codelipenghui commented on code in PR #20948:
URL: https://github.com/apache/pulsar/pull/20948#discussion_r1310413137
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pulsar-client/src/main/java/org/apache/pulsar/client/impl/ConsumerImpl.java:
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@@ -1459,6 +1460,29 @@ private ByteBuf processMessageChunk(ByteBuf
compressedPayload, MessageMetadata m
// discard message if chunk is out-of-order
if (chunkedMsgCtx == null || chunkedMsgCtx.chunkedMsgBuffer == null
|| msgMetadata.getChunkId() !=
(chunkedMsgCtx.lastChunkedMessageId + 1)) {
+ // Filter and ack duplicated chunks instead of discard ctx.
+ // For example:
+ // Chunk-1 sequence ID: 0, chunk ID: 0, msgID: 1:1
+ // Chunk-2 sequence ID: 0, chunk ID: 1, msgID: 1:2
+ // Chunk-3 sequence ID: 0, chunk ID: 2, msgID: 1:3
+ // Chunk-4 sequence ID: 0, chunk ID: 1, msgID: 1:4
+ // Chunk-5 sequence ID: 0, chunk ID: 2, msgID: 1:5
+ // Chunk-6 sequence ID: 0, chunk ID: 3, msgID: 1:6
+ // We should filter and ack chunk-4 and chunk-5.
Review Comment:
For the compatibility(The old producer still has the wrong behavior). At
least we should filter out unsealed chunks with the chunk IDs.
For your example, chunk-2 and chunk-3 should be filtered out.
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