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  1. JBoss BPMS Platform
  2. RHBPMS-4558

[GSS](6.4.z) NPE when searching nonexistent task using the method UserTaskServicesClient.findTaskById

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Details

    • Bug
    • Resolution: Done
    • Major
    • 6.4.2
    • 6.4.0
    • Kie-Server
    • CR1
    • Workaround Exists
    • Hide

      use the taskClient.getTaskInstance method

      Show
      use the taskClient.getTaskInstance method
      • Start a Kie server
      • Use the kie server java client API to try to search a task that does not exist by id using the `taskClient.findTaskById` method

    Description

      When using the KieServer Java client and trying to search a task by ID using the method findTaskById from UserTaskServicesClient, we have a NPE in server side, resulting in an unexpected exception on client side. It should throw a 404 instead.

      • sample code
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      configuration = KieServicesFactory.newRestConfiguration(URL, USR, PSW);
// we can choose between XSTREAM, JSON and JAXB - default is JAXB
configuration.setMarshallingFormat(MarshallingFormat.JAXB);
// the time that the client can wait for a server response
configuration.setTimeout(5000);
client = KieServicesFactory.newKieServicesClient(configuration);
UserTaskServicesClient taskClient =  client.getServicesClient(UserTaskServicesClient.class);

// try to get a non existing task
taskClient.findTaskById(123456l);

      Exception thrown on server side

      10:59:35,212 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/kie-server].[org.kie.server.remote.rest.common.KieServerApplication]] (http-127.0.0.1:8180-1) JBWEB000236: Servlet.service() for servlet org.kie.server.remote.rest.common.KieServerApplication threw exception: org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
	at org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:367) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:235) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:211) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:576) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:543) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:128) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-2.jar:1.0.2.Final-redhat-2]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:231) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:512) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.5.7.Final-redhat-3.jar:7.5.7.Final-redhat-3]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:150) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:854) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:654) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:926) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
	at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_71]
Caused by: java.lang.NullPointerException
	at org.kie.server.services.jbpm.ConvertUtils.convertToTask(ConvertUtils.java:290) [kie-server-services-jbpm-6.5.0.Final-redhat-2.jar:6.5.0.Final-redhat-2]
	at org.kie.server.services.jbpm.RuntimeDataServiceBase.getTaskById(RuntimeDataServiceBase.java:356) [kie-server-services-jbpm-6.5.0.Final-redhat-2.jar:6.5.0.Final-redhat-2]
	at org.kie.server.remote.rest.jbpm.RuntimeDataResource.getTaskById(RuntimeDataResource.java:336) [kie-server-rest-jbpm-6.5.0.Final-redhat-2.jar:6.5.0.Final-redhat-2]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0_71]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) [rt.jar:1.8.0_71]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_71]
	at java.lang.reflect.Method.invoke(Method.java:497) [rt.jar:1.8.0_71]
	at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:168) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:269) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:227) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:216) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:561) [resteasy-jaxrs-2.3.13.Final-redhat-1.jar:]
	... 20 more

      With this exception the client is throwing a 500 meaningless error. But the client should thrown a 404 error, such as(the following exception is thrown by other methods, such as `taskClient.getTaskInstance`):

      Exception in thread "main" org.kie.server.client.KieServicesException: Unexpected HTTP response code when requesting URI 'http://localhost:8180/kie-server/services/rest/server/containers/rewards/tasks/123456'! Error code: 404, message: Could not find task instance with id "123,456"
	at org.kie.server.client.impl.AbstractKieServicesClientImpl.createExceptionForUnexpectedResponseCode(AbstractKieServicesClientImpl.java:551)
	at org.kie.server.client.impl.AbstractKieServicesClientImpl.makeHttpGetRequestAndCreateCustomResponse(AbstractKieServicesClientImpl.java:189)
	at org.kie.server.client.impl.UserTaskServicesClientImpl.getTaskInstance(UserTaskServicesClientImpl.java:759)
	at reproducer.KieServerClientSample.main(KieServerClientSample.java:42)

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          Bug - A problem that impairs or prevents the functions of the product. RHPAM-104 NPE when searching nonexistent task using the method UserTaskServicesClient.findTaskById

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

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            People

              swiderski.maciej Maciej Swiderski (Inactive)
              rhn-support-wsiqueir William Siqueira
              Karel Suta Karel Suta
              Karel Suta Karel Suta
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                Updated:
                Resolved: