java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at lab.ConnectionPool.getConnection(ConnectionPool.java:33)
at lab.LocalMySQLCP.pooling(LocalMySQLCP.java:97)
at lab.LocalMySQLCP.openDB(LocalMySQLCP.java:106)
at lab.LocalMySQLCP.(LocalMySQLCP.java:22)
at lab.LocalMySQLCP.main(LocalMySQLCP.java:53)

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