Caused by: java.io.EOFException: Can not read response from server.-优快云博客

本文探讨了在数据库连接过程中遇到的问题，特别是无法从服务器获取响应的情况，并提供了详细的错误描述和原因分析。通过检查数据库连接状态，确保正常连接，可以有效解决此类问题。

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1、错误描述

The last packet successfully received from the server was 76,997 milliseconds ago.  The last packet sent successfully to the server was 78,995 

milliseconds ago.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
	at com.mysql.jdbc.MysqlIO.nextRowFast(MysqlIO.java:2144)
	at com.mysql.jdbc.MysqlIO.nextRow(MysqlIO.java:1900)
	at com.mysql.jdbc.MysqlIO.readSingleRowSet(MysqlIO.java:3401)
	at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:483)
	at com.mysql.jdbc.MysqlIO.readResultsForQueryOrUpdate(MysqlIO.java:3096)
	at com.mysql.jdbc.MysqlIO.readAllResults(MysqlIO.java:2266)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2687)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2719)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2318)
	at sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.logicalcobwebs.proxool.ProxyStatement.invoke(ProxyStatement.java:100)
	at org.logicalcobwebs.proxool.ProxyStatement.intercept(ProxyStatement.java:57)
	at $java.sql.Wrapper$$EnhancerByProxool$$8d43c634.executeQuery(<generated>)
	at base.dao.impl.BaseDaoImpl$2.execute(BaseDaoImpl.java:185)
	at base.dao.impl.BaseDaoImpl$2.execute(BaseDaoImpl.java:1)
	at org.hibernate.jdbc.WorkExecutor.executeReturningWork(WorkExecutor.java:72)
	at org.hibernate.internal.SessionImpl$3.accept(SessionImpl.java:2052)
	at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.coordinateWork(JdbcCoordinatorImpl.java:313)
	... 82 more
Caused by: java.io.EOFException: Can not read response from server. Expected to read 5 bytes, read 3 bytes before connection was unexpectedly 

lost.
	at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3017)
	at com.mysql.jdbc.MysqlIO.nextRowFast(MysqlIO.java:2125)
	... 102 more

2、错误原因

错误提示：不能从服务器获取响应，即因为某种原因导致数据库服务器连接失败

3、解决办法

检查数据库连接情况，确保正常连接