maybeInit in ColumnFamilyRecordReader can cause rows to be empty but not null
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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 {{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.
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