gnodet commented on code in PR #736:
URL: https://github.com/apache/maven/pull/736#discussion_r872493501
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maven-core/src/main/java/org/apache/maven/lifecycle/internal/MojoExecutor.java:
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@@ -232,7 +237,17 @@ private static class ProjectLock implements AutoCloseable
boolean aggregator = mojoDescriptor.isAggregator();
acquiredAggregatorLock = aggregator ?
aggregatorLock.writeLock() : aggregatorLock.readLock();
acquiredProjectLock = getProjectLock( session );
- acquiredAggregatorLock.lock();
+ if ( !acquiredAggregatorLock.tryLock() )
+ {
+ for ( String s : MessageHelper.formatWarning(
+ "An aggregator Mojo is already executing in
parallel build, but aggregator "
+ + "Mojos require exclusive access to
reactor to prevent race conditions. This "
+ + "mojo execution will be blocked until
the aggregator work is done." ) )
+ {
Review Comment:
Right, I'll dig it.
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