Eugene Kirpichov created BEAM-4778:
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Summary: Less wasteful ArtifactStagingService
Key: BEAM-4778
URL: https://issues.apache.org/jira/browse/BEAM-4778
Project: Beam
Issue Type: Bug
Components: runner-core
Reporter: Eugene Kirpichov
Assignee: Ryan Williams
[https://github.com/apache/beam/blob/master/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/artifact/BeamFileSystemArtifactStagingService.java]
is the main implementation of ArtifactStagingService.
It stages artifacts into a directory; and in practice the passed staging
session token is such that the directory is different for every job. This leads
to 2 issues:
* It doesn't get cleaned up when the job finishes or even when the JobService
shuts down, so we have disk space leaks if running a lot of jobs (e.g. a suite
of ValidatesRunner tests)
* We repeatedly re-stage the same artifacts. Instead, ideally, we should
identify that some artifacts don't need to be staged - based on knowing their
md5. The artifact staging protocol has rudimentary support for this but may
need to be modified.
CC: [~angoenka]
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