Colin Patrick McCabe created HADOOP-8620:
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             Summary: Add -Drequire.fuse and -Drequire.snappy
                 Key: HADOOP-8620
                 URL: https://issues.apache.org/jira/browse/HADOOP-8620
             Project: Hadoop Common
          Issue Type: Improvement
          Components: build
    Affects Versions: 2.0.1-alpha
            Reporter: Colin Patrick McCabe
            Assignee: Colin Patrick McCabe
            Priority: Minor


We have some optional build components which don't get built if they are not 
installed on the build machine.  One of those components is fuse_dfs.  Another 
is the snappy support in libhadoop.so.

Unfortunately, since these components are silently ignored if they are not 
present, it's easy to unintentionally create an incomplete build.

We should add two flags, -Drequire.fuse and -Drequire.snappy, that do exactly 
what the names suggest.  This will make the build more repeatable.  Those who 
want a complete build can specify these system properties to maven.  If the 
build cannot be created as requested, it will be a hard error.

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