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CloseWebSocketFrame LEAK when channel is already closed

See original GitHub issue

EDIT: After some debugging, I was able to figure out why this happens. This seems to be because an exception is thrown in the outgoing path (causing the memory leak). https://github.com/netty/netty/blob/33de96f4487c594c243cfc138be4592a51651451/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketServerProtocolHandler.java#L237-L244

Perhaps we need to check if the channel is active or not before retaining or releasing if an exception is thrown here: https://github.com/netty/netty/blob/e5951d46fc89db507ba7d2968d2ede26378f0b04/codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketServerHandshaker.java#L354-L357

Expected behavior

No leak

Actual behavior

[ERROR] 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: 
#1:
    io.netty.buffer.DefaultByteBufHolder.release(DefaultByteBufHolder.java:115)
   io.netty.util.ReferenceCountUtil.release(ReferenceCountUtil.java:88)
       io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:90)
        io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
    io.netty.handler.codec.http.websocketx.Utf8FrameValidator.channelRead(Utf8FrameValidator.java:82)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
       io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:321)
 io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:295)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1484)
       io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1245)
  io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
       io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
  io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
      io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
   io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
        io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
      io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
      io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
       io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
       io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
     io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
      java.base/java.lang.Thread.run(Thread.java:834)
#2:
       io.netty.buffer.DefaultByteBufHolder.retain(DefaultByteBufHolder.java:91)
  io.netty.handler.codec.http.websocketx.WebSocketFrame.retain(WebSocketFrame.java:88)
       io.netty.handler.codec.http.websocketx.CloseWebSocketFrame.retain(CloseWebSocketFrame.java:183)
  io.netty.handler.codec.http.websocketx.CloseWebSocketFrame.retain(CloseWebSocketFrame.java:26)
     io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler.decode(WebSocketServerProtocolHandler.java:239)
      io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler.decode(WebSocketServerProtocolHandler.java:53)
       io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:88)
        io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
    io.netty.handler.codec.http.websocketx.Utf8FrameValidator.channelRead(Utf8FrameValidator.java:82)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
       io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:321)
 io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:295)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1484)
       io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1245)
  io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
       io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
  io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
      io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
   io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
      io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
       io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
       io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
       io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
     io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
      java.base/java.lang.Thread.run(Thread.java:834)
#3:
Hint: 'websocketServer' will handle the message from this point.
      io.netty.buffer.DefaultByteBufHolder.touch(DefaultByteBufHolder.java:109)
     io.netty.handler.codec.http.websocketx.WebSocketFrame.touch(WebSocketFrame.java:106)
       io.netty.handler.codec.http.websocketx.CloseWebSocketFrame.touch(CloseWebSocketFrame.java:201)
     io.netty.handler.codec.http.websocketx.CloseWebSocketFrame.touch(CloseWebSocketFrame.java:26)
      io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:116)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
    io.netty.handler.codec.http.websocketx.Utf8FrameValidator.channelRead(Utf8FrameValidator.java:82)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
       io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:321)
 io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:295)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1484)
       io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1245)
  io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
       io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
  io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
      io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
   io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
        io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
      io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
       io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
       io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
       io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
     io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
      java.base/java.lang.Thread.run(Thread.java:834)
#4:
       Hint: 'io.netty.handler.codec.http.websocketx.Utf8FrameValidator' will handle the message from this point.
 io.netty.buffer.DefaultByteBufHolder.touch(DefaultByteBufHolder.java:109)
  io.netty.handler.codec.http.websocketx.WebSocketFrame.touch(WebSocketFrame.java:106)
       io.netty.handler.codec.http.websocketx.CloseWebSocketFrame.touch(CloseWebSocketFrame.java:201)
     io.netty.handler.codec.http.websocketx.CloseWebSocketFrame.touch(CloseWebSocketFrame.java:26)
      io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:116)
    io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
    io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
       io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:321)
 io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:295)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1484)
       io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1245)
  io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
       io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
  io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
      io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
   io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
        io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
      io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
       io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
       io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
       io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
     io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
      java.base/java.lang.Thread.run(Thread.java:834)
#5:
       Hint: 'io.netty.handler.codec.http.websocketx.extensions.compression.PerMessageDeflateDecoder' will handle the message from this point.
    io.netty.buffer.DefaultByteBufHolder.touch(DefaultByteBufHolder.java:109)
  io.netty.handler.codec.http.websocketx.WebSocketFrame.touch(WebSocketFrame.java:106)
       io.netty.handler.codec.http.websocketx.CloseWebSocketFrame.touch(CloseWebSocketFrame.java:201)
     io.netty.handler.codec.http.websocketx.CloseWebSocketFrame.touch(CloseWebSocketFrame.java:26)
      io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:116)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:321)
 io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:295)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
    io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1484)
       io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1245)
       io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
  io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
  io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
      io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
  io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
    io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
      io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
       io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
       io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
       io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
 io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
  java.base/java.lang.Thread.run(Thread.java:834)
Created at:
       io.netty.buffer.PooledByteBufAllocator.newDirectBuffer(PooledByteBufAllocator.java:363)
    io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:187)
   io.netty.buffer.AbstractByteBufAllocator.directBuffer(AbstractByteBufAllocator.java:178)
   io.netty.buffer.AbstractByteBufAllocator.buffer(AbstractByteBufAllocator.java:115)
 io.netty.buffer.ByteBufUtil.readBytes(ByteBufUtil.java:446)
   io.netty.handler.codec.http.websocketx.WebSocket08FrameDecoder.decode(WebSocket08FrameDecoder.java:314)
    io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
  io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
      io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
 io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1484)
   io.netty.handler.ssl.SslHandler.decodeNonJdkCompatible(SslHandler.java:1245)
       io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1282)
       io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:498)
  io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:437)
   io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276)
     io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
     io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
  io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
   io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
   io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
   io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
        io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
      io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
  io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
  io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
      io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
  io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
      java.base/java.lang.Thread.run(Thread.java:834)
: 2 leak records were discarded because the leak record count is targeted to 4. Use system property io.netty.leakDetection.targetRecords to increase the limit.
(thread: nioEventLoopGroup-4-1)
(logger: io.netty.util.ResourceLeakDetector)

Steps to reproduce

  1. Connect to WebSocket server
  2. Send message
  3. Disconnect
  4. Run GC

Minimal yet complete reproducer code (or URL to code)

https://github.com/svaithia/NettyWebSocket/tree/main/src/main/java/com/netty

Netty version

4.1.46

JVM version (e.g. java -version)

openjdk version "11.0.7" 2020-04-14
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.7+10)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.7+10, mixed mode)

OS version (e.g. uname -a)

x86_64 GNU/Linux

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Comments:11 (7 by maintainers)

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1reaction
amizurovcommented, Apr 21, 2021
1reaction
normanmaurercommented, Apr 20, 2021
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