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https://issues.apache.org/jira/browse/KAFKA-20302?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Edoardo Comar updated KAFKA-20302:
----------------------------------
    Description: 
If the configuration entry`queued.max.request.bytes` is set ,

network receives buffer are allocated from a 
SimpleMemoryPool
 
if an exception is thrown in 
SocketServer.Processor.processCompletedReceives()
e.g. an 
InvalidRequestException or UnsupportedVersionException
in parseRequestHeader()

for a request that requires delayed allocation, 
the buffer is never released.

*Eventually the memory pool is depleted and the broker no longer processes any 
request*

  was:
If the configuration entry`queued.max.request.bytes` is set ,

network receives buffer are allocated from a 
SimpleMemoryPool
 
if an exception is thrown in 
SocketServer.Processor.processCompletedReceives()
e.g. an 
InvalidRequestException or UnsupportedVersionException
in parseRequestHeader()

for a request that requires delayed allocation, 
the buffer is never released.

Eventually the memory pool is depleted and the broker no longer processes any 
request


> Receive buffers allocated from MemoryPool may not be released if request is 
> invalid
> -----------------------------------------------------------------------------------
>
>                 Key: KAFKA-20302
>                 URL: https://issues.apache.org/jira/browse/KAFKA-20302
>             Project: Kafka
>          Issue Type: Bug
>          Components: network
>    Affects Versions: 3.9.2, 4.2.0, 4.3.0, 4.1.1
>            Reporter: Edoardo Comar
>            Assignee: Edoardo Comar
>            Priority: Critical
>
> If the configuration entry`queued.max.request.bytes` is set ,
> network receives buffer are allocated from a 
> SimpleMemoryPool
>  
> if an exception is thrown in 
> SocketServer.Processor.processCompletedReceives()
> e.g. an 
> InvalidRequestException or UnsupportedVersionException
> in parseRequestHeader()
> for a request that requires delayed allocation, 
> the buffer is never released.
> *Eventually the memory pool is depleted and the broker no longer processes 
> any request*



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