[ 
https://issues.apache.org/jira/browse/FLINK-36155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Keith Lee updated FLINK-36155:
------------------------------
    Description: 
The following warning logs are seen from kinesis connector indicating 

```
LEAK: ByteBuf.release() was not called before it's garbage-collected. See 
https://netty.io/wiki/reference-counted-objects.html for more information.
Recent access records: 
Created at:
  
org.apache.flink.kinesis.shaded.io.netty.buffer.UnpooledByteBufAllocator.newDirectBuffer(UnpooledByteBufAllocator.java:96)
  
org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:188)
  
org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:179)
  
org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.buffer(AbstractByteBufAllocator.java:116)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.expandCumulation(ByteToMessageDecoder.java:560)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder$1.cumulate(ByteToMessageDecoder.java:103)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:288)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
  
org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1373)
  
org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1236)
  
org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1285)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
  
org.apache.flink.kinesis.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
  
org.apache.flink.kinesis.shaded.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
  
org.apache.flink.kinesis.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
  
org.apache.flink.kinesis.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
  
java.base/java.lang.Thread.run(Thread.java:829)","messageSchemaVersion":"1","messageType":"ERROR","threadName":"aws-java-sdk-NettyEventLoop-111-12
```

  was:
```
LEAK: ByteBuf.release() was not called before it's garbage-collected. See 
https://netty.io/wiki/reference-counted-objects.html for more information.
Recent access records: 
Created at:
  
org.apache.flink.kinesis.shaded.io.netty.buffer.UnpooledByteBufAllocator.newDirectBuffer(UnpooledByteBufAllocator.java:96)
  
org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:188)
  
org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:179)
  
org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.buffer(AbstractByteBufAllocator.java:116)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.expandCumulation(ByteToMessageDecoder.java:560)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder$1.cumulate(ByteToMessageDecoder.java:103)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:288)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
  
org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1373)
  
org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1236)
  
org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1285)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468)
  
org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
  
org.apache.flink.kinesis.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
  
org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
  
org.apache.flink.kinesis.shaded.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
  
org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
  
org.apache.flink.kinesis.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
  
org.apache.flink.kinesis.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
  
java.base/java.lang.Thread.run(Thread.java:829)","messageSchemaVersion":"1","messageType":"ERROR","threadName":"aws-java-sdk-NettyEventLoop-111-12
```


> ByteBuf.release() was not called before it's garbage-collected
> --------------------------------------------------------------
>
>                 Key: FLINK-36155
>                 URL: https://issues.apache.org/jira/browse/FLINK-36155
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / Kinesis
>    Affects Versions: aws-connector-4.2.0, 1.19.1
>            Reporter: Keith Lee
>            Priority: Major
>
> The following warning logs are seen from kinesis connector indicating 
> ```
> LEAK: ByteBuf.release() was not called before it's garbage-collected. See 
> https://netty.io/wiki/reference-counted-objects.html for more information.
> Recent access records: 
> Created at:
>   
> org.apache.flink.kinesis.shaded.io.netty.buffer.UnpooledByteBufAllocator.newDirectBuffer(UnpooledByteBufAllocator.java:96)
>   
> org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:188)
>   
> org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:179)
>   
> org.apache.flink.kinesis.shaded.io.netty.buffer.AbstractByteBufAllocator.buffer(AbstractByteBufAllocator.java:116)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.expandCumulation(ByteToMessageDecoder.java:560)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder$1.cumulate(ByteToMessageDecoder.java:103)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:288)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1373)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1236)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1285)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468)
>   
> org.apache.flink.kinesis.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
>   
> org.apache.flink.kinesis.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
>   
> org.apache.flink.kinesis.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
>   
> org.apache.flink.kinesis.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
>   
> java.base/java.lang.Thread.run(Thread.java:829)","messageSchemaVersion":"1","messageType":"ERROR","threadName":"aws-java-sdk-NettyEventLoop-111-12
> ```



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