MySql Communications link failure, when connecting to MySQL

0
votes

I have developed a applicaion in java which uses Hibernate and mysql as backend.This applicaion runs at every night 12.00 AM. The application works fine, but some time it shows,

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 59,390,356 milliseconds ago. The last packet sent successfully to the server was 1 milliseconds ago. at sun.reflect.GeneratedConstructorAccessor66.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:409) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1118) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3055) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2941) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3489) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2113) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2113) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2275) at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:56) ... 19 more Caused by: java.net.SocketException: Software caused connection abort: recv failed at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(Unknown Source) at java.net.SocketInputStream.read(Unknown Source) at com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114) at com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161) at com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189) at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2499) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2952) ... 27 more

I have connectd my application by using IP,

192.168.0.25:3306/dbname?user=root&password=password

Myapplication and mysql runs on the same machine only.

I have checked many forum but i cant get clear idea, any one suggest me the correct way to solve this issue.

1
javahibernatejdbc
Did you check if mysql service is running? – user2575725
@Arvind yes mysql service is running. – PS Kumar
May be MySql is running out-of max no. of connections with your app. – user2575725
@Arvind If i use max no. of connection means, then how it works on mean times. I have placed some scheduler, that trigger myapplication every day night. it works fine fron Mon-Fri day. But saterday it shows that type of error. – PS Kumar
may be you should put a schedule for sat to test mysql with logs enabled. – user2575725

1 Answers

0
votes

Means your database has not started. If you are using WAMP or similar server for mysql then start these server then your my sql will start