Gatling Error with Netty Library CRC value missmatch

Gatling (Open-Source)
1

Hi,

I am getting a random error. This not happen every time, but It didn’t allow me to run properly.

This is the error:

10:09:10.841 [DEBUG] o.a.n.r.NettyRequestSender - CRC value missmatch. Expected: 2240407382, Got: 666479892
io.netty.handler.codec.compression.DecompressionException: CRC value missmatch. Expected: 2240407382, Got: 666479892
at io.netty.handler.codec.compression.JdkZlibDecoder.verifyCrc(JdkZlibDecoder.java:377)
at io.netty.handler.codec.compression.JdkZlibDecoder.readGZIPFooter(JdkZlibDecoder.java:355)
at io.netty.handler.codec.compression.JdkZlibDecoder.decode(JdkZlibDecoder.java:218)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:411)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:343)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:336)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1294)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:343)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:911)
at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:227)
at io.netty.handler.codec.http.HttpContentDecoder.decode(HttpContentDecoder.java:231)
at io.netty.handler.codec.http.HttpContentDecoder.decodeContent(HttpContentDecoder.java:153)
at io.netty.handler.codec.http.HttpContentDecoder.decode(HttpContentDecoder.java:145)
at io.netty.handler.codec.http.HttpContentDecoder.decode(HttpContentDecoder.java:46)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:88)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:343)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:336)
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:435)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267)
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:250)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:343)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:336)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1294)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:343)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:911)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:643)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:566)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:480)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:442)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131)
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
at java.lang.Thread.run(Thread.java:745)
10:09:10.843 [DEBUG] o.a.n.c.NettyConnectListener - Using new Channel ‘[id: 0xe4aef738, L:/10.0.111.59:59709 - R:…MYURL…]’ for ‘POST’ to ‘…MYURL…’
10:09:10.844 [DEBUG] i.g.h.a.AsyncHandler - Request ‘GET Index’ failed for user 9

This is the first time that I am seeing this.

If anyone has seen before, could help to see what is the problem?

2

On of the differences between deflate and gzip is that gzip includes a checksum that the user agent must validate.
The failure here is that the checksum check fails.
The only time I saw this error was with content that was stored pre-compressed on the server and whose checksum was indeed invalid.