access violation when message send to wrong partition

[yakovale-flutterint]

Hi
I faced an issue when 3 things are happening:

1. i'm supplying headers for each message
2. i'm sending to non existing partition
3. before sending second message i'm waiting for CB to be triggered for first message

Please find a code sample that reproduce error below, it's a 'example_KafkaProducer_EnableManualEventsPoll.cc' from examples with small additions.

failing_example.txt

The result is when second send method is called, it fails in KafkaProducer.h #393 with error:
Exception thrown: read access violation
it was 0XFFFFFFFFFFFFFF

My environment is Windows 10 x64, VS 2019

Thanks in advance

[kenneth-jia]

Please be aware of the memory lifetime management, -- if you're not quite sure about it, just use SendOption::ToCopyRecordValue as the option for send(...)

[yakovale-flutterint]

i tried copy option too. Actually i just took example from this library and provided headers, no changes of example logics was done