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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Work logged] (BEAM-4778) Less wasteful ArtifactStagingService
Date Thu, 02 Aug 2018 03:50:00 GMT

     [ https://issues.apache.org/jira/browse/BEAM-4778?focusedWorklogId=130083&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-130083
]

ASF GitHub Bot logged work on BEAM-4778:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/Aug/18 03:49
            Start Date: 02/Aug/18 03:49
    Worklog Time Spent: 10m 
      Work Description: tweise commented on a change in pull request #5958: [BEAM-4778] add
option to flink job server to clean staged artifacts per-job
URL: https://github.com/apache/beam/pull/5958#discussion_r207094635
 
 

 ##########
 File path: runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/artifact/BeamFileSystemArtifactStagingService.java
 ##########
 @@ -329,6 +335,29 @@ private void setBasePath(String basePath) {
       this.basePath = basePath;
     }
 
+    public String encode() throws Exception {
+      try {
+        return MAPPER.writeValueAsString(this);
+      } catch (JsonProcessingException e) {
+        LOG.error("Error {} occurred while serializing {}.", e.getMessage(), this);
 
 Review comment:
   Why logging vs. using `StatusRuntimeException` as shown below? 

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 130083)
    Time Spent: 5h 10m  (was: 5h)

> 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
>            Priority: Major
>          Time Spent: 5h 10m
>  Remaining Estimate: 0h
>
> [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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