title: Spring Boot org.springframework.web.util.NestedServletException: Request processing failed
body: <p>I work to test a RESTful API and the test method is provided, </p>
  
  <pre><code>@RunWith(SpringRunner.class)
  @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.MOCK)
  @AutoConfigureMockMvc
  public class AppointmentAPITest {
  
  
      /*
       * we need a system to simulate this behavior without starting a
       * full HTTP server. MockMvc is the Spring class that does that.
       * */
      @Autowired
      private MockMvc mockMvc;
  
      @MockBean
      private AppointmentAPI api;
  
  
      @Test
      public void getAppointments_findById() throws Exception {
  
  
          Appointment appoint1 = new Appointment(Date.valueOf("2018-09-01"), Time.valueOf("01:12:16"), "Vania Vong", 125.5);
          Appointment appoint2 = new Appointment(Date.valueOf("2018-10-15"), Time.valueOf("08:30:00"), "Maria Wang", 275);
  
  
          given(api.findById(1L)).willReturn(ResponseEntity.ok(appoint1));
          given(api.findById(2L)).willReturn(ResponseEntity.ok(appoint2));
  
          mockMvc.perform(get("/api/v1/appointments/1")
  
                  .contentType(MediaType.APPLICATION_JSON))
                  .andExpect(status().isOk())
                  .andExpect(jsonPath("$", hasSize(1)))
                  .andExpect(jsonPath("$[0].name_of_doctor", is(appoint1.getName_of_doctor())));
      }}
  </code></pre>
  
  <p>The entity is provided below, </p>
  
  <pre><code>@Entity
  public class Appointment {
  
      @Id
      @GeneratedValue(strategy = GenerationType.IDENTITY)
      private Long id;
  
      @Column
      private java.sql.Time created_at;
  
      @Column
      @DateTimeFormat(pattern = "yyyy-MM-dd")
      private java.sql.Date appointment_date;
  
      @Column
      @Size(min = 3, max = 20)
      private String name_of_doctor;
  
      @Embedded
      private Status status;
  
      @Column
      private double price;
  
      public Appointment() {
  
      }
  
      public Appointment(Date appointment_date, Time created_at, String name_of_doctor, double price) {
  
          this.created_at = created_at;
          this.appointment_date = appointment_date;
          this.name_of_doctor = name_of_doctor;
          this.price = price;
      }
  
      public Appointment(String name_of_doctor, Status status, double price) {
  
          this.name_of_doctor = name_of_doctor;
          this.status = status;
          this.price = price;
      }
  
  
      public Appointment(String name_of_doctor, double price) {
  
          this.name_of_doctor = name_of_doctor;
          this.price = price;
      }
  
  
      public Long getId() {
          return id;
      }
  
      public void setId(Long id) {
          this.id = id;
      }
  
      public Time getCreated_at() {
          return created_at;
      }
  
      public void setCreated_at(Time created_at) {
          this.created_at = created_at;
      }
  
      public Date getAppointment_date() {
          return appointment_date;
      }
  
      public void setAppointment_date(Date appointment_date) {
          this.appointment_date = appointment_date;
      }
  
      public String getName_of_doctor() {
          return name_of_doctor;
      }
  
      public void setName_of_doctor(String name_of_doctor) {
          this.name_of_doctor = name_of_doctor;
      }
  
      public Status getStatus() {
          return status;
      }
  
      public void setStatus(Status status) {
          this.status = status;
      }
  
      public double getPrice() {
          return price;
      }
  
      public void setPrice(double price) {
          this.price = price;
      }
  
  
      @Override
      public boolean equals(Object o) {
          if (this == o) return true;
          if (!(o instanceof Appointment)) return false;
          Appointment that = (Appointment) o;
          return Double.compare(that.getPrice(), getPrice()) == 0 &amp;&amp;
                  Objects.equals(getId(), that.getId()) &amp;&amp;
                  Objects.equals(getCreated_at(), that.getCreated_at()) &amp;&amp;
                  Objects.equals(getAppointment_date(), that.getAppointment_date()) &amp;&amp;
                  Objects.equals(getName_of_doctor(), that.getName_of_doctor()) &amp;&amp;
                  Objects.equals(getStatus(), that.getStatus());
      }
  
      @Override
      public int hashCode() {
  
          return Objects.hash(getId(), getCreated_at(), getAppointment_date(), getName_of_doctor(), getStatus(), getPrice());
      }
  
      @Override
      public String toString() {
          return "Appointment{" +
                  "id=" + id +
                  ", created_at=" + created_at +
                  ", appointment_date=" + appointment_date +
                  ", name_of_doctor='" + name_of_doctor + '\'' +
                  ", status=" + status +
                  ", price=" + price +
                  '}';
      }
  }
  </code></pre>
  
  <p>The API end-point is provided below, </p>
  
  <pre><code>  @RestController
    @RequestMapping("/api/v1/appointments")
  
  public class AppointmentAPI {
  
  
      @Autowired
      AppointmentServiceImpl service;
  @GetMapping("/{id}")
      public ResponseEntity&lt;Appointment&gt; findById(@PathVariable Long id) {
  
  
          Optional&lt;Appointment&gt; appointment = service.findById(id);
  
          if (!appointment.isPresent()) {
              ResponseEntity.badRequest().build();
          }
  
          return ResponseEntity.ok(appointment.get());
      }
  
  
  
     // ..............
     }
  </code></pre>
  
  <p>When I run the test, I get the error provided, </p>
  
  <pre><code>org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.IllegalArgumentException: Name for argument type [java.lang.Long] not available, and parameter name information not found in class file either.
  
      at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1013)
      at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
      at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
      at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:71)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
      at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:166)
      at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133)
      at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133)
      at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133)
      at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133)
      at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133)
      at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:182)
      at com.appoint.manager.Appointment.api.AppointmentAPITest.getAppointments_findById(AppointmentAPITest.java:66)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
      at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
      at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
      at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
      at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
      at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
      at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
      at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
      at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
      at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
      at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
      at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
      at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
  Caused by: java.lang.IllegalArgumentException: Name for argument type [java.lang.Long] not available, and parameter name information not found in class file either.
      at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.updateNamedValueInfo(AbstractNamedValueMethodArgumentResolver.java:172)
      at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.getNamedValueInfo(AbstractNamedValueMethodArgumentResolver.java:149)
      at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:98)
      at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:126)
      at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:166)
      at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)
      at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800)
      at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
      at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
      at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
      at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
      ... 51 more
  </code></pre>
  
  <p>Why does it saying the Name for argument type [java.lang.Long] not available, and parameter name information not found in class?</p>