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Posted to commits@iggy.apache.org by "atharvalade (via GitHub)" <gi...@apache.org> on 2026/04/14 20:27:57 UTC
[I] go-sdk: DeserializeClient returns duplicate consumer groups [iggy]
atharvalade opened a new issue, #3131:
URL: https://github.com/apache/iggy/issues/3131
`DeserializeClient` pre-allocates with `make([]ConsumerGroupInfo, Count)` then uses `append`, resulting in leading zero-value entries followed by the real data. The outer `for position < length` loop can also re-read groups if there are trailing bytes.
**File:** `foreign/go/binary_serialization/binary_response_deserializer.go` lines 539-558
```go
consumerGroups := make([]iggcon.ConsumerGroupInfo, clientInfo.ConsumerGroupsCount)
// ...
for position < length {
for i := uint32(0); i < clientInfo.ConsumerGroupsCount; i++ {
// ...
consumerGroups = append(consumerGroups, consumerGroup)
position += 12
}
}
```
Client metadata always contains ConsumerGroupsCount extra zero-valued entries. If trailing bytes exist, groups are duplicated. Same bug exists in C# SDK (BinaryMapper.MapClient).
Gotta use make([], 0, Count) instead of make([], Count) and break after one pass through the inner loop.
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Re: [I] go-sdk: DeserializeClient returns duplicate consumer groups [iggy]
Posted by "atharvalade (via GitHub)" <gi...@apache.org>.
atharvalade commented on issue #3131:
URL: https://github.com/apache/iggy/issues/3131#issuecomment-4314343240
Please assign this to me
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Re: [I] go-sdk: DeserializeClient returns duplicate consumer groups [iggy]
Posted by "hubcio (via GitHub)" <gi...@apache.org>.
hubcio closed issue #3131: go-sdk: DeserializeClient returns duplicate consumer groups
URL: https://github.com/apache/iggy/issues/3131
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