1. In Coprocessor-start, a call on env.getTable will lead to connection refused error.
To solve this, using HTable constructor HTable(configuration, tableName) instead, configuration is necessary since zookeeper port number is not consistant always.
Remember to call htable.close() after operation to salve resource.
2. look for the thread using port 60010
lsof | grep 60010
Then kill the thread
