I ran into a problem where addsplits was hanging forever and no errors were printed by Accumulo even when I set the log level to trace. I finally figured out the problem was that I had the wrong version of thrift on the classpath (0.9.1 vs 0.9.3). Accumulo 1.8.1 was trying to use a method that did not exist in thrift 0.9.1
This missing method caused a NoSuchMethodError to be thrown. The Accumulo split code only caught Exception and therefore did not handle this. Also nothing was printed for this.
The split code should be fixed to not silently drop errors.