java.lang.ClassNotFoundException: No ClassLoaders found

[bwtoh]

I have this in /usr/local/jboss/server/cirebon/deploy/scheduler-service.xml

 <mbean code="org.jboss.varia.scheduler.Scheduler"
 name=":service=Scheduler">
 <attribute name="StartAtStartup">true</attribute>
 <attribute name="SchedulableClass">com.xxx.TS</attribute>
 <attribute name="SchedulableArguments"></attribute>
 <attribute name="SchedulableArgumentTypes"></attribute>
 <attribute name="InitialStartDate">0</attribute>
 <attribute name="SchedulePeriod">30000</attribute>
 <attribute name="InitialRepetitions">-1</attribute>
 </mbean>

But when I startup JBoss I encountered this error.

2004-12-30 17:21:43,110 INFO [org.jboss.varia.scheduler.Scheduler]
Failed to find: com.xxx.Text2SMS
java.lang.ClassNotFoundException: No ClassLoaders found for:
com.xxx.TS
 at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:161)

I extracted the ear and confirmed that my new java class :
com/xxx/TS.class
is in my ear along with the many other class files.

All other files are able to load.


My colleague informed me that
I forgot the

<depends>

attribute. It complain the class is not there
because the ear/war/sar is not yet loaded by JBoss.


I tried adding

<depends>

:

 <mbean code="org.jboss.varia.scheduler.Scheduler"
 name=":service=Scheduler">
 <attribute name="StartAtStartup">true</attribute>
 <attribute name="SchedulableClass">com.xxx.TS</attribute>
 <attribute name="SchedulableArguments"/>
 <attribute name="SchedulableArgumentTypes"/>
 <attribute name="InitialStartDate">0</attribute>
 <attribute name="SchedulePeriod">30000</attribute>
 <attribute name="InitialRepetitions">-1</attribute>
 <depends>jboss.j2ee:service=EARDeployer</depends>
 </mbean>

with values such as :

<depends>module=aaa.jar,service=EjbModule</depends>
<depends>service=EARDeployer</depends>

But still face the same problem.
The new class is in
aaa.jar


Pls help.

[starksm64]

The depends tag does not handle class level dependencies. It only delays when services are started. In general you should not be using the deploy/scheduler-service.xml because of this. You should be adding a myscheduler-service.xml to your own deployments to ensure that the classes will be available.

[bwtoh]

Dear Stark,

Thanks for the reply.

Are there any docs or manual where I can learn how to use a Schedulable class, schedule a service and solve my problem above ?

Thanks again,
bwtoh

[genman]

I don't know if there are any docs for this specific case. But in short the lesson is this: Classes in your .ear are only available (usually I suppose) to components deployed from the .ear. Add a myscheduler.sar to your .ear, and add the .sar to your application.xml.

Example in ant:

 <jar jarfile="${ear.dir}/myscheduler.sar">
 <manifest>
 <attribute name="Class-Path" value="lib/myclasses.jar"/>
 </manifest>
 <metainf dir="conf" includes="jboss-service.xml"/>
 </jar>