kevindai0126

Merge two TDigests throws NullPointerException

1

Sometimes when I merged two tdigests by call the add method of one tdigest, it threw NullPointerException as follows: java.lang.NullPointerException at com.clearspring.analytics.stream.quantile.GroupTree.add(GroupTree.java:85) at com.clearspring.analytics.stream.quantile.GroupTree.add(GroupTree.java:79) at com.clearspring.analytics.stream.quantile.GroupTree.add(GroupTree.java:79) at com.clearspring.analytics.stream.quantile.GroupTree.add(GroupTree.java:79) at com.clearspring.analytics.stream.quantile.GroupTree.add(GroupTree.java:79)...