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https://issues.apache.org/jira/browse/BEAM-4742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16537466#comment-16537466
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Ryan Williams commented on BEAM-4742:
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OK these were both basically mistakes on my part:
{{FileBasedSink.initialize_write }} [creates the directories containing the
output
path|https://github.com/apache/beam/blob/a8eaa1b3ec0544de8b56dd504bc249d4c1a2017f/sdks/python/apache_beam/io/filebasedsink.py#L162],
so [~angoenka]'s guess as to why I might've seen the {{IOError}} above is that
I had a typo in the output path and was trying to create a top-level directory
I didn't have permissions for (e.g. {{/tmpz}}).
On the point about observing the output of a portable wordcount example, the
output gets written to the filesystem inside the docker container; {{docker
ps}} will display the ID of the container, {{docker exec -it <id> bash}} will
attach a shell to it, and then {{ls}} etc will allow inspecting the output
files.
[The metrics normally collected/logged when running wordcount in
{{DirectRunner}}|https://github.com/apache/beam/blob/f063b157eea480d079c4e966e528eef050a0c192/sdks/python/apache_beam/examples/wordcount.py#L121-L134]
are not collected and/or not output in {{PortableRunner}} atm.
> Allow custom docker-image in portable wordcount example
> -------------------------------------------------------
>
> Key: BEAM-4742
> URL: https://issues.apache.org/jira/browse/BEAM-4742
> Project: Beam
> Issue Type: Improvement
> Components: examples-python
> Affects Versions: 2.5.0
> Reporter: Ryan Williams
> Assignee: Ryan Williams
> Priority: Minor
> Time Spent: 2h
> Remaining Estimate: 0h
>
> I hit a couple snags [running the portable wordcount
> example|https://github.com/apache/beam/blob/997ee3afe74483ae44e2dcb32ca0e24876129cd9/sdks/python/build.gradle#L200-L214]:
> * -[the default docker image is hard-coded to a bintray
> URL|https://github.com/apache/beam/blob/997ee3afe74483ae44e2dcb32ca0e24876129cd9/sdks/python/apache_beam/runners/portability/portable_runner.py#L60-L68],
> but I published my image to Docker Hub- I missed that [there's already a
> pipeline option for
> this|https://github.com/apache/beam/pull/5902#discussion_r201071859]! Thanks
> [~lcwik]
> * the default output path is in a temporary directory that doesn't exist at
> the time of the {{open}} call, so I got {{IOError: [Errno 2] No such file or
> directory}}
> I'll send a PR with fixes to each of these shortly.
> I've also not found where to observe output from successfully running the
> example.
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