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https://issues.apache.org/jira/browse/CASSANDRA-15804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Semb Wever updated CASSANDRA-15804:
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Fix Version/s: (was: 3.11.x)
> system_schema keyspace complain of schema mismatch during upgrade
> -----------------------------------------------------------------
>
> Key: CASSANDRA-15804
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15804
> Project: Cassandra
> Issue Type: Bug
> Components: Cluster/Schema
> Reporter: Pedro Gordo
> Priority: Low
> Fix For: 3.11.12, 4.0.x
>
>
> When upgrading from 3.11.4 to 3.11.6, we got the following error:
> {code:Plain Text}
> ERROR [MessagingService-Incoming-/10.20.11.59] 2020-05-07 13:53:52,627
> CassandraDaemon.java:228 - Exception in thread
> Thread[MessagingService-Incoming-/10.20.11.59,5,main]
> java.lang.RuntimeException: Unknown column kind during deserialization
> at
> org.apache.cassandra.db.Columns$Serializer.deserialize(Columns.java:464)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.db.SerializationHeader$Serializer.deserializeForMessaging(SerializationHeader.java:419)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.db.rows.UnfilteredRowIteratorSerializer.deserializeHeader(UnfilteredRowIteratorSerializer.java:195)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.db.partitions.PartitionUpdate$PartitionUpdateSerializer.deserialize30(PartitionUpdate.java:851)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.db.partitions.PartitionUpdate$PartitionUpdateSerializer.deserialize(PartitionUpdate.java:839)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.db.Mutation$MutationSerializer.deserialize(Mutation.java:425)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.db.Mutation$MutationSerializer.deserialize(Mutation.java:434)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.service.MigrationManager$MigrationsSerializer.deserialize(MigrationManager.java:675)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.service.MigrationManager$MigrationsSerializer.deserialize(MigrationManager.java:658)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at org.apache.cassandra.net.MessageIn.read(MessageIn.java:123)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.net.IncomingTcpConnection.receiveMessage(IncomingTcpConnection.java:192)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.net.IncomingTcpConnection.receiveMessages(IncomingTcpConnection.java:180)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> at
> org.apache.cassandra.net.IncomingTcpConnection.run(IncomingTcpConnection.java:94)
> ~[apache-cassandra-3.11.4.jar:3.11.4]
> {code}
> I've noticed that system_schema.dropped_columns has a new column called
> "kind".
> No issues arise from this error message, and the error disappeared after
> upgrading all nodes. But it still caused concerns due to the ERROR logging
> level, although "nodetool describecluster" reported only one schema version.
> It makes sense for the system keyspaces to not be included for the
> "describecluster" schema version check, but it seems to me that these
> internal schema mismatches should be ignored if the versions are different
> between the nodes.
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