Adam Holmberg created CASSANDRA-8487:
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             Summary: system.schema_columns sometimes missing for 'system' 
keyspace
                 Key: CASSANDRA-8487
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8487
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Adam Holmberg
            Priority: Minor


Occasionally a Cassandra node will have missing schema_columns information 
where keyspace_name='system'.

{code}
cqlsh> select * from system.schema_columns where keyspace_name='system';

 keyspace_name | columnfamily_name | column_name
---------------+-------------------+-------------

(0 rows)
{code}

All keyspace and column family schema info is present for 'system' -- it's only 
the column information missing.

This can occur on an existing cluster following node restart. The data usually 
appears again after bouncing the node.

This is impactful to client drivers that expect column meta for configured 
tables.

Reproducible in 2.1.2. Have not seen it crop up in 2.0.11.



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