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https://issues.apache.org/jira/browse/CASSANDRA-10608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14989298#comment-14989298
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Sylvain Lebresne commented on CASSANDRA-10608:
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Alright, last dtest run looks good (we have too much flapping dtests right now 
so comparison to the 3.0 branch are a bit difficult, but I did ran this once 
more [here|http://cassci.datastax.com/job/pcmanus-10608-dtest/2/] and it does 
look good). Committed, thanks.

> Adding a dynamic column to a compact storage table with the same name as the 
> partition key causes a memtable flush deadlock
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-10608
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10608
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Mike Adamson
>            Assignee: Mike Adamson
>            Priority: Minor
>             Fix For: 3.0.0
>
>         Attachments: 10608.txt
>
>
> The reproduction steps for this are as follows: 
> # Create the following schema:
> {noformat}
> CREATE KEYSPACE ks WITH replication = { 'class': 'SimpleStrategy', 
> 'replication_factor': '1'};
> CREATE TABLE ks.cf (k int, v int, PRIMARY KEY(k)) WITH COMPACT STORAGE;
> {noformat}
> # Using the thrift client execute the following:
> {noformat}
>         Column column = new Column(ByteBufferUtil.bytes("k"));
>         column.setValue(ByteBufferUtil.bytes(1));
>         column.setTimestamp(1);
>         client.insert(key, new ColumnParent(compactCf), column, 
> ConsistencyLevel.ONE);
> {noformat}
> This causes an invalid {{PartitionUpdate}} to be added to {{Memtable}} 
> containing a {{PartitionColumns}} containing the partition key 
> {{ColumnDefinition}}.
> This happens because {{LegacyLayout.decodeCellName}} does not check whether 
> the {{ColumnDefinition}} is a partition key 



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