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https://issues.apache.org/jira/browse/HADOOP-13363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15368893#comment-15368893
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Tsuyoshi Ozawa commented on HADOOP-13363:
-----------------------------------------
>From CHANGES.txt: https://github.com/google/protobuf/blob/master/CHANGES.txt
{quote}
2.6.1
Java
* Updated DynamicMessage.setField() to handle repeated enum values
correctly.
* Fixed a bug that caused NullPointerException to be thrown when
converting manually constructed FileDescriptorProto to
FileDescriptor.
{quote}
{quote}
2.6.0
General
General
* Added oneofs(unions) feature. Fields in the same oneof will share
memory and at most one field can be set at the same time. Use the
oneof keyword to define a oneof like:
{code}
message SampleMessage {
oneof test_oneof {
string name = 4;
YourMessage sub_message = 9;
}
}
{code}
* Files, services, enums, messages, methods and enum values can be marked
as deprecated now.
* Added Support for list values, including lists of messages, when
parsing text-formatted protos in C++ and Java.
For example: foo: [1, 2, 3]
...
Java
* writeTo() method in ByteString can now write a substring to an
output stream. Added endWith() method for ByteString.
* ByteString and ByteBuffer are now supported in CodedInputStream
and CodedOutputStream.
* java_generate_equals_and_hash can now be used with the LITE_RUNTIME.
{quote}
> Upgrade protobuf from 2.5.0 to something newer
> ----------------------------------------------
>
> Key: HADOOP-13363
> URL: https://issues.apache.org/jira/browse/HADOOP-13363
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build
> Affects Versions: 3.0.0-alpha1
> Reporter: Allen Wittenauer
>
> Standard protobuf 2.5.0 does not work properly on many platforms. (See, for
> example, https://gist.github.com/BennettSmith/7111094 ). In order for us to
> avoid crazy work arounds in the build environment and the fact that 2.5.0 is
> starting to slowly disappear as a standard install-able package for even
> Linux/x86, we need to either upgrade or self bundle or something else.
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