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From "Binglin Chang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-4046) ChecksumTypeProto use NULL as enum value which is illegal in C/C++
Date Fri, 12 Oct 2012 16:29:03 GMT
Binglin Chang created HDFS-4046:

             Summary: ChecksumTypeProto use NULL as enum value which is illegal in C/C++
                 Key: HDFS-4046
                 URL: https://issues.apache.org/jira/browse/HDFS-4046
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Binglin Chang
            Priority: Minor

I tried to write a native hdfs client using protobuf based protocol, when I generate c++ code
using hdfs.proto, the generated file can not compile, because NULL is an already defined macro.
I am thinking two solutions:
1. refactor all DataChecksum.Type.NULL references to NONE, which should be fine for all languages,
but this may breaking compatibility.
2. only change protobuf definition ChecksumTypeProto.NULL to NONE, and use enum integer value(DataChecksum.Type.id)
to convert between ChecksumTypeProto and DataChecksum.Type, and make sure enum integer values
are match(currently already match).
I can make a patch for solution 2.

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