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https://issues.apache.org/jira/browse/CASSANDRA-18602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17732996#comment-17732996
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Brandon Williams commented on CASSANDRA-18602:
----------------------------------------------

Without  a clear reproduction or more thorough information to determine a bug, 
I don't think there is anything actionable from a development standpoint here, 
and this jira is for the development of Apache Cassandra and thus makes a poor 
vehicle for support, which seems more appropriate for the position this is in.  
I recommend contacting the community for support on slack or the ML: 
https://cassandra.apache.org/_/community.html  If after that there is clear 
agency for development, please do come back with your supplemental findings.

>  UnknownColumnFamilyException reading from socket Error Post DB Version 
> Upgrade from 3.11.10 to 4.1.0
> -----------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-18602
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18602
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Aman Paliwal
>            Priority: Normal
>
> There is a three Node Apache Cassandra Cluster with version: 3.11.10 with 
> around 160GB data on each node and Keyspace RF is 3
> On Day1, On first Node, DB Version was Upgraded from 3.11.10 to 4.1.0 and 
> upgradesstables was run post start of db service from apache cassandra 4.1.0 
> binaries.
> On Day2, On Second Node, Post start of binaries from 4.1.0, On third node 
> which was with DB Version 3.11.10 below error was continuously observed.
> When cfId d46780c2-2f1c-3db9-b4c1-b8d9fbc0cc23 was checked it was of Table 
> system_auth.network_permissions
>  
> /*
> WARN  [MessagingService-Incoming-/10.x.135.y] 2023-06-10 03:11:37,632 
> IncomingTcpConnection.java:107 - UnknownColumnFamilyException reading from 
> socket; closing
> org.apache.cassandra.db.UnknownColumnFamilyException: Couldn't find table for 
> cfId d46780c2-2f1c-3db9-b4c1-b8d9fbc0cc23. If a table was just created, this 
> is likely due to the schema not being fully propagated.  Please wait for 
> schema agreement on table creation.
> WARN  [MessagingService-Incoming-/10.x.135.y] 2023-06-10 03:15:47,633 
> IncomingTcpConnection.java:107 - UnknownColumnFamilyException reading from 
> socket; closing
> org.apache.cassandra.db.UnknownColumnFamilyException: Couldn't find table for 
> cfId d46780c2-2f1c-3db9-b4c1-b8d9fbc0cc23. If a table was just created, this 
> is likely due to the schema not being fully propagated.  Please wait for 
> schema agreement on table creation.
> WARN  [MessagingService-Incoming-/10.x.135.y] 2023-06-10 03:19:57,638 
> IncomingTcpConnection.java:107 - UnknownColumnFamilyException reading from 
> socket; closing
> org.apache.cassandra.db.UnknownColumnFamilyException: Couldn't find table for 
> cfId d46780c2-2f1c-3db9-b4c1-b8d9fbc0cc23. If a table was just created, this 
> is likely due to the schema not being fully propagated.  Please wait for 
> schema agreement on table creation.
> WARN  [MessagingService-Incoming-/10.x.135.y] 2023-06-10 03:19:57,642 
> IncomingTcpConnection.java:107 - UnknownColumnFamilyException reading from 
> socket; closing
> org.apache.cassandra.db.UnknownColumnFamilyException: Couldn't find table for 
> cfId d46780c2-2f1c-3db9-b4c1-b8d9fbc0cc23. If a table was just created, this 
> is likely due to the schema not being fully propagated.  Please wait for 
> schema agreement on table creation.
> WARN  [MessagingService-Incoming-/10.x.135.y] 2023-06-10 03:28:17,643 
> IncomingTcpConnection.java:107 - UnknownColumnFamilyException reading from 
> socket; closing
> org.apache.cassandra.db.UnknownColumnFamilyException: Couldn't find table for 
> cfId d46780c2-2f1c-3db9-b4c1-b8d9fbc0cc23. If a table was just created, this 
> is likely due to the schema not being fully propagated.  Please wait for 
> schema agreement on table creation.
> WARN  [MessagingService-Incoming-/10.x.135.y] 2023-06-10 03:28:17,649 
> IncomingTcpConnection.java:107 - UnknownColumnFamilyException reading from 
> socket; closing
> */
>  



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