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https://issues.apache.org/jira/browse/HDDS-14673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18060170#comment-18060170
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Tsz-wo Sze commented on HDDS-14673:
-----------------------------------
[~russole], thanks for trying it!
bq. Protobuf-generated enums (e.g. HddsProtos.PipelineState) still
implement ProtocolMessageEnum. ...
Do you know how many such enums? We have different ways to fix the problems:
# If we could find out all the enums, we may add a codec for each enum.
# If we could not easily find out all the enums, we may add a codec at runtime
-- when a new enum is discovered at runtime, we add it to the factory. Then,
the codec will be available for the same enum.
> Check if ScmEnumCodec is needed.
> --------------------------------
>
> Key: HDDS-14673
> URL: https://issues.apache.org/jira/browse/HDDS-14673
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: SCM HA
> Reporter: Tsz-wo Sze
> Assignee: Chen-Jheng Sing
> Priority: Major
>
> Since we don't need a similar codec for
> org.apache.ratis.thirdparty.com.google.protobuf.ProtocolMessageEnum,
> I suspect that ScmEnumCodec is not used at all. We should try removing it
> from ScmCodecFactory.
> {code}
> +++
> b/hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/ha/io/ScmCodecFactory.java
> @@ -40,7 +40,6 @@ public final class ScmCodecFactory {
> static {
> codecs.put(com.google.protobuf.Message.class, new
> ScmNonShadedGeneratedMessageCodec());
> codecs.put(Message.class, new ScmGeneratedMessageCodec());
> - codecs.put(ProtocolMessageEnum.class, new ScmEnumCodec());
> codecs.put(List.class, new ScmListCodec());
> {code}
> If it is not used, just remove the entire ScmEnumCodec class. Otherwise, we
> may discuss how to avoid reflection.
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