java.lang.IllegalStateException: The iterator of a CMR collection may only be used within the transction in which it was created
at org.jboss.ejb.plugins.cmp.jdbc.bridge.RelationSet$1.verifyIteratorIsValid(RelationSet.java:309)
at org.jboss.ejb.plugins.cmp.jdbc.bridge.RelationSet$1.hasNext(RelationSet.java:269)
at com.ingenta.acs.core.ejb.IdentityBean.getPropertyMap(IdentityBean.java:286)
Using both JBoss 3.0.3 and 3.2.0RC3 on Solaris with Sun's JDK 1.3.1 or 1.4.1.
We have an Identity entity and an IdentityProperty entity with a 1-M CMR relationship. For convenince there's a method on the Identity bean that gets the related IdentityProperties, iterates through the CMR collection and puts the values in a Map:
public Map getPropertyMap()
{
Map result = new HashMap();
Set properties = getIdentityProperties();
for (Iterator i = properties.iterator(); i.hasNext(); )
{
IdentityPropertyLocal p = (IdentityPropertyLocal) i.next();
result.put(p.getName(), p.getValue());
}return result; }
This method is marked as transaction "Required" - the bean is marked "Supports" and the set* methods are marked "Mandatory".
In jboss.xml all get* methods have been declared read-only:
<entity> <ejb-name>Identity</ejb-name> <local-jndi-name>acs/core/Identity</local-jndi-name> <method-attributes> <method> <method-name>get*</method-name> <read-only>true</read-only> </method> </method-attributes> </entity>
When a single person is using the application this error never occurs, but when I start load testing this error keeps occurring with relatively low load. We could never use it in production with this number of errors.
This bean is queried every time a new user is authenticated, so it's a potential bottleneck - which is why it's been marked read-only for get*. Without being marked read-only everything gets very slow (starts to take about 20 seconds to authenticate a user and show our home page) and all the jbossweb threads (max 100) get used up.
When I originally tested (with JBoss 3.0.1 I think) a while ago this error was very rare, but with 3.0.3 and 3.2.0RC3 it's a lot more common (admittedly there have been application code changes since then).
Please help!
Thanks,
Andrew
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