Communication link failure java io eofexception underlying cause null

b) Mysql settings: This should be done in " my. ini" file under mysql folder. wait_ timeout = 1200 ( i. e 20 min – Keep same time of your firewall OR any other third. MySQL drops unused connections after a while because it assumes that the other side forgot to close it. What you need to do is to configure a check that Tomcat should apply before it reuses a pooled connection. I have a server with a JDBC mysql connection, but every morning I got this error when I check the server: java. SQLException: Communication link failure: java. EOFException, underlying cause: null. * * BEGIN NESTED. You can either create a new connection like you do everywhere else, or improve the encapsulation of getConnection( ). In other words, change getConnection( ) to return the static Connection stored in your class, on condition it is not null and. I think that this means that your servlet' s JDBC connection to the MySQL database has been closed. Your application needs to discard it and open a new one.

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  • Video:Underlying communication link

    Link eofexception communication

    TorqueException: com. CommunicationsException: Communications link failure due to underlying exception: * * BEGIN NESTED EXCEPTION * * java. STACKTRACE: java. If you don' t have your JDBC driver configured to reconnect on failure, then this error will not go away unless you open a new connection. If you are using a database connection pool ( you are using one, right? ), then you probably want to enable it' s. While I don' t have definitive solutions, it seems something is interfering communication between the app server. public static Connection getConnection( ) { if ( DatabaseConnnector. conn = = null) { initConn( ) ; } else { try. the MySQL connection expires after 8 hours. If you are timing out with multiple attempts tell c3p0 to rebuild/ refresh the connection pool. Losing the max_ idle_ time setting certainly seems like it would cause this municationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. In my case it was an idle timeout, that caused the connection to be dropped on the server. EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection.

    CommandLineJobRunner. main( CommandLineJobRunner. java: 525) Caused by:. CommunicationsException: Communications link failure The last packet successfully received from the.