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https://issues.apache.org/jira/browse/BEAM-2899?focusedWorklogId=108202&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-108202
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ASF GitHub Bot logged work on BEAM-2899:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Jun/18 21:06
            Start Date: 01/Jun/18 21:06
    Worklog Time Spent: 10m 
      Work Description: lukecwik commented on a change in pull request #5535: 
[BEAM-2899] Use Docker in the ReferenceRunner
URL: https://github.com/apache/beam/pull/5535#discussion_r192515538
 
 

 ##########
 File path: 
runners/direct-java/src/test/java/org/apache/beam/runners/direct/portable/artifact/UnsupportedArtifactRetrievalServiceTest.java
 ##########
 @@ -0,0 +1,153 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
 
 Review comment:
   nit: empty line in license header.

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

    Worklog Id:     (was: 108202)
    Time Spent: 50m  (was: 40m)

> Universal Local Runner
> ----------------------
>
>                 Key: BEAM-2899
>                 URL: https://issues.apache.org/jira/browse/BEAM-2899
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-core
>            Reporter: Henning Rohde
>            Assignee: Thomas Groh
>            Priority: Major
>              Labels: portability
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> To make the portability effort tractable, we should implement a Universal 
> Local Runner (ULR) in Java that runs in a single server process plus docker 
> containers for the SDK harness containers. It would serve multiple purposes:
>   (1) A reference implementation for other runners. Ideally, any new feature 
> should be implemented in the ULR first.
>   (2) A fully-featured test runner for SDKs who participate in the 
> portability framework. It thus complements the direct runners.
>   (3) A test runner for user code that depends on or customizes the runtime 
> environment. For example, a DoFn that shells out has a dependency that may be 
> satisfied on the user's desktop (and thus works fine on the direct runner), 
> but perhaps not by the container harness image. The ULR allows for an easy 
> way to find out.
> The Java direct runner presumably has lots of pieces that can be reused.



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