yifan-c commented on a change in pull request #868:
URL: https://github.com/apache/cassandra/pull/868#discussion_r565048721
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File path: src/java/org/apache/cassandra/net/Message.java
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@@ -757,7 +757,11 @@ private Header extractHeaderPost40(ByteBuffer buf,
InetAddressAndPort from, long
{
serializeHeaderPost40(message.header, out, version);
out.writeUnsignedVInt(message.payloadSize(version));
- message.verb().serializer().serialize(message.payload, out,
version);
+ IVersionedAsymmetricSerializer<T,T> payloadSerializer =
message.header.verb.serializer();
+ // per-response serializers are only required for in-jvm dtests
for message filtering
+ if (null == payloadSerializer)
+ payloadSerializer =
instance().callbacks.get(message.header.id,
message.header.from).responseVerb.serializer();
Review comment:
```suggestion
payloadSerializer =
instance().callbacks.responseSerializer(message.header.id, message.header.from);
// need to perform null check for the payloadSerializer
```
There is an existing API in `RequestCallbacks` that does the same thing.
The returned `serializer` could be null. Need to check. If null, it should
skip ser/deser. Same for the other methods changed in this PR.
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