Dana Powers created KAFKA-3160:
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Summary: Kafka LZ4 framing code miscalculates header checksum
Key: KAFKA-3160
URL: https://issues.apache.org/jira/browse/KAFKA-3160
Project: Kafka
Issue Type: Bug
Components: compression
Affects Versions: 0.9.0.0, 0.8.2.1, 0.8.2.0, 0.8.2.2
Reporter: Dana Powers
KAFKA-1493 implements the LZ4 framing specification, but it incorrectly
calculates the header checksum. Specifically, the current implementation
includes the 4-byte MagicNumber in the checksum, which is incorrect.
http://cyan4973.github.io/lz4/lz4_Frame_format.html
Third-party clients that attempt to use off-the-shelf lz4 framing find that
brokers reject messages as having a corrupt checksum. So currently non-java
clients must 'fixup' lz4 packets to deal with the broken checksum.
Magnus first identified this issue in librdkafka; kafka-python has the same
problem.
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