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https://issues.apache.org/jira/browse/CASSANDRA-3450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lanny Ripple updated CASSANDRA-3450:
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    Description: 
In {{ColumnFamilyRecordReader}} {{computeNext()}} calls {{maybeInit()}} and 
then if {{rows}} is not null it is indexed into.  {{maybeInit()}} could fetch 
new data, determine the associated slice predicate is empty, and end up 
removing all the rows if all columns turned out to be empty.  There is no check 
for {{rows.isEmpty()}} after the possible removal of all rows.



  was:
In {{ColumnFamilyRecordReder}} {{computeNext()}} calls {{maybeInit()}} and then 
if {{rows}} is not null it is indexed into.  {{maybeInit()}} could fetch new 
data, determine the associated slice predicate is empty, and end up removing 
all the rows if all columns turned out to be empty.  There is no check for 
{{rows.isEmpty()}} after the possible removal of all rows.



    
> maybeInit in ColumnFamilyRecordReader can cause rows to be empty but not null
> -----------------------------------------------------------------------------
>
>                 Key: CASSANDRA-3450
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3450
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Hadoop
>    Affects Versions: 1.0.1
>            Reporter: Lanny Ripple
>            Priority: Minor
>
> In {{ColumnFamilyRecordReader}} {{computeNext()}} calls {{maybeInit()}} and 
> then if {{rows}} is not null it is indexed into.  {{maybeInit()}} could fetch 
> new data, determine the associated slice predicate is empty, and end up 
> removing all the rows if all columns turned out to be empty.  There is no 
> check for {{rows.isEmpty()}} after the possible removal of all rows.

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