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Posted to commits@cassandra.apache.org by "Yaniv Kaul (Jira)" <ji...@apache.org> on 2025/09/26 17:15:00 UTC
[jira] [Created] (CASSANDRA-20929) Protocol v5 spec is wrong - wrt compressed frame format
Yaniv Kaul created CASSANDRA-20929:
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Summary: Protocol v5 spec is wrong - wrt compressed frame format
Key: CASSANDRA-20929
URL: https://issues.apache.org/jira/browse/CASSANDRA-20929
Project: Apache Cassandra
Issue Type: Bug
Reporter: Yaniv Kaul
From [https://github.com/apache/cassandra/blob/e2d2e3b31ba47dfc9bbdbfdbcace3932fd3d32e7/doc/native_protocol_v5.spec#L137-L140] :
The variant with LZ4 compression uses an 8 byte header. The first 4 bytes contain
an unsigned integer (little endian) containing the compressed and uncompressed
lengths of the payload and the self contained flag.
But [https://github.com/apache/cassandra/blob/e2d2e3b31ba47dfc9bbdbfdbcace3932fd3d32e7/doc/native_protocol_v5.spec#L144-L146] says:
1. Compressed length (17 bits)
2. Uncompressed length (17 bits)
3. isSelfContained flag (1 bit)
17 + 17 + 1 is already 35 bytes - which is more than 'first 4 bytes'
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