Broken Pipe Exception on Grails App

Question

I developed an application on Grails 2.4.4 using jdk 1.7 and MySQL Workbench 6.3. It works for some time, but after some hours of the deployment i try to log in, it stops working and throws the exception "java.net.SocketException: Broken pipe".

2016-10-24 09:40:53,599 [http-nio-8080-exec-12] ERROR errors.GrailsExceptionResolver  - SocketException occurred when processing request: [POST] /login/autenticacao
Broken pipe. Stacktrace follows:
java.net.SocketException: Broken pipe
    at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
    at java.net.SocketOutputStream.write(SocketOutputStream.java:153)
    at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
    at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
    at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3832)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2471)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
    at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2322)
    at org.grails.datastore.gorm.GormStaticApi$_methodMissing_closure2.doCall(GormStaticApi.groovy:102)
    at sig.PasswordEncrypt.verificaAutenticacao(PasswordEncrypt.groovy:25)
    at sig.LoginController$_closure1.doCall(LoginController.groovy:20)
    at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:198)
    at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

I have an external file with the following configurations:

   beans{
    dataSource(BasicDataSource) {
        url = "jdbc:mysql://127.0.0.1/db_name?autoReconnect=true"
        username = "root"
        password = "root"
        pooled = true
        properties {
            jmxEnabled = true
            initialSize = 5
            maxActive = 50
            maxAge = 10 * 60000
            jdbcInterceptors = "ConnectionState"
            validationInterval = 15000
            minIdle = 5
            maxIdle = 25
            maxWaitMillis = 0
            timeBetweenEvictionRunsMillis = 1000 * 60 * 30
            numTestsPerEvictionRun = 3
            minEvictableIdleTimeMillis = 1000 * 60 * 30
            validationQuery = "SELECT 1"
            validationQueryTimeout = 3
            testOnBorrow = true
            testWhileIdle = true
            testOnReturn = true
            defaultTransactionIsolation = java.sql.Connection.TRANSACTION_READ_COMMITTED
        }
    }
}

I also added port:3306to my.cnf file and mysqld : ALL : ACCEPT to hosts.allow file on /etc folder.

Most of the properties were added after some research in another threads but it still doesnt work. Can anyone help me find a solution to solve this issue?

EDIT

After trying the solution given by Dipak Thoke it still throws the broken pipe exception. It also shows the following error

2016-10-25 09:03:33,683 [http-nio-8080-exec-37] ERROR spi.SqlExceptionHelper  - The last packet successfully received from the server was 38,766,997 milliseconds ago.  The last packet sent successfully to the server was 38,766,997 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.

Should i change the "wait_timeout" value? Cause i already have the "autoReconnect=true" property

Answer 1

You need to c3p0 your project

step :1

Add this "BuildConfig.groovy"

dependencies {
        // specify dependencies here under either 'build', 'compile'

        compile 'c3p0:c3p0:0.9.1.2'
    }

step 2:

Datasource groovy: Now your data source will be like this only remove the other things.

beans {
    dataSource(BasicDataSource) {
        **url = "jdbc:mysql://127.0.0.1/db_name"**
        driverClassName = "com.mysql.jdbc.Driver"
        username = "root"
        password = "root"
        pooled = true
   }
}

For more info

Do I need to use C3P0 pooling library in my (grails) web application?

How do I configure c3p0 for a grails 2.X application with multiple datasources?.

http://blog.nutpan.com/2013/07/grails-broken-pipe-and-cannot-release.html

Thanks

Answer 2

With the solutions that were presented here my application was always getting a broken pipe exception. I created a webservice with a script the runs every hour, that way the application never loses its connection to the database. Since then the exception was never been thrown again. Thank you all for your answers anyway :)