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https://issues.apache.org/jira/browse/BEAM-9252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17045109#comment-17045109
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Luke Cwik commented on BEAM-9252:
---------------------------------

This task still requires validation that JB's project can shade.

> Problem shading Beam pipeline with Beam 2.20.0-SNAPSHOT
> -------------------------------------------------------
>
>                 Key: BEAM-9252
>                 URL: https://issues.apache.org/jira/browse/BEAM-9252
>             Project: Beam
>          Issue Type: Bug
>          Components: build-system
>    Affects Versions: 2.20.0
>            Reporter: Ismaël Mejía
>            Assignee: Luke Cwik
>            Priority: Critical
>             Fix For: 2.20.0
>
>         Attachments: ArrayIndexOutOfBoundsException.png, 
> image-2020-02-21-13-22-01-341.png
>
>          Time Spent: 3.5h
>  Remaining Estimate: 0h
>
> I was checking today a pipeline against the latest 2.20.0-SNAPSHOT and I 
> found that it works perfectly with version 2.19.0, but it is failing with a  
> shade related exception that refers to grpc 1.26.0:
> {{[ERROR] Failed to execute goal 
> org.apache.maven.plugins:maven-shade-plugin:3.2.1:shade (default) on project 
> EventsToIOs: Error creating shaded jar: Problem shading JAR 
> /home/ismael/.m2/repository/org/apache/beam/beam-vendor-grpc-1_26_0/0.1/beam-vendor-grpc-1_26_0-0.1.jar
>  entry org/apache/beam/vendor/grpc/v1p26p0/org/jboss/modules/Main.class: 
> org.apache.maven.plugin.MojoExecutionException: Error in ASM processing class 
> org/apache/beam/vendor/grpc/v1p26p0/org/jboss/modules/Main.class: 65536 -> 
> [Help 1]}}
> {{There is also a warning that is not present in the build against 2.19.0}}
> {{[WARNING] Discovered module-info.class. Shading will break its strong 
> encapsulation.}}
>  
> I wonder if we are not doing something wrong during our vendoring, can 
> someone take a look please.
> This is relatively easy to reproduce with the beam-samples repo, just clone 
> it and run:
> {noformat}
> git clone https://github.com/jbonofre/beam-samples
> mvn clean verify -Pbeam-release-repo -Dbeam.version=2.20.0-SNAPSHOT
> {noformat}
> Available logs of the latest run:
> [https://github.com/jbonofre/beam-samples/runs/427537544?check_suite_focus=true]
>  



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