GitHub user aljoscha opened a pull request: https://github.com/apache/beam/pull/3855
[BEAM-2948] Register default FileSystems in StreamOperator.setup() Unfortunately, we currently can't test this fix because there are so many places where `FileSystems.setDefaultPipelineOptions()` is called so in a unit test/IT case environments we already always had the right registrars registered. You can merge this pull request into a Git repository by running: $ git pull https://github.com/aljoscha/beam jira-2948-fix-filesystems-registrar-flink Alternatively you can review and apply these changes as the patch at: https://github.com/apache/beam/pull/3855.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #3855 ---- commit d3ac95e995f517e398436ef6efc92d765b182b1a Author: Aljoscha Krettek <aljoscha.kret...@gmail.com> Date: 2017-09-15T09:20:43Z [BEAM-2948] Register default FileSystems in StreamOperator.setup() ---- ---