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LengthFieldBasedFrameDecoder fails with TooLongFrameException

See original GitHub issue

After upgrading netty to 4.1.45 LengthFieldBasedFrameDecoder fails to decode frame with TooLongFrameException (some integration tests in my project started to fail). Issue is not reproducible with 4.1.44.

LengthFieldBasedFrameDecoder extends ByteToMessageDecoder so I ended up blaming https://github.com/netty/netty/pull/9891. Internally it looks like LengthFieldBasedFrameDecoder#decode is invoked two times: first time when it receives 4 bytes of header (length of payload). Second - when it receives payload. The issue is with second invocation - first 4 bytes are missing, looks like ByteBuffer is not correctly merged.

Minimal yet complete reproducer code (or URL to code)

TODO

Netty version

Issue reproduces in netty 4.1.45 and later. 4.1.44 works fine.

JVM version (e.g. `java -version`)

OpenJDK 11.

OS version (e.g. `uname -a`)

Tested on Windows 10 / Centos 7.7.

Issue Analytics

State:
Created 4 years ago
Comments:7 (4 by maintainers)

Top GitHub Comments

1reaction

kshchepanovskyicommented, Mar 11, 2020

@normanmaurer Working on it.

1reaction

normanmaurercommented, Mar 10, 2020

@kshchepanovskyi can you provide a reproducer ?

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