[BEAM-8547] Portable Wordcount fails with on stadalone Flink cluster

• Type: Bug
• Status: Resolved
• Priority: P2
• Resolution: Won't Fix
• Fix Version/s: Not applicable
• Component/s: runner-flink, sdk-py-harness
• Labels: stale-P2
• Assignee: Kyle Weaver
• Reporter: Valentyn Tymofieiev
• Created: 02/Nov/19 01:59
• Updated: 16/Sep/20 20:07
• Resolved: 02/Jun/20 18:20

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: ibzib goenka robertwb

Issue Links

• links to: GitHub Pull Request #12857