syncProducer.SendMessage blocked infinitely at sending rsp to a nil channel

[shiml7]

Versions

Please specify real version numbers or git SHAs, not just "Latest" since that changes fairly regularly.

| Sarama | Kafka | Go |
|v1.32.0|-------|1.16|

Configuration

What configuration values are you using for Sarama and Kafka?
sync mod

Logs

the stack is like this：
Goroutine 1940490 - User: /usr/local/app/go/pkg/mod/github.com/!shopify/[email protected]/sync_producer.go:96 github.com/Shopify/sarama.(*syncProducer).SendMessage (0xb7d5c6)
0 0x000000000043ccc5 in runtime.gopark
at /usr/local/go/src/runtime/proc.go:337
1 0x000000000040854f in runtime.chanrecv
at /usr/local/go/src/runtime/chan.go:576
2 0x000000000040818b in runtime.chanrecv1
at /usr/local/go/src/runtime/chan.go:439
3 0x0000000000b7d5c6 in github.com/Shopify/sarama.(*syncProducer).SendMessage
at /usr/local/app/go/pkg/mod/github.com/!shopify/[email protected]/sync_producer.go:96
...

Goroutine 470 - User: /usr/local/app/go/pkg/mod/github.com/!shopify/[email protected]/sync_producer.go:132 github.com/Shopify/sarama.(*syncProducer).handleSuccesses (0xb7d910)
0 0x000000000043ccc5 in runtime.gopark
at /usr/local/go/src/runtime/proc.go:337
1 0x0000000000407aae in runtime.chansend
at /usr/local/go/src/runtime/chan.go:163
2 0x00000000004073d5 in runtime.chansend1
at /usr/local/go/src/runtime/chan.go:143
3 0x0000000000b7d910 in github.com/Shopify/sarama.(*syncProducer).handleSuccesses
at /usr/local/app/go/pkg/mod/github.com/!shopify/[email protected]/sync_producer.go:132
4 0x0000000000b87eb3 in github.com/Shopify/sarama.(*syncProducer).handleSuccesses-fm
at /usr/local/app/go/pkg/mod/github.com/!shopify/[email protected]/sync_producer.go:128
5 0x0000000000b7f2e9 in github.com/Shopify/sarama.withRecover
at /usr/local/app/go/pkg/mod/github.com/!shopify/[email protected]/utils.go:43
6 0x0000000000473f61 in runtime.goexit
at /usr/local/go/src/runtime/asm_amd64.s:1371

Problem Description

SendMessage blocked infinitely. The stack shows it seems blocked at goroutine 470 because it's chansending to a nil channel.
This problem occurs occasionally and the reproduce condition is not known yet。

[dnwe]

@shiml7 unfortunately this was a known issue with the v1.32.0 release and hence it was marked as retracted — please upgrade to the latest v1.34.0 release

[shiml7]

ok