.flink.runtime.state.heap.HeapKeyedStateBackend.readStateTableForKeyGroup(HeapKeyedStateBackend.java:370)
      at
      org.apache.flink.runtime.state.heap.HeapKeyedStateBackend.restorePartitionedState(HeapKeyedStateBackend.java:340)
      at
      org.apache.flink.runtime.state.heap.HeapKeyedStateBackend.restore(HeapKeyedStateBackend.java:243)
      at
      org.apache.flink.streaming.runtime.tasks.StreamTask.createKeyedStateBackend(StreamTask.java:788)
      at
      org.apache.flink.streaming.api.operators.AbstractStreamOperator.initKeyedState(AbstractStreamOperator.java:284)
      ... 6 more

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              • Assignee:
                aljoscha Aljoscha Krettek
                Reporter:
                lcwik Luke Cwik
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                Dates

                • Created:
                  Updated:
                  Resolved: