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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6161) fix HDFS protobuf namespace conflicts
Date Wed, 26 Mar 2014 19:13:14 GMT
Colin Patrick McCabe created HDFS-6161:

             Summary: fix HDFS protobuf namespace conflicts
                 Key: HDFS-6161
                 URL: https://issues.apache.org/jira/browse/HDFS-6161
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode, namenode
            Reporter: Colin Patrick McCabe
            Priority: Minor

HDFS currently puts multiple protobuf definitions with the same name in the same protobuf

For example, {{QJournalProtocol}} defines {{HeartbeatRequestProto}} in package {{hadoop.hdfs}},
but DatanodeProtocol also defines something different, also called {{HeartbeatRequestProto}}
and also in package {{hadoop.hdfs}}.

This isn't an issue in Java because the java PB compiler seems to disregard the PB namespaces,
putting the generated {{QJournalProtocolProtos.java}} file in package {{org.apache.hadoop.hdfs.qjournal.protocol}}
and the DN one in a different java namespace.  However, it is an issue when creating protobuf
bindings in other languages.

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