Druid.Xin

Results 4 issues of Druid.Xin

exception fixed : https://issues.apache.org/jira/browse/RANGER-3255

**Description** there exists a potential NPE in issue [ranger-980] **JIRA** https://issues.apache.org/jira/browse/RANGER-3232

Hi, is there any way to limit the speed of events? My APP sync mysql events realtime from backup db. But there is some peeks, which means high cpu and...

This program need gdb or lldb.