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Posted to commits@beam.apache.org by "Eugene Kirpichov (JIRA)" <ji...@apache.org> on 2018/07/12 22:00:00 UTC

[jira] [Created] (BEAM-4778) Less wasteful ArtifactStagingService

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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