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https://issues.apache.org/jira/browse/HBASE-27328?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17584814#comment-17584814
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Nick Dimiduk commented on HBASE-27328:
--------------------------------------

Okay no, the multi-threaded build is interleaving log lines. I believe this 
enforcer rule is the reason that the build fails. Here's the log output with a 
bit more context.

{noformat}
[INFO] --- maven-enforcer-plugin:3.0.0-M3:enforce (check-aggregate-license) @ 
hbase-shaded-client-byo-hadoop ---
[INFO] 
[INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ 
hbase-shaded-client ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory 
/home/jenkins/jenkins-home/workspace/HBase_Nightly_branch-2.4/component/hbase-shaded/hbase-shaded-client/src/main/resources
[INFO] Copying 3 resources
[INFO] Copying 3 resources
[INFO] 
[INFO] --- maven-enforcer-plugin:3.0.0-M3:enforce (check-aggregate-license) @ 
hbase-shaded-client ---
[INFO] 
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ 
hbase-shaded-client-byo-hadoop ---
[WARNING] Rule 0: org.apache.maven.plugins.enforcer.EvaluateBeanshell failed 
with message:
Couldn't evaluate condition: File license = new 
File("/home/jenkins/jenkins-home/workspace/HBase_Nightly_branch-2.4/component/hbase-shaded/hbase-shaded-client/target/maven-shared-archive-resources/META-INF/LICENSE");

                    // Beanshell does not support try-with-resources,
                    // so we must close this scanner manually
                    Scanner scanner = new Scanner(license);

                    while (scanner.hasNextLine()) {
                      if (scanner.nextLine().startsWith("ERROR:")) {
                        scanner.close();
                        return false;
                      }
                    }
                    scanner.close();
                    return true;
[INFO] No sources to compile
{noformat}

> Enforcer phase EvaluateBeanShell fails occasionally
> ---------------------------------------------------
>
>                 Key: HBASE-27328
>                 URL: https://issues.apache.org/jira/browse/HBASE-27328
>             Project: HBase
>          Issue Type: Task
>          Components: build
>            Reporter: Nick Dimiduk
>            Priority: Major
>
> For example, from 
> https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.4/412/General_20Nightly_20Build_20Report/
> {noformat}
> [INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ 
> hbase-shaded-client-byo-hadoop ---
> [WARNING] Rule 0: org.apache.maven.plugins.enforcer.EvaluateBeanshell failed 
> with message:
> Couldn't evaluate condition: File license = new 
> File("/home/jenkins/jenkins-home/workspace/HBase_Nightly_branch-2.4/component/hbase-shaded/hbase-shaded-client/target/maven-shared-archive-resources/META-INF/LICENSE");
>                     // Beanshell does not support try-with-resources,
>                     // so we must close this scanner manually
>                     Scanner scanner = new Scanner(license);
>                     while (scanner.hasNextLine()) {
>                       if (scanner.nextLine().startsWith("ERROR:")) {
>                         scanner.close();
>                         return false;
>                       }
>                     }
>                     scanner.close();
>                     return true;
> [INFO] No sources to compile
> {noformat}



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