I try to move from mysql-java-client to mariadb-java-client. I use HikariCP pool and I use default MySQL configuration provide from HikariCP website.
If I use default mysql client, works fine, but with mariadb I need to remove this params:
<!-- Works with both clients -->
<property name="hibernate.connection.provider_class">com.zaxxer.hikari.hibernate.HikariConnectionProvider</property>
<!-- Works with mysql-java-client, not with mariadb-java-client -->
<property name="hibernate.hikari.dataSource.cachePrepStmts">true</property>
<property name="hibernate.hikari.dataSource.prepStmtCacheSize">250</property>
<property name="hibernate.hikari.dataSource.prepStmtCacheSqlLimit">2048</property>
<property name="hibernate.hikari.dataSource.useServerPrepStmts">true</property>
I don't known if I need to specified these params or are optional.
Unfortunately, not currently supported by the MariaDB JDBC driver.
Related
I am using aurora mysql db. I am using mariadb connector j with hibernate.
I am using "org.mariadb.jdbc.Driver".I want to set following properties of this driver using hibernate cfg file.
set read only on connetion so that it will fetch data from read replica.
pooling mechanism of mariadb driver(minPoolSize , maxPoolSize etc.)
hibernte.cfg.xml
<hibernate-configuration>
<session-factory>
<!-- SQL Dialect -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
<!-- Database Connection Settings -->
<property name="hibernate.connection.driver_class">org.mariadb.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql:aurora://xxxxx:3306/dbname</property>
<property name="hibernate.connection.username">xxxxx</property>
<property name="hibernate.connection.password">xxxxx</property>
<property name="hibernate.connection.assureReadOnly">true</property>
<property name="hibernate.connection.autoReconnect">true</property>
<property name="hibernate.connection.autocommit">false</property>
<property name="hibernate.connection.maxPoolSize">5</property>
<property name="hibernate.connection.minPoolSize">2</property>
<property name="hibernate.connection.poolName">MyConnectionPool</property>
<property name="hibernate.connection.pool">true</property>
<property name="hibernate.connection.maxIdleTime">7000</property>
<property name="show_sql">true</property>
<!-- Specifying Session Context -->
<property name="hibernate.current_session_context_class">org.hibernate.context.internal.ThreadLocalSessionContext</property>
<!-- Mapping With Model Class Containing Annotations -->
<mapping class="com.xxx.aurora.beans.xxx" />
<mapping class="com.xxx.aurora.beans.User" />
</session-factory>
</hibernate-configuration>
I am able to connect with aurora mysql, but not able to set the connection on readonly. My requirement is that I want to create the connection with read-only replica for read queries using single cluster end point.
I am taking reference form mariadb-connector-j
I am also wondering that can I use the maria db connection pool with hibernate, if yes then how?
Change these Lines
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
<property name="hibernate.connection.url">jdbc:mysql:aurora://xxxxx:3306/dbname</property>
to
<property name="dialect">org.hibernate.dialect.MariaDBDialect</property>
<property name="connection.url">jdbc:mariadb://xxxxxx:3306/dbname</property>
How do I see MySql connection URL from openshift? I need it to use it in hibernate.cfg.xml
When I log onto my account online I only see the username and password.
On open shift the database is already available in JNDI. It's name is jdbc/MySQLDS.
To use this 'datasource' in hibernate, your hibernate.cfg.xml should look something like this:
<!-- Database connection settings -->
<property name="hibernate.connection.datasource">java:comp/env/jdbc/MySQLDB</property>
<!-- SQL dialect -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Mapped annotated entity-->
<mapping class="org.hibernate.tutorial.domain.Event"/>
</session-factory>
To help you even mote please tell us if you are using JbossEWS 1.0, 2.0, JBoss AS6, JBoss EAP. Is your app scale, etcetera.
I am using Hibernate c3p0 configuration for connection pooling.
some times my appliaction has exhausted, is there any problem with my code. can any one please help me."my code is like this".
'
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">100</property>
<property name="hibernate.c3p0.timeout">1800</property>
<property name="hibernate.c3p0.max_statements">20</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>
<property name="connection.provider_class">
org.hibernate.connection.C3P0ConnectionProvider
</property>'
You may have a Connection leak. Please consider trying c3p0 config parameters unreturnedConnectionTimeout and debugUnreturnedConnectionStackTraces. See the discussion here.
I am a beginer with visual studio 2008 (C#), mysql and NHibernate.
I have problems with mysql connector as I don't know how to add reference to it.
In my project I have:
/lib/mysql-connector-net-6.1.4-src/
(downloaded from http://dev.mysql.com/downloads/mirror.php?id=387799#mirrors)
Now I right click on my project -> addReference -> browse -> What now?
Should I also edit my hibernate configuration?
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<session-factory>
<property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
<property name="connection.driver_class">NHibernate.Driver.MySqlDataDriver</property>
<property name="connection.connection_string">Server=localhost;database=Pets;Database=pets,User ID=root,Password=;</property>
<property name="dialect">NHibernate.Dialect.MySQL5Dialect</property>
<property name="proxyfactory.factory_class"> NHibernate.ByteCode.LinFu.ProxyFactoryFactory, NHibernate.ByteCode.LinFu </property>
<property name="show_sql">false</property>
</session-factory>
</hibernate-configuration>
Thanks
You need to add a reference to the MySQL connector DLL that corresponds to the version of .NET you are targeting.
From the link provided, it seems like you downloaded the source code for the MySQL connector, so you'll either need to build this code and take the desired DLL out of the /bin folder afterwards or download a full installer (which will include the binaries) from the second link here:
http://dev.mysql.com/downloads/connector/net/6.1.html
Once you add this DLL to your project, you'll need to edit that NHibernate configuration to update the "connection.connection_string" property with the connection string for your database.
Hope this helps. There is some more documentation available here:
http://dev.mysql.com/doc/refman/5.1/en/connector-net.html
MySQL seems to have an 8 hour time out on its connections. I'm running multiple WARs in Tomcat utilizing Hibernate for ORM. After 8 hours (i.e. overnight), I get broken pipes when it picks up an idle connection.
I've already traced through the code and made doubly sure I commit or rollback all transactions.
Here is my hibernate.cfg.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
<property name="hibernate.connection.password"></property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/test</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
<property name="hibernate.current_session_context_class">thread</property>
<!--property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property-->
<property name="c3p0.min_size">3</property>
<property name="c3p0.max_size">5</property>
<property name="c3p0.timeout">1800</property>
<property name="c3p0.preferredTestQuery">SELECT 1</property>
<property name="c3p0.testConnectionOnCheckout">true</property>
<property name="c3p0.idle_test_period">100</property> <!-- seconds -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<property name="cache.use_query_cache">false</property>
<property name="cache.use_minimal_puts">false</property>
<property name="max_fetch_depth">10</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- classes removed -->
</session-factory>
The parameter I thought would have fixed it was the c3p0.idle_test_period -- It defaults to 0. However, we still have the Broken Pipe issue after 8 hours of running. While there are multiple posts index via Google, none arrive at a satisfactory answer.
So it turns out I was missing a key line that enabled c3p0 (the c3p0 parameters I was tweaking were having no effect because Hibernate was using it's built in connection pool -- which it appropriately warns is not suitable for production). In hibernate 2.x, setting the hibernate.c3p0.max_size property enabled c3p0 connection pooling. However, in 3.x you must specify the following property --
<property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
Additionally, here are my final configuration parameters --
<property name="hibernate.c3p0.min_size">3</property>
<property name="hibernate.c3p0.max_size">5</property>
<property name="hibernate.c3p0.timeout">1800</property>
<property name="hibernate.c3p0.idle_test_period">100</property> <!-- seconds -->
It's rather unfortunate that both Hibernate and c3p0 have abysmal documentation in this regard.
There are two things going on here. You should read this article for more details, but the take-aways are:
You can adjust the MySQL wait_timeout setting to something larger than 8 hours, if desired.
The Hibernate settings should include "hibernate." before the "c3p0", e.g. hibernate.c3p0.idle_test_period instead of just c3p0.idle_test_period
This is a solution when you have a broken pipe because of combination of tomcat's wait_timeout=28800 sec(8h) and maxIdleTime=0 in c3p0:
I've changed the local tomcat wait_timeout via my.ini file to 120sec (2 min). And I placed the following:
maxIdleTime=100
idleConnectionTestPeriod=0 (same as default/as if it didn't exist)
other:
acquireIncrement=2
minPoolSize=2
maxPoolSize=5
maxIdleTimeExcessConnections=10
I had no problems with this setup.
I didn't need to use idleConnectionTestPeriod!
If tomcat's wait_timeout is 28800 sec, and maxIdleTime is 25200, it means that c3p0 will close the idle connection in 3600sec (1h) earlier, before tomcat throws a "broken pipe" exception. Isn't that right?!
As you can see I have no issues with providing only maxIdleTime.
Unfortunately, these:
maxIdleTime
idleConnectionTestPeriod
configuring_connection_testing
testConnectionOnCheckin
don't explain too much the corner cases.
And, btw, here is how to open the tomcat's my.ini file with Notepad++:
http://drupal.org/node/32715#comment-4907440
Cheers,
Despot
I've several problem -
- C3P0ConnectionProvider was not found
- I solve it by using the hibernate c3p0 version
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.5.6-Final</version>
</dependency>
<!-- c3p0 -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>3.3.1.GA</version>
</dependency>
- I have that wait_timeout issue on mysql. First I set /etc/my.cnf wait_timeout=10
then I changed the Idle time out value to lower than the wait_timeout value which < 10
That solved my problem.
<property name="hibernate.connection.provider_class" value="org.hibernate.connection.C3P0ConnectionProvider" /> <property name="hibernate.c3p0.acquire_increment" value="1" />
<property name="hibernate.c3p0.idle_test_period" value="28690"/>
<property name="hibernate.c3p0.timeout" value="1800" />
<property name="hibernate.c3p0.max_size" value="5" />
<property name="hibernate.c3p0.min_size" value="3" />
<property name="hibernate.c3p0.max_statement" value="50" />
<property name="hibernate.c3p0.preferredTestQuery" value="select 1;"/>
I was getting the same problem and it took time to figure out the solution.
I use Hibernate 4.0.1 and mysql 5.1(no spring framework) and I was facing the issue. First make sure that you configured the c3p0 jars properly which are essential.
I used these properties in hibernate.cfg.xml
<property name="hibernate.c3p0.validate">true</property>
<property name="hibernate.connection.provider_class">org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.preferredTestQuery">SELECT 1;</property>
<property name="hibernate.c3p0.testConnectionOnCheckout">true</property>
<property name="hibernate.c3p0.idle_test_period">10</property>
<property name="hibernate.c3p0.acquireRetryAttempts">5</property>
<property name="hibernate.c3p0.acquireRetryDelay">200</property>
<property name="hibernate.c3p0.timeout">40</property>
But it's of no use 'cause C3p0 was still taking the default properties not the properties which I set in hibernate.cfg.xml, You can check it in logs. So, I searched many websites for right solution and finally I came up with this. remove the C3p0 properties in cfg.xml and create c3p0-config.xml in the root path(along with cfg.xml) and set properties as follows.
<c3p0-config>
<default-config>
<property name="automaticTestTable">con_test</property>
<property name="checkoutTimeout">40</property>
<property name="idleConnectionTestPeriod">10</property>
<property name="initialPoolSize">10</property>
<property name="maxPoolSize">20</property>
<property name="minPoolSize">5</property>
<property name="maxStatements">50</property>
<property name="preferredTestQuery">SELECT 1;</property>
<property name="acquireRetryAttempts">5</property>
<property name="acquireRetryDelay">200</property>
<property name="maxIdleTime">30</property>
</default-config>
</c3p0-config>
but if you run, ORM takes the jdbc connection but not C3p0 connection pool 'cause we should add these properties in hibernate.cfg.xml
<property name="hibernate.c3p0.validate">true</property>
<property name="hibernate.connection.provider_class">org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider</property>
now everything works fine(At least it worked fine for me) and the issue is solved.
check the following for references.
http://www.mchange.com/projects/c3p0/index.html#configuring_connection_testing
https://community.jboss.org/wiki/HowToConfigureTheC3P0ConnectionPool
I hope this solves your problem.