Comments on: Automatic reconnect from Hibernate to MySQL http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/ Adrian Smith's blog Thu, 04 Mar 2010 04:38:33 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Tiko http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-8209 Tiko Wed, 02 Dec 2009 18:00:07 +0000 http://www.databasesandlife.com/?p=315#comment-8209 Thanks great post, save a lot of my time :))) Thanks great post, save a lot of my time :)))

]]> By: kuki http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-6182 kuki Mon, 10 Aug 2009 19:40:29 +0000 http://www.databasesandlife.com/?p=315#comment-6182 org.hibernate.connection.C3P0ConnectionProvider thx a lot :D org.hibernate.connection.C3P0ConnectionProvider
thx a lot :D

]]> By: Martin http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-5713 Martin Fri, 17 Jul 2009 12:51:36 +0000 http://www.databasesandlife.com/?p=315#comment-5713 Great help, thanks alot! Great help, thanks alot!

]]> By: Jyoti Ranjan Mishra http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-4367 Jyoti Ranjan Mishra Mon, 01 Jun 2009 08:33:56 +0000 http://www.databasesandlife.com/?p=315#comment-4367 Thanks Adrian. I am facing this problem and found no suitable way to solve. But yours solution, help me a great. Thanks Again Thanks Adrian.

I am facing this problem and found no suitable way to solve.

But yours solution, help me a great.

Thanks Again

]]> By: Lavanya http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-4198 Lavanya Wed, 27 May 2009 11:33:33 +0000 http://www.databasesandlife.com/?p=315#comment-4198 Hai, Iam also getting the same error. I configured my hibernate_conf.xml with these parameters: org.hibernate.connection.C3P0ConnectionProvider 100 1800 3600 as well as added c3p0-0.9.1.jar. Then also iam getting same error is coming if i run my application for morethan hours.. Can you please tell me is there anything i have to add to work if without exception. Thanks in Advance, Lavanya Hai,
Iam also getting the same error.
I configured my hibernate_conf.xml with these parameters:
org.hibernate.connection.C3P0ConnectionProvider
100
1800
3600

as well as added c3p0-0.9.1.jar.
Then also iam getting same error is coming if i run my application for morethan hours..
Can you please tell me is there anything i have to add to work if without exception.

Thanks in Advance,
Lavanya

]]> By: Felix http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-3296 Felix Thu, 30 Apr 2009 09:58:06 +0000 http://www.databasesandlife.com/?p=315#comment-3296 Thank you so much for sharing your insights! I was confused about whether the property names have to start with "hibernate." or not. It seems that if you configure Hibernate using JPA (typically in "persistence.xml"), property names have to include the "hibernate." prefix. If you use Hibernate's own configuration mechanism ("hibernate.xml"), you have to omit the prefix. A lot of sources do not recommend the use of c3p0.testConnectionOnCheckout or c3p0.validate but using c3p0.idle_test_period instead. Another good and short article about C3P0 configuration: http://blog.hpxn.net/2009/02/05/using-c3p0-and-hibernate-3/ This configuration seems to work fine in my Hibernate config file: <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property> <property name="c3p0.min_size">0</property> <property name="c3p0.max_size">30</property> <property name="c3p0.timeout">600</property> <property name="c3p0.max_statements">0</property> <property name="c3p0.acquire_increment">1</property> <property name="c3p0.idle_test_period">60</property> Additionally, I have set autoReconnect=true in my JDBC URL for MySQL (just to be safe). Thank you so much for sharing your insights!

I was confused about whether the property names have to start with “hibernate.” or not. It seems that if you configure Hibernate using JPA (typically in “persistence.xml”), property names have to include the “hibernate.” prefix. If you use Hibernate’s own configuration mechanism (“hibernate.xml”), you have to omit the prefix.

A lot of sources do not recommend the use of c3p0.testConnectionOnCheckout or c3p0.validate but using c3p0.idle_test_period instead.

Another good and short article about C3P0 configuration:
http://blog.hpxn.net/2009/02/05/using-c3p0-and-hibernate-3/

This configuration seems to work fine in my Hibernate config file:

<property name=”connection.provider_class”>org.hibernate.connection.C3P0ConnectionProvider</property>
<property name=”c3p0.min_size”>0</property>
<property name=”c3p0.max_size”>30</property>
<property name=”c3p0.timeout”>600</property>
<property name=”c3p0.max_statements”>0</property>
<property name=”c3p0.acquire_increment”>1</property>
<property name=”c3p0.idle_test_period”>60</property>

Additionally, I have set autoReconnect=true in my JDBC URL for MySQL (just to be safe).

]]> By: Marcin http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-3156 Marcin Sun, 26 Apr 2009 19:39:03 +0000 http://www.databasesandlife.com/?p=315#comment-3156 We use: <code>hibernate.c3p0.idle_test_period = 100</code> in <i>hibernate.properties</i> along with <code>c3p0.preferredTestQuery = SELECT 1;</code> in <i>c3p0.properties</i> and it works just fine. Regards, Marcin We use:
hibernate.c3p0.idle_test_period = 100
in hibernate.properties

along with
c3p0.preferredTestQuery = SELECT 1;
in c3p0.properties and it works just fine.

Regards,
Marcin

]]> By: Tim http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-3067 Tim Fri, 24 Apr 2009 14:04:56 +0000 http://www.databasesandlife.com/?p=315#comment-3067 Thanks a lot, saves me another afternoon of work! Great work. Thanks a lot, saves me another afternoon of work! Great work.

]]> By: Zac Morris http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-2336 Zac Morris Tue, 31 Mar 2009 16:30:08 +0000 http://www.databasesandlife.com/?p=315#comment-2336 Also, it looks like you can configure this directly in the hibernate.cfg.xml file via: <property name=”c3p0.validate”>true</property><!– Validate the connection on checkout –> Source: http://www.informit.com/articles/article.aspx?p=353736&seqNum=4 Also, it looks like you can configure this directly in the hibernate.cfg.xml file via:

<property name=”c3p0.validate”>true</property><!– Validate the connection on checkout –>

Source:
http://www.informit.com/articles/article.aspx?p=353736&seqNum=4

]]> By: Zac Morris http://www.databasesandlife.com/automatic-reconnect-from-hibernate-to-mysql/comment-page-1/#comment-2335 Zac Morris Tue, 31 Mar 2009 16:26:00 +0000 http://www.databasesandlife.com/?p=315#comment-2335 Also wanted to add to this dicussion with a great URL that I found that breaks down many of the C3P0 options: http://www.mchange.com/projects/c3p0/index.html Also wanted to add to this dicussion with a great URL that I found that breaks down many of the C3P0 options:

http://www.mchange.com/projects/c3p0/index.html

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