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From "Chris Lockfort (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-8695) thrift column definition list sometimes immutable
Date Wed, 28 Jan 2015 00:56:34 GMT
Chris Lockfort created CASSANDRA-8695:
-----------------------------------------

             Summary: thrift column definition list sometimes immutable
                 Key: CASSANDRA-8695
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8695
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Chris Lockfort


When the input cf_def.column_metadata is null, ColumnDefinition.fromThrift can return Collections.emptyList()
(which is defined to be an immutable list) 

One caller, CFMetaData.internalFromThrift , incorrectly assumes that this list will always
be mutable and tries to add to this immutable list, which causes the Cassandra server to throw
an exception.

It looks like this is a bug in 2.1, but not in trunk.
I can include my one-liner patch, but I'm not sure whether it is better to fix the caller
(to not assume random lists you get back from a method are mutable) or the callee (to always
return a mutable list).



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