Pedro Gordo created CASSANDRA-15804:
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Summary: 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
Reporter: Pedro Gordo
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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