I am using the Scheduler Service that ships with 3.2.1. I am attempting to
schedule work to be done through a class that implements the Schedulable
interface (as listed in Chapter 10 of the DOCO).
I am getting a NoClassDefFoundException inside my class while trying to
instantiate an object. However, the class that I am trying to instantiate is in
the very same JAR as the class that implements Schedulable!
17:05:54,285 DEBUG [MailerSchedulable] java.lang.ClassNotFoundException:
Unexpected error during load of: gov.doe.eia.mailer.queue.QueueProperties,
msg=gov/doe/eia/deploy/prop/BasePropertiesLoader
17:10:09,041 ERROR [STDERR] java.lang.NoClassDefFoundError:
gov/doe/eia/mailer/queue/QueueProperties
I used the JMX-Console to look in the repository for the class that causing the
error, not found. However, if I look for my Schedulable class, it's found, in
the JAR that the other class is in.
Any ideas why this is happening? Is there a 'better' way to deploy this such
that I don't have this problem?
Thanks.
T
---
scheduler-service.xml
<mbean code="org.jboss.varia.scheduler.Scheduler"
name=":service=MailerScheduler">
<attribute name="StartAtStartup">true</attribute>
<attribute
name="SchedulableClass">gov.doe.eia.mailer.scheduler.jboss.MailerSchedulable</att
ribute>
<!--
<attribute name="SchedulableArguments">Schedulabe Test,12345</attribute>
<attribute name="SchedulableArgumentTypes">java.lang.String,int</attribute>
-->
<attribute name="InitialStartDate">NOW</attribute>
<attribute name="SchedulePeriod">60000</attribute>
<attribute name="InitialRepetitions">10</attribute>
</mbean>
[ -- code snippet begin -- ]
public class MailerSchedulable implements Schedulable
{
private static final Logger log = Logger.getLogger(MailerSchedulable.class);
/**
* @see org.jboss.varia.scheduler.Schedulable#perform(java.util.Date, long)
*/
public void perform(Date now, long remainingRepetitions)
{
log.info("attempting to start mail queue processing at " + now);
try
{
ClassLoader loader =
Thread.currentThread().getContextClassLoader();
QueueProperties prop =
QueueProperties.getInstance(loader); // NoClassDefFoundError here
....
}
catch ( Exception ex )
{
}
}
}
[ -- code snippet end -- ]
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