grails oracle connection timeout

Question

I have below datasource config in grails.

dataSource_staging_oracle {
    dbCreate = "none"
    pooled = true
    url = "jdbc:oracle:thin:@//my-box-oracle.com:1521/DB1"
    driverClassName = "oracle.jdbc.OracleDriver"
    username = "USER_1"
    password = "encryptedpassword"
    passwordEncryptionCodec = PropertiesCodec
}
dataSource_prod_oracle {
    dbCreate = "none"
    pooled = true
    autoReconnect = true
    url = "jdbc:oracle:thin:@//my-oracle-prod-box.com:1521/DB2"
    driverClassName = "oracle.jdbc.OracleDriver"
    username = "user_2"
    password = "encrypted_password"
    passwordEncryptionCodec = PropertiesCodec
}

Application is able to fetch the DB connection and work fine. However after 1-2 hours of processing, I see connection closed exceptions.

 ERROR util.JDBCExceptionReporter  - Closed Connection

I believe this has to do with datasource config properties. What grails settings help me in refreshing the connections? I already have set autoReconnect and pooled to true

I use grails 2.3.3

Answer 1

Below config helped me fix my problem.

dataSource_staging {
            dbCreate = "none"
            pooled = true
            autoReconnect = true
            url = "jdbc:oracle:thin:@//my-box-oracle.com:1521/DB1"
            driverClassName = "oracle.jdbc.OracleDriver"
            username = "USER_1"
            password = "encryptedpassword"
            passwordEncryptionCodec = PropertiesCodec
            properties {
                validationQuery = "SELECT 1 FROM DUAL"
                testOnBorrow = true
                testWhileIdle = true
                testOnReturn = false
                timeBetweenEvictionRunsMillis = 5000
                minEvictableIdleTimeMillis = 60000
                maxAge = 10 * 60000
                maxWait = 10000
                maxIdle = 25
                maxActive = 50
                initialSize = 5
            }
        }