it fails when we issue the SegmentMetadataQuery by setting {"bySegment" : true} in context with exception -
java.lang.ClassCastException: io.druid.query.Result cannot be cast to io.druid.query.metadata.metadata.SegmentAnalysis
at io.druid.query.metadata.SegmentMetadataQueryQueryToolChest$4.compare(SegmentMetadataQueryQueryToolChest.java:222) ~[druid-processing-0.7.3-SNAPSHOT.jar:0.7.3-SNAPSHOT]
at com.google.common.collect.NullsFirstOrdering.compare(NullsFirstOrdering.java:44) ~[guava-16.0.1.jar:?]
at com.metamx.common.guava.MergeIterator$1.compare(MergeIterator.java:46) ~[java-util-0.27.0.jar:?]
at com.metamx.common.guava.MergeIterator$1.compare(MergeIterator.java:42) ~[java-util-0.27.0.jar:?]
at java.util.PriorityQueue.siftUpUsingComparator(PriorityQueue.java:649) ~[?:1.7.0_80]
which caused following regression
it fails when we issue the SegmentMetadataQuery by setting {"bySegment" : true} in context with exception -
java.lang.ClassCastException: io.druid.query.Result cannot be cast to io.druid.query.metadata.metadata.SegmentAnalysis
at io.druid.query.metadata.SegmentMetadataQueryQueryToolChest$4.compare(SegmentMetadataQueryQueryToolChest.java:222) ~[druid-processing-0.7.3-SNAPSHOT.jar:0.7.3-SNAPSHOT]
at com.google.common.collect.NullsFirstOrdering.compare(NullsFirstOrdering.java:44) ~[guava-16.0.1.jar:?]
at com.metamx.common.guava.MergeIterator$1.compare(MergeIterator.java:46) ~[java-util-0.27.0.jar:?]
at com.metamx.common.guava.MergeIterator$1.compare(MergeIterator.java:42) ~[java-util-0.27.0.jar:?]
at java.util.PriorityQueue.siftUpUsingComparator(PriorityQueue.java:649) ~[?:1.7.0_80]
that is if complex agg did not implement inputSizeFn() so
that segment metadata query shows atleast some information.
also instead of COMPLEX, return type of data stored.
* Add `invokeForeignLoader` to commonize the way tasks are attempted to be launched in a foreign class loader
* Add `buildClassLoader` to accomplish the common tasks for hadoop jobs when building a ClassLoader
renamed all [Max/Min]*.java to [DoubleMax/DoubleMin]*.java and created [Max/Min]AggregatorFactory.java which can be removed when we dont need the min/max aggregator type backward compatibility
