[logback-user] jndi db access in tomcat5.5

Anton Tagunov anton.tagunov at umail.ru
Tue Jul 15 00:05:49 CEST 2008

Hello Diego,


> using tomcat5.5, username/password can't be specified when 
> trying to use a JNDI-shared DataSource
> when using pooled data sources the user and 
> password version of getConnection method can't be used.
> I don't know if this is tomcat-specific behaviour.

this is indeed an iteresting question;
do we have anybody here with a better knowledge of J2EE?

> ... in ... ch.qos.logback.core.db.JNDIConnectionSource:
> Maybe some sort of "if jndi then don't use user/pass" testing could be done 
> for better error reporting

I guess if the answer to prev. question is positive this could be a worthy idea


> Added to that, the JNDI name used in the "jndiLocation" must be 
> prepended by "java:comp/env", as this is the standard context for java 
> objects and the JNDIConnectionSource does not prepend the searched values with it.

Looks like a nice idea to me.
Will not be backwards compatible but logback is not version 1 yet.
I suggest that you create a Jira item for this /and maybe attach a patch/


> Another thing I got problems with was slf4j's jcl-over-slf4j-1.5.2.jar. 
> logback ... initialized too early when using jcl-over-slf4j, before tomcat 
> makes the JNDI resources available to the web application

> ch.qos.logback.core.db.JNDIConnectionSource at 67c1a6 - Error while getting 
> data source javax.naming.NameNotFoundException:
> javax.naming.NameNotFoundException: 'comp' can't be found in this context
>         at org.apache.naming.NamingContext.lookup(NamingContext.java:770)
> org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
> org.apache.commons.logging.LogFactory.getLog(LogFactory.java:704)
> org.apache.catalina.core.ContainerBase.getLogger(ContainerBase.java:381)
> org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)

Looks pretty weird to me. Diego what folder is jcl-over-slf4j-1.5.2.jar in?
Do you have another copy in shared tomcat libraries? Or together with tomcat own jars?

Cheers, Anton Tagunov
logback user

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