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  1. Beam
  2. BEAM-8547

Portable Wordcount fails with on stadalone Flink cluster

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    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Labels:
      None

      Description

      Repro:

      1. git checkout origin/release-2.16.0
      2. ./flink-1.8.2/bin/start-cluster.sh
      3. gradlew :runners:flink:1.8:job-server:runShadow -PflinkMasterUrl=localhost:8081
      4. python -m apache_beam.examples.wordcount --input=/etc/profile --output=/tmp/py-wordcount-direct --runner=PortableRunner --experiments=worker_threads=100 --parallelism=1 --shutdown_sources_on_final_watermark --sdk_worker_parallelism=1 --environment_cache_millis=60000 --job_endpoint=localhost:8099

      This causes the runner to crash with:

      Traceback (most recent call last):
        File "/usr/local/lib/python3.7/site-packages/apache_beam/runners/worker/sdk_worker.py", line 158, in _execute
          response = task()
        File "/usr/local/lib/python3.7/site-packages/apache_beam/runners/worker/sdk_worker.py", line 191, in <lambda>
          self._execute(lambda: worker.do_instruction(work), work)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/runners/worker/sdk_worker.py", line 343, in do_instruction
          request.instruction_id)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/runners/worker/sdk_worker.py", line 369, in process_bundle
          bundle_processor.process_bundle(instruction_id))
        File "/usr/local/lib/python3.7/site-packages/apache_beam/runners/worker/bundle_processor.py", line 663, in process_bundle
          data.ptransform_id].process_encoded(data.data)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/runners/worker/bundle_processor.py", line 143, in process_encoded
          self.output(decoded_value)
        File "apache_beam/runners/worker/operations.py", line 255, in apache_beam.runners.worker.operations.Operation.output
        File "apache_beam/runners/worker/operations.py", line 256, in apache_beam.runners.worker.operations.Operation.output
        File "apache_beam/runners/worker/operations.py", line 143, in apache_beam.runners.worker.operations.SingletonConsumerSet.receive
        File "apache_beam/runners/worker/operations.py", line 593, in apache_beam.runners.worker.operations.DoOperation.process
        File "apache_beam/runners/worker/operations.py", line 594, in apache_beam.runners.worker.operations.DoOperation.process
        File "apache_beam/runners/common.py", line 776, in apache_beam.runners.common.DoFnRunner.receive
        File "apache_beam/runners/common.py", line 782, in apache_beam.runners.common.DoFnRunner.process
        File "apache_beam/runners/common.py", line 849, in apache_beam.runners.common.DoFnRunner._reraise_augmented
        File "/usr/local/lib/python3.7/site-packages/future/utils/__init__.py", line 421, in raise_with_traceback
          raise exc.with_traceback(traceback)
        File "apache_beam/runners/common.py", line 780, in apache_beam.runners.common.DoFnRunner.process
        File "apache_beam/runners/common.py", line 587, in apache_beam.runners.common.PerWindowInvoker.invoke_process
        File "apache_beam/runners/common.py", line 660, in apache_beam.runners.common.PerWindowInvoker._invoke_process_per_window
        File "/usr/local/lib/python3.7/site-packages/apache_beam/io/iobase.py", line 1042, in process
          self.writer = self.sink.open_writer(init_result, str(uuid.uuid4()))
        File "/usr/local/lib/python3.7/site-packages/apache_beam/options/value_provider.py", line 137, in _f
          return fnc(self, *args, **kwargs)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/io/filebasedsink.py", line 186, in open_writer
          return FileBasedSinkWriter(self, writer_path)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/io/filebasedsink.py", line 390, in __init__
          self.temp_handle = self.sink.open(temp_shard_path)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/io/textio.py", line 391, in open
          file_handle = super(_TextSink, self).open(temp_path)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/options/value_provider.py", line 137, in _f
          return fnc(self, *args, **kwargs)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/io/filebasedsink.py", line 129, in open
          return FileSystems.create(temp_path, self.mime_type, self.compression_type)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/io/filesystems.py", line 203, in create
          return filesystem.create(path, mime_type, compression_type)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/io/localfilesystem.py", line 151, in create
          return self._path_open(path, 'wb', mime_type, compression_type)
        File "/usr/local/lib/python3.7/site-packages/apache_beam/io/localfilesystem.py", line 134, in _path_open
          raw_file = open(path, mode)
      RuntimeError: FileNotFoundError: [Errno 2] No such file or directory: '/tmp/beam-temp-py-wordcount-direct-ea951c18fd1211e9ac84a0c589d778c3/d39e13af-277b-437e-89f2-e00249287e1d.py-wordcount-direct' [while running 'write/Write/WriteImpl/WriteBundles'] 

      The error happens with Flink 1.5 and Flink 1.8.

      The error does not happen if we run SDK harness in LOOPBACK mode (--environment_type=LOOPBACK)

      The error does not happen if we launch Flink jobServer without pointing to a Flink cluster, that is if we remove -PflinkMasterUrl=localhost:8081, or if we use Spark Jobserver + Spark cluster, so this seems to be a Flink-specific problem

      Similar error: https://issues.apache.org/jira/browse/BEAM-7859

      Note that default parallelism parameters set in portableWordCountBatch are not compatible with default configuration of standalone Flink cluster, which starts with only one available slot.

      cc: Kyle Weaver Ankur Goenka Robert Bradshaw

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            • Assignee:
              Unassigned
              Reporter:
              tvalentyn Valentyn Tymofieiev
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              • Created:
                Updated: