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From "Edgar Vonk (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-1975) Connection timed out IO Exceptions
Date Wed, 18 Feb 2009 15:59:01 GMT

    [ https://issues.apache.org/jira/browse/JCR-1975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12674668#action_12674668

Edgar Vonk commented on JCR-1975:

Thanks Jukka. 

Is the automatic reconnect done by Jackrabbit or is it handled by the connection pool? I was
looking at http://confluence.atlassian.com/display/JIRA/Surviving+Connection+Closures and
it seems that you need to add a 'validationQuery' parameter to the datasource in order to
get this to work? 

Adding the database connection parameters in the workspace configurations is problematic because
they are generated by Magnolia and there are quite a lot of them. Also, it would make maintenance
of our environments hard because we have different databases for every Magnolia server in
our hosting infrastructure. I was wondering why you think that adding the database connection
parameters in the workspace.xml's would make a difference in this case?

I do have a feeling that this whole issue is somehow caused by the usage of JNDI but I am
not sure how..

> Connection timed out IO Exceptions
> ----------------------------------
>                 Key: JCR-1975
>                 URL: https://issues.apache.org/jira/browse/JCR-1975
>             Project: Jackrabbit Content Repository
>          Issue Type: Bug
>          Components: jackrabbit-core
>    Affects Versions: core 1.4.5
>         Environment: Linux (CentOs), Oracle XE 10g, Tomcat 6, JDK 1.6, Magnolia Enterprise
3.6.3, JNDI
>            Reporter: Edgar Vonk
>         Attachments: jackrabbit_ioexceptionlog.txt
> We are running Jackrabbit 1.4.5 as part of the Magnolia Enterprise CMS. We are running
into Jackrabbit - database connection problems on some occasions. We do not understand why
and when these happen. When they do all we can do is restart Tomcat (with Magnolia) and then
everything seems to run fine again until the next time this happens.
> We have looked into this issue together with Magnolia but have so far failed to come
up with a solution. We have not even been able to reproduce the issue. It only happens on
our production environment (where we have the database server on a separate machine from our
two app servers).
> I have also reported this issue on the Magnolia form: http://www.nabble.com/Using-Oracle-with-a-JNDI-datasource-in-Tomcat-td21114284.html
> We are using a JNDI persistence manager set-up. Our Jackrabbit persistence manager configuration
looks as follows:
> {code}
> <PersistenceManager class="org.apache.jackrabbit.core.persistence.bundle.OraclePersistenceManager">
>   <param name="driver" value="javax.naming.InitialContext" />
>   <param name="url" value="java:comp/env/jdbc/magnolia" />
>   <param name="schemaObjectPrefix" value="${wsp.name}_" />
>   <param name="externalBLOBs" value="false" />
> </PersistenceManager>
> {code}
> Our datasource in Tomcat:
> {code}
> 	<Resource 
> 		name="jdbc/magnolia" 
> 		auth="Container" 
> 		type="javax.sql.DataSource"
> 		driverClassName="oracle.jdbc.OracleDriver" 
> 		url="jdbc:oracle:thin:@//CHANGEME:1521/XEXDB"
> 		username="CHANGEME" 
> 		password="CHANGEME" 
> 		maxActive="20" 
> 		maxIdle="10" 
> 		maxWait="-1" />
> {code}
> In the log files we see:
> java.sql.SQLRecoverableException: Io exception: Connection timed out
> I will upload the full log file excerpt. 

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