Hi all!
I have a SOAP client with several threads that use the same instance of a helper class
to create a Service object and a Call object in parallell. The helper class has no
instance fields, so all fields are private to each thread. When I run the client I
get the exception listed below.
When I run the initialization without threads, it works.
Any help is greatly appreciated.
With kind regards,
Uwe Kubosch
Exception:
java.lang.NullPointerException
at
org.apache.commons.discovery.resource.classes.DiscoverClasses$1.getNextClass(DiscoverClasses.java:128)
at
org.apache.commons.discovery.resource.classes.DiscoverClasses$1.hasNext(DiscoverClasses.java:116)
at
org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$1.getNextResource(ResourceClassDiscoverImpl.java:159)
at
org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$1.hasNext(ResourceClassDiscoverImpl.java:147)
at
org.apache.axis.configuration.EngineConfigurationFactoryFinder$1.run(EngineConfigurationFactoryFinder.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at
org.apache.axis.configuration.EngineConfigurationFactoryFinder.newFactory(EngineConfigurationFactoryFinder.java:152)
at
org.apache.axis.configuration.EngineConfigurationFactoryFinder.newFactory(EngineConfigurationFactoryFinder.java:199)
at org.apache.axis.client.Service.getEngineConfiguration(Service.java:731)
at org.apache.axis.client.Service.getAxisClient(Service.java:140)
at org.apache.axis.client.Service.<init>(Service.java:149)
at no.bbs.apptest.helpers.SOAPTask.init(SOAPTask.java:71)
at no.bbs.apptest.core.JobImpl.prepareTasks(JobImpl.java:320)
at no.bbs.apptest.core.JobImpl.initTasks(JobImpl.java:305)
at no.bbs.apptest.core.JobImpl.run(JobImpl.java:394)
at java.lang.Thread.run(Thread.java:536)
The method in the client in which the exception occurs is below:
public class SOAPTask {
...
public void init(JobContext jobContext) {
String runUrl;
String uri;
String method;
Object[] params;
Service service;
Call call;
runUrl =
getConfigParam(jobContext, URLUtils.PARAM_BASEURL, true).getValue()
+ getConfigParam(jobContext, "href").getValue();
uri = getConfigParam(jobContext, "uri", true).getValue();
method = getConfigParam(jobContext, "method", true).getValue();
service = new Service();
try {
call = (Call) service.createCall();
call.setTargetEndpointAddress(runUrl);
call.setOperationName(new QName(uri, method));
} catch (ServiceException sex) {
logger.error("Error creating call.", sex);
call = null;
}
params = addParameters(jobContext, call);
jobContext.setAttribute(getName() + "_call", call);
jobContext.setAttribute(getName() + "_params", params);
}
...
}
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