]
Stuart Douglas commented on WFLY-2680:
--------------------------------------
The reason why this does not work is because java:comp is scoped to a component, and when
dealing with persistence.xml there is no component.
We can probably just hack something in to make this work though, as it would be more user
friendly.
java:comp/DefaultDataSource doesn't work in persistence.xml
-----------------------------------------------------------
Key: WFLY-2680
URL:
https://issues.jboss.org/browse/WFLY-2680
Project: WildFly
Issue Type: Feature Request
Security Level: Public(Everyone can see)
Components: EE, JPA / Hibernate
Affects Versions: 8.0.0.CR1
Reporter: arjan tijms
Assignee: David Lloyd
Labels: javaee7, jdbc
Having a persistence.xml with the following content fails the deployment on WildFly 8
CR1:
{code:xml}
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
xmlns="http://xmlns.jcp.org/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence
http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="testPU">
<jta-data-source>java:comp/DefaultDataSource</jta-data-source>
</persistence-unit>
</persistence>
{code}
It results in the following error:
{noformat}
13:51:40,367 ERROR [org.jboss.as.controller.management-operation]
(DeploymentScanner-threads - 2) JBAS014613: Operation ("deploy") failed -
address: ([("deployment" => "dynamic-named-query.war")]) - failure
description: {"JBAS014771: Services with missing/unavailable dependencies" =>
["jboss.persistenceunit.\"dynamic-named-query.war#testPU\".__FIRST_PHASE__
is missing
[jboss.naming.context.java.module.dynamic-named-query.dynamic-named-query.DefaultDataSource]"]}
{noformat}
When I proposed the feature for the default data source over at the Java EE JIRA
(
https://java.net/jira/browse/JAVAEE_SPEC-4) I intended this to work. In the description I
hinted that the standard JNDI name would be the standard alternative for
{{java:jboss/datasources/ExampleDS}} on JBoss. The latter indeed does work in
{{persistence.xml}} using WildFly 8 CR1.
Omitting the {{jta-data-source}} element altogether *does* work, which is great. However,
I foresee a lot of users tripping over this in the future and just giving up the idea of
using a default data source, especially since the error message is very cryptic for new
developers.
In GlassFish 4 using {{java:comp/DefaultDataSource}} in {{persistence.xml}} does work.
See also WFLY-2027 and WFLY-2158
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