DeploymentException: expected one strategy tag

[zerosleep]

Just downloaded the CVS head of JBoss 3 Beta 2 and now my app (which previously deployed fine on the alpha) generates this error several times:

nested throwable is: org.jboss.deployment.DeploymentException: expected one strategy tag

11:56:46,893 ERROR [EntityContainer] Exception in service lifecyle operation: create
org.jboss.deployment.DeploymentException: expected one strategy tag
at org.jboss.metadata.MetaData.getUniqueChild(MetaData.java:95)
at org.jboss.metadata.MetaData.getUniqueChildContent(MetaData.java:202)
at org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCReadAheadMetaData.(JDBCReadAheadMetaData.java:109)
at org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCEntityMetaData.(JDBCEntityMetaData.java:512)
at org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCApplicationMetaData.(JDBCApplicationMetaData.java:282)
at org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCXmlFileLoader.load(JDBCXmlFileLoader.java:75)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.loadJDBCEntityMetaData(JDBCStoreManager.java:502)
at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.create(JDBCStoreManager.java:265)
at org.jboss.ejb.plugins.CMPPersistenceManager.create(CMPPersistenceManager.java:134)
at org.jboss.ejb.EntityContainer.create(EntityContainer.java:329)
at org.jboss.ejb.Container.invoke(Container.java:723)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1003)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1555)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:720)
at $Proxy0.create(Unknown Source)
at org.jboss.system.ServiceController.create(ServiceController.java:248)
at java.lang.reflect.Method.invoke(Native Method)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1628)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
at org.jboss.util.jmx.MBeanProxy.invoke(MBeanProxy.java:73)
at $Proxy3.create(Unknown Source)
at org.jboss.ejb.EjbModule.createService(EjbModule.java:297)
at org.jboss.system.ServiceMBeanSupport.create(ServiceMBeanSupport.java:134)
at java.lang.reflect.Method.invoke(Native Method)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1628)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:720)
at $Proxy0.create(Unknown Source)
at org.jboss.system.ServiceController.create(ServiceController.java:248)
at java.lang.reflect.Method.invoke(Native Method)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1628)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
at org.jboss.util.jmx.MBeanProxy.invoke(MBeanProxy.java:73)
at $Proxy3.create(Unknown Source)
at org.jboss.ejb.EJBDeployer.create(EJBDeployer.java:397)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:585)
at org.jboss.deployment.MainDeployer.create(MainDeployer.java:579)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:481)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:454)
at java.lang.reflect.Method.invoke(Native Method)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1628)
at com.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1523)
at org.jboss.util.jmx.MBeanProxy.invoke(MBeanProxy.java:73)
at $Proxy2.deploy(Unknown Source)
at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:295)
at org.jboss.deployment.scanner.URLDeploymentScanner.scanDirectory(URLDeploymentScanner.java:466)
at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:356)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.loop(AbstractDeploymentScanner.java:190)
at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.run(AbstractDeploymentScanner.java:179)

What is this? Where would one put a 'strategy tag'?

[adrian.brock]

You probably want to read this.

http://main.jboss.org/thread.jsp?forum=66&thread=9744&message=485456

Regards,
Adrian

[zerosleep]

I would have found this if the damn forum search didn't crap out on me several times.

Thanks.

[tschampel]

I still can't get the CMP2.0 example to deploy correctly b\c I get the expected one strategy tag error when trying to user MS SQL Server 2000. Any ideas.

[ejbayswim]

As it turns out according to...
http://iris.cs.byu.edu/tim/462/tutorial/tutorial.html

One thing to note if you get an xml parser error in deployment that says that one strategy tag is required, make sure that you define a read-ahead tag with a strategy tag as shown. A read-ahead tag with only true or false as values is no longer acceptable.

So replace <read-ahead>true</read-ahead> in jbosscmp-jdbc.xml with...
<read-ahead>
<strategy>on-load</strategy>
<page-size>500</page-size>
<eager-load-group>group name</eager-load-group>
</read-ahead>

Once you fix that, you'll need to change
FROM Order o to FROM Order as o
and
o.status to o.orderStatus

and finally...
add <![CDATA[ ... ]]> around all the statements in the <ejb-ql> tags.

I tried to fined the email addres of the author of the CMP book but it wasn't in the book. Maybe (s)he'll see this and fix the problem in the example before someone else wasts hours debugging the same problem.

Now if I can just get it to pass the JUnit tests...