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https://issues.apache.org/jira/browse/CASSANDRA-16940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17413173#comment-17413173
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Brad Schoening edited comment on CASSANDRA-16940 at 9/10/21, 1:29 PM:
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I agree its odd. During the time we were seeing this error, our code was able
to connect using the Java driver with protocol v3 explicitly defined in the
code and CQLSH 5.0 with v3 and v4 protocol – some nodes would negotiate down to
v3, most would use v4.
our logs also had these info messages:
2021-09-08 19:46:40,634 [INFO ] [main] cluster_id=29 ip_address=169.99.224.209
SystemKeyspace.java:891 - No version string found for /169.94.131.176
2021-09-08 19:46:40,634 [INFO ] [main] cluster_id=29 ip_address=169.99.224.209
SystemKeyspace.java:891 - No version string found for /169.94.131.174
2021-09-08 19:46:40,635 [INFO ] [main] cluster_id=29 ip_address=169.99.224.209
ConfiguredLimit.java:108 - Detected peers which do not fully support protocol
V4. Capping max negotiable version to V3
was (Author: bschoeni):
I agree its odd. During the time we were seeing this error, our code was able
to connect using the Java driver with protocol v3 explicitly defined in the
code and CQLSH 5.0 with v3 and v4 protocol – some nodes would negotiate down to
v3, most would use v4.
> Confusing ProtocolException msg Invalid or unsupported protocol version (4)
> ---------------------------------------------------------------------------
>
> Key: CASSANDRA-16940
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16940
> Project: Cassandra
> Issue Type: Bug
> Components: Messaging/Client
> Reporter: Brad Schoening
> Priority: Normal
>
> The following warning was seen frequently after upgrading from 3.0.15 to
> 3.11.11 in the cassandra.log:
> {noformat}
> ProtocolException: Invalid or unsupported protocol version (4); supported
> versions are (3/v3, 4/v4, 5/v5-beta){noformat}
> It is at best unclear, or maybe a bug in the code throwing this exception
> stating version '4' not supported but 4/v4 is.
> from org/apache/cassandra/transport/ProtocolVersion.java
> public static String invalidVersionMessage(int version)
> { return String.format("Invalid or unsupported protocol version (%d);
> supported versions are (%s)", version, String.join(", ",
> ProtocolVersion.supportedVersions())); }
> We later found invalid IP addresses in the system.peers table and once
> removed, this exception went away.
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