Cannot connect to database after server migration

[Ummul Syahmi Alias]

Dear all,

We have migrated our server from old rack to the new rack which the migration cause the change of IP
address. After migration, we 've run our web application and also another standalone application in the same server. The problem is both application can't communicate with the MySQL. They produced the errors as below. I wonder why because our system admin didn't do much changes . They just only move the server and change the IP. Both applications and MySQL is in the same server. Any ideas?


ERROR : java.sql.SQLException: Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream

** BEGIN NESTED EXCEPTION **

java.io.IOException
MESSAGE: Unexpected end of input stream

STACKTRACE:

java.io.IOException: Unexpected end of input stream
at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1073)
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:380)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:1511)
at com.mysql.jdbc.Connection.<init>(Connection.java:485)
at co m.mysql.jdbc.Driver.connect(Driver.java:341)
at java.sql.DriverManager.getConnection(DriverManager.java:512)
at java.sql.DriverManager.getConnection(DriverManager.java:193)
at mlt_webinterface.transTextNVEng.doGet(transTextNVEng.java:89)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)