今天我打開自己的應用程序，卻收到了一條來自MySQL的錯誤提示，提示我應用程序無法啟動，讓我很是困惑。

Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
	at com.mysql.jdbc.Util.getInstance(Util.java:387)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919)
	at com.mysql.jdbc.	SQLError.createSQLException(SQLError.java:898)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:887)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:861)
	at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2164)
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2089)
	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:806)
	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328)
	at java.sql.DriverManager.getConnection(DriverManager.java:664)
	at java.sql.DriverManager.getConnection(DriverManager.java:247)
	at App.Connector.createConnection(Connector.java:14)
	at App.Main.main(Main.java:7)
Caused by: java.lang.NullPointerException
	at com.mysql.jdbc.StreamingResultSet.rowDataPacket(StreamingResultSet.java:1946)
	at com.mysql.jdbc.StreamingResultSet.buildCachedRows(StreamingResultSet.java:811)
	at com.mysql.jdbc.StreamingResultSet.populate(StreamingResultSet.java:697)
	at com.mysql.jdbc.StreamingResultSet.<init>(StreamingResultSet.java:476)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2522)
	at com.mysql.jdbc.ConnectionImpl.setReadOnlyInternal(ConnectionImpl.java:4854)
	at com.mysql.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:2109)
	... 15 more

在經過一番搜索之后，我發現這個問題的原因可能是由于MySQL的連接出現問題導致的。因此，我檢查了我的MySQL數據庫并發現它已經在我的電腦上停止提供服務。

為了解決這個問題，我必須重新啟動MySQL服務。經過一番嘗試后，我終于成功地啟動了MySQL服務，并重新啟動了我的應用程序，一切恢復了正常。