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reduce NPEs in CQE

This commit is contained in:
fjy 2013-12-16 14:27:01 -08:00
parent 84233238b1
commit 5ecd909f7c
1 changed files with 5 additions and 0 deletions
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5
processing/src/main/java/io/druid/query/ChainedExecutionQueryRunner.java
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@ -84,6 +84,11 @@ public class ChainedExecutionQueryRunner<T> implements QueryRunner<T>
{ {
final int priority = Integer.parseInt(query.getContextValue("priority", "0")); final int priority = Integer.parseInt(query.getContextValue("priority", "0"));
if (Iterables.isEmpty(queryables)) {
log.warn("No queryables found.");
return Sequences.empty();
}
return new BaseSequence<T, Iterator<T>>( return new BaseSequence<T, Iterator<T>>(
new BaseSequence.IteratorMaker<T, Iterator<T>>() new BaseSequence.IteratorMaker<T, Iterator<T>>()
{ {