1 Reply Latest reply on Apr 22, 2008 8:20 PM by agenttokyo

Problem with TimerService

hasc Oct 6, 2007 11:03 AM

Hi,

i posted this question already in the seam forum, but i was told I should post the question here again...

I wrote a simple stateless bean to test the TimerService. i am using jboss 4.2.0GA

bean using the TimerService:

@Stateless
@Name("listener")
public class DBChangeListenerService implements DBChangeListener {

 @Resource TimerService timerservice;

 @Logger Log log;

 public DBChangeListenerService() {}

 public void initTimer() {
 log.info("initTimer");
 timerservice.createTimer(2*60*1000, 2*60*1000,"DBChangeListener");
 }

 @Timeout
 public void queryState(Timer timer) {
 log.info("query db state");
 }
}

and the bean calling the initTimer() method:

@Stateless
@AutoCreate
@Name("objectcache")
public class ObjectCacheService implements ObjectCache{


 @In(create=true)
 DBChangeListenerService listener;

 public void init() {
 listener.initTimer();
 }
}

When the init() method is called the following exception is trhrown:

2007-10-02 14:56:55,437 ERROR [org.jboss.ejb.txtimer.TimerServiceImpl] Cannot create txtimer
java.lang.IllegalStateException: Unable to persist timer
 at org.jboss.ejb.txtimer.DatabasePersistencePolicy.insertTimer(DatabasePersistencePolicy.java:124)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
...
...
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
 at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)
 at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:381)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
 at java.lang.Thread.run(Thread.java:595)
Caused by: org.jboss.util.NestedSQLException: Could not enlist in transaction on entering meta-aware
 object!; - nested throwable: (javax.transaction.SystemException: java.lang.Throwable: Unabled to en
list resource, see the previous warnings. tx=TransactionImple < ac, BasicAction: -3f57fdff:555:47023fba:53 status: ActionStatus.ABORT_ONLY >); - nested throwable: (org.jboss.resource.JBossResourceException: Could not enlist in transaction o
n entering meta-aware object!; - nested throwable: (javax.transaction.SystemException: java.lang.Thr
owable: Unabled to enlist resource, see the previous warnings. tx=TransactionImple < ac, BasicAction: -3f57fdff:555:47023fba:53 status: ActionStatus.ABORT_ONLY >))
 at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:94)
 at org.jboss.ejb.txtimer.GeneralPurposeDatabasePersistencePlugin.insertTimer(GeneralPurposeDatabase
PersistencePlugin.java:199)
 at org.jboss.ejb.txtimer.DatabasePersistencePolicy.insertTimer(DatabasePersistencePolicy.java:120)
 ... 317 more
Caused by: org.jboss.resource.JBossResourceException: Could not enlist in transaction on entering me
ta-aware object!; - nested throwable: (javax.transaction.SystemException: java.lang.Throwable: Unabl
ed to enlist resource, see the previous warnings. tx=TransactionImple < ac, BasicAction: -3f57fdff:555:47023fba:53 status: ActionStatus.ABORT_ONLY >)
 at org.jboss.resource.connectionmanager.TxConnectionManager.managedConnectionReconnected(TxConnecti
onManager.java:343)
 at org.jboss.resource.connectionmanager.BaseConnectionManager2.reconnectManagedConnection(BaseConne
ctionManager2.java:518)
 at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionMan
ager2.java:399)
 at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConne
ction(BaseConnectionManager2.java:842)
 at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:88)
 ... 319 more
Caused by: javax.transaction.SystemException: java.lang.Throwable: Unabled to enlist resource, see t
he previous warnings. tx=TransactionImple < ac, BasicAction: -3f57fdff:555:47023fba:53 status: ActionStatus.ABORT_ONLY >
 at org.jboss.resource.connectionmanager.TxConnectionManager$TxConnectionEventListener$TransactionSy
nchronization.checkEnlisted(TxConnectionManager.java:744)
 at org.jboss.resource.connectionmanager.TxConnectionManager$TxConnectionEventListener.enlist(TxConn
ectionManager.java:577)
 at org.jboss.resource.connectionmanager.TxConnectionManager.managedConnectionReconnected(TxConnecti
onManager.java:337)
 ... 323 mor

any tips would be great.

Thanks and regards,
hasc

1. Re: Problem with TimerService

agenttokyo Apr 22, 2008 8:20 PM (in response to hasc)

"hasc" wrote:
Hi,

i posted this question already in the seam forum, but i was told I should post the question here again...

I wrote a simple stateless bean to test the TimerService. i am using jboss 4.2.0GA

I hope you long ago solved your issue =) Bit since I saw this problem a number of places w/out a solution I'm commenting here.

I ran into this moving from Jboss 4.0.5 to 4.2.2 using Postgresql 8.1

Your DS doesn't support the XA interface. I assume there is a way to do this in HSQL as well but found no answer (I saw no XA DataSource in the hsqldb.jar)? But... here is my solution.

In my postgres-dx.xml I had the usual local-tx-datasource, which was used for my entities. I then added the xa-datasource

<datasources>
 <local-tx-datasource>
 <jndi-name>PostGresDS</jndi-name>
 <connection-url>jdbc:postgresql://localhost:5432/blah</connection-url>
 <driver-class>org.postgresql.Driver</driver-class>
 <user-name>user</user-name>
 <password>password</password>
 </local-tx-datasource>

 <xa-datasource>
 <jndi-name>XAPostGresDS</jndi-name>
 <xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
 <xa-datasource-property name="ServerName">localhost</xa-datasource-property>
 <xa-datasource-property name="DatabaseName">blah</xa-datasource-property>
 <xa-datasource-property name="PortNumber">5432</xa-datasource-property>

 <xa-datasource-property name="User">user</xa-datasource-property>
 <xa-datasource-property name="Password">password</xa-datasource-property>

 <metadata>
 <type-mapping>PostgreSQL</type-mapping>
 </metadata>
 </xa-datasource>
</datasources>

The type-mapping is from standardjbosscmp-jdbc.xml

The configuration parameters were identifed in http://wiki.jboss.org/wiki/ConfigDataSources the wiki

And in your ejb-deployer, you should use your newly configured datasource (in my case XAPostGresDS)

 <mbean code="org.jboss.ejb.txtimer.DatabasePersistencePolicy" name="jboss.ejb:service=EJBTimerService,persistencePolicy=database">
 <!-- DataSourceBinding ObjectName -->
 <depends optional-attribute-name="DataSource">jboss.jca:service=DataSourceBinding,name=XAPostGresDS</depends>
 <!-- The plugin that handles database persistence -->
 <attribute name="DatabasePersistencePlugin">org.jboss.ejb.txtimer.GeneralPurposeDatabasePersistencePlugin</attribute>
 <!-- The timers table name -->
 <attribute name="TimersTable">TIMERS</attribute>
 </mbean>

I think thats about it.