Bugs item #634910, was opened at 2002-11-07 13:03
Message generated for change (Settings changed) made by loubyansky
You can respond by visiting:
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Category: JBossCMP
Group: v3.0 Rabbit Hole
Status: Open
Resolution: None
Priority: 5
Submitted By: Alexei Yudichev (sflexus)
>Assigned to: Alexey Loubyansky (loubyansky)
Summary: arbitrary Exception: iterator of a CMR..
Initial Comment:
Jboss 3.0.4, CMP2.0 bean, simple business method is called by
remote client. Method declaration is:
public String
getSizeAsString(Locale locale) {
try {
int size = 0;
316:
for (Iterator i = getSlides().iterator(); i.hasNext(); )
{
size+=((Slide)i.next()).getSize();
}
size+=getXml(false,
false, -1, locale).toString().getBytes("UTF-8").length;
return
new
DecimalFormat("0.00").format((double)size/1024D);
}catch
(UnsupportedEncodingException ex) {
throw new
EJBException(ex);
}
}
>From time to time (not every
time, approx one time for 20 invocations) I get the exception below.
All transaction attributes for all beans in application declared
as:
<container-
transaction>
<method>
<description />
<ejb-
name>SMIL</ejb-name>
<method-name>*</method-
name>
</method>
<trans-attribute>Required</trans-
attribute>
</container-transaction>
Looks pretty
much like a bug with instable reproduce. I cannot provide a
testcase as well because it happens rarely. What can be the
cause? Can I help somehow else?
2002-11-05
17:54:20,987 ERROR [org.jboss.ejb.plugins.LogInterceptor]
RuntimeException:
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$1.hasNext(RelationSet.java:269)
at
com.tw.mms.ejb.SMILBean.getSizeAsString(SMILBean.java:316)
at
sun.reflect.GeneratedMethodAccessor75.invoke(Unknown
Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at
java.lang.reflect.Method.invoke(Method.java:324)
at
org.jboss.ejb.EntityContainer$ContainerInterceptor.invoke(EntityContainer.java:1194)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCRelationInterceptor.invoke(JDBCRelationInterceptor.java:95)
at
org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:297)
at
org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
at
org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInterceptor.java:90)
at
org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:163)
at
org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:107)
at
org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:69)
at
org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:107)
at
org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:178)
at
org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
at
org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
at
org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at
org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:493)
at
org.jboss.ejb.Container.invoke(Container.java:712)
at
org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1058)
at
org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at
org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:382)
at
sun.reflect.GeneratedMethodAccessor59.invoke(Unknown
Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at
java.lang.reflect.Method.invoke(Method.java:324)
at
sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
at
sun.rmi.transport.Transport$1.run(Transport.java:148)
at
java.security.AccessController.doPrivileged(Native
Method)
at
sun.rmi.transport.Transport.serviceCall(Transport.java:144)
at
sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at
java.lang.Thread.run(Thread.java:536)
----------------------------------------------------------------------
Comment By: Jernej Srebrnič (jernej4321)
Date: 2004-03-30 11:52
Message:
Logged In: YES
user_id=990160
I'm able to reproduce on 3.2.3 and 3.2.4RC1
we have bean A and bean B
1:N relation
CMP beans
metod:
col=A.getBs();
i=col.iterator();
foj(int j=0; j<col.size;j++){
i.next();
if(j==2) break;
}
steps (transaction mod is not relevant):
col this metod with the same data in paralel (2 or more
clients)
explanation:
if you do not iterate throw the entaire collection zou get
the exception. that's way the proposed workaround works (new
ArrayList(col) does the iteration).
hint to the problem:
beause its a cmb ration it is allways in a transaction,
transaction setings dont meter. the retrived beans are
locked... the itrated one are "marked" when iterating so at
the end of the transaction the are unlocked. the beans we
did not interact with are not "marked" so their remain locked..
pleas rise priority
----------------------------------------------------------------------
Comment By: Alexei Yudichev (sflexus)
Date: 2002-11-11 09:34
Message:
Logged In: YES
user_id=345880
Today I saw exception of this kind at the point where it never happened
before. Something is really wrong with RelationSet transaction check. It
cannot be in a different transaction when I directly invoke new
ArrayList(getSlides()) where getSlides() is a cmr getter.
In the
stacktace getXml() and getOrderedSlideList() are private bean
methods.
BTW I overcame the problem I described in the original
comment (at least it never happened since I did that) simply by invoking
new ArrayList(getSlides()).iterator() instead of getSlides().iterator()
by this bypassing direct iterator() call on CMR collection.
Here's
the new exception:
2002-11-09 18:11:49,993 ERROR
[org.jboss.ejb.plugins.LogInterceptor]
RuntimeException:
java.lang.IllegalStateException: A CMR
collection may only be used within the transction in which it was
created
at
org.jboss.ejb.plugins.cmp.jdbc.bridge.RelationSet.getIdList(RelationSet.java:58)
at
org.jboss.ejb.plugins.cmp.jdbc.bridge.RelationSet.size(RelationSet.java:65)
at
java.util.ArrayList.<init>(ArrayList.java:128)
at
com.tw.mms.ejb.SMILBean.getOrderedSlideList(SMILBean.java:89)
at
com.tw.mms.ejb.SMILBean.getXml(SMILBean.java:72)
at
com.tw.mms.ejb.SMILBean.getXmlWithData(SMILBean.java:314)
at
sun.reflect.GeneratedMethodAccessor110.invoke(Unknown
Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at
java.lang.reflect.Method.invoke(Method.java:324)
at
org.jboss.ejb.EntityContainer$ContainerInterceptor.invoke(EntityContainer.java:1194)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCRelationInterceptor.invoke(JDBCRelationInterceptor.java:95)
at
org.jboss.ejb.plugins.EntitySynchronizationInterceptor.invoke(EntitySynchronizationInterceptor.java:297)
at
org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)
at
org.jboss.ejb.plugins.EntityReentranceInterceptor.invoke(EntityReentranceInterceptor.java:90)
at
org.jboss.ejb.plugins.EntityInstanceInterceptor.invoke(EntityInstanceInterceptor.java:163)
at
org.jboss.ejb.plugins.EntityLockInterceptor.invoke(EntityLockInterceptor.java:107)
at
org.jboss.ejb.plugins.EntityCreationInterceptor.invoke(EntityCreationInterceptor.java:69)
at
org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:107)
at
org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:178)
at
org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:60)
at
org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)
at
org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:204)
at
org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:493)
at
org.jboss.ejb.Container.invoke(Container.java:712)
at
org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1058)
at
org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at
org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:382)
at
sun.reflect.GeneratedMethodAccessor59.invoke(Unknown
Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at
java.lang.reflect.Method.invoke(Method.java:324)
at
sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
at
sun.rmi.transport.Transport$1.run(Transport.java:148)
at
java.security.AccessController.doPrivileged(Native Method)
at
sun.rmi.transport.Transport.serviceCall(Transport.java:144)
at
sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at
java.lang.Thread.run(Thread.java:536)
----------------------------------------------------------------------
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