I saw the following running Hoya functional test which involves LoadTestTool:
2014-01-16 19:06:03,443 [Thread-2] INFO client.HConnectionManager$HConnectionImplementation (HConnectionManager.java:makeStub(1572)) - getMaster attempt 8 of 35 failed; retrying after sleep of 10098, exception=org.apache.hadoop.hbase.MasterNotRunningException: The node /hbase is not in ZooKeeper. It should have been written by the master. Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
LoadTestTool was reading from correct zookeeper quorum but it wasn't able to find parent znode.
An option should be added to LoadTestTool so that user can specify parent znode in zookeeper.