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https://issues.apache.org/jira/browse/CASSANDRA-3390?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13134092#comment-13134092
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Jonathan Ellis commented on CASSANDRA-3390:
-------------------------------------------

bq. we may add a column between when we compute the serialized size and when we 
do the actual serialization

Right, I meant that if we were willing to drop the assert and allow the buffer 
to expand in the rare case of a race here.

I'll commit to 0.8 and 1.0.
                
> ReadResponseSerializer.serializedSize() calculation is wrong
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-3390
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3390
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.0.1
>            Reporter: Yang Yang
>            Assignee: Jonathan Ellis
>             Fix For: 1.0.1
>
>         Attachments: 3390.patch, 3390.txt
>
>
> in ReadResponse.java
> the following code
>     public long serializedSize(ReadResponse response, int version)
>     {
>         int size = DBConstants.intSize;
>         size += (response.isDigestQuery() ? response.digest() : 
> ByteBufferUtil.EMPTY_BYTE_BUFFER).remaining();
>         size += DBConstants.boolSize;
>         if (response.isDigestQuery())
>             size += response.digest().remaining();
>         else
>             size += Row.serializer().serializedSize(response.row(), version);
>         return size;
>     }
> adds the digest size 2 times
> this triggers assertion error in at least ReadVerbHandler

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