Nested Throwables StackTrace:java.sql.SQLException: Unable to open a test connection to the given database. JDBC url = jdbc:mysql://192.168.1.148:3306/hive?createDatabaseIfNotExist=true, username = hadoop. Terminating connection pool (set lazyInit to true if you expect to start your database after your app). Original Exception: ------com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureThe last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)。。。Hadoop裝好了，沒問題，mysql也裝了，也沒出現問題，裝了hive后在命令行輸入hive就這樣了，困在這個地方整整一天了，求教！