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https://issues.apache.org/jira/browse/MNG-5571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15497379#comment-15497379
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Matt Nelson commented on MNG-5571:
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There are alternatives that could supply a correct command.
* Update the command to include a {{-pl b,c,d}} option that includes all the
modules that had not finished building.
* Use the reactor dependency graph to only supply the next nodes in the tree
with the also make flag, {{-pl b,c -am}}
> Instructions to resume the build can be misleading with -T parallel builds
> --------------------------------------------------------------------------
>
> Key: MNG-5571
> URL: https://issues.apache.org/jira/browse/MNG-5571
> Project: Maven
> Issue Type: Bug
> Reporter: Derek Lewis
> Priority: Minor
> Attachments: resume-from-testcase.zip
>
>
> In a project with many modules that are able to build in parallel, if one
> fails the build, the output says to use -rf to resume from that module.
> However, this may not run the other modules that were running in parallel.
> If one of those modules also had failures, but had not yet reached those
> failures during the first build, and those modules aren't build in the second
> build, the build will pass, despite these 'hidden' errors.
> In the example I've attached, there are four submodules, a, b, c and d.
> Module d depends on a, b, and c, and all modules share a common parent module.
> The properties fail.a, fail.b, and fail.c will cause the respective module to
> fail.
> Build first with just "mvn install -T4".
> Next, imagine making a change in modules a, b, and c that break them, and
> build with "mvn install -T4 -Dfail.a -Dfail.b -Dfail.c"
> Due to the timing in the test poms (using antrun sleep), this should print:
> {noformat}
> [ERROR] After correcting the problems, you can resume the build with the
> command
> [ERROR] mvn <goals> -rf :c
> {noformat}
> Above that, you will see it reporting the failure of all three modules, but
> in a lot of cases where there are surefire tests failing, it's extremely
> difficult to tell that more than one module failed. As a result, I generally
> just look at the module it's told me to resume from, to find failures.
> So, pretend you've done that, but the errors in a and b remain, and run "mvn
> install -T4 -Dfail.a -Dfail.b -rf :c" as it's suggested.
> The build passes, giving a false sense of confidence.
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