title: How can I solve this issue?? java.lang.ClassCastException
body: <p><strong>Whitelabel Error Page</strong><br/>
  This application has no explicit mapping for /error, so you are seeing this as a fallback.<br/></p>
  
  <p>Mon Aug 13 21:40:42 EEST 2018<br/>
  There was an unexpected error (type=Internal Server Error, status=500).<br/> 
   <strong>DataBaseTest.Instructor cannot be cast to DataBaseTest.Instructor</strong> <br/></p>
  
  <pre><code>import org.hibernate.Session;
  import org.hibernate.SessionFactory;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RestController;
  import DataBaseTest.Instructor;
  
      @RestController
      public class TestWebService {
  
          @Autowired
          private  SessionFactory sessionFactory ;
  
          @GetMapping(path="/user")
          public Instructor getUser(){
              Session session = sessionFactory.getCurrentSession();
              session.beginTransaction();
              Instructor instructor = (Instructor) session.get(Instructor.class,1);
              System.out.println(instructor);
              return instructor;
          }
  </code></pre>
  
  <p>----------------------------class Instructor------------------------</p>
  
  <pre><code>@Entity
  @Table(name="instructor")
  public class Instructor {
      @Id
      @GeneratedValue(strategy=GenerationType.IDENTITY)
      @Column(name="id")
      private int id ;
  
      @Column(name="first_name")
      private String firstName ;
  
      @Column(name="last_name")
      private String lastName ;
  
      @Column(name="email")
      private String email ;
  
      @OneToOne(cascade=CascadeType.ALL)
      @JoinColumn(name="instructor_detail_id")
      InstructorDetails instructorDetails ;
  
      public Instructor(){
  
      }
  
      public Instructor(String firstName, String lastName, String email) {
          super();
          this.firstName = firstName;
          this.lastName = lastName;
          this.email = email;
      }
  
      public int getId() {
          return id;
      }
  
      public String getFirstName() {
          return firstName;
      }
  
      public void setFirstName(String firstName) {
          this.firstName = firstName;
      }
  
      public String getLastName() {
          return lastName;
      }
  
      public void setLastName(String lastName) {
          this.lastName = lastName;
      }
  
      public String getEmail() {
          return email;
      }
  
      public void setEmail(String email) {
          this.email = email;
      }
  
      public InstructorDetails getInstructorDetails() {
          return instructorDetails;
      }
  
      public void setInstructorDetails(InstructorDetails instructorDetails) {
          this.instructorDetails = instructorDetails;
      }
  
      @Override
      public String toString() {
          return "Instructor [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email
                  + ", instructorDetails=" + instructorDetails + "]";
      }
  
  
  }
  </code></pre>
  
  <p>----------------------------class Instructor Details ------------------------</p>
  
  <pre><code>@Entity
  @Table(name="instructor_detail")
  public class InstructorDetails {
  
      @Id
      @GeneratedValue(strategy=GenerationType.IDENTITY)
      @Column(name="id")
      private int id ;
  
      @Column(name="youtube_channel")
      private String youtubeChanel ;
  
      @Column(name="hobby")
      private String hobby ;
  
      public InstructorDetails(){
  
      }
  
      public InstructorDetails(String youtubeChanel, String hobby) {
          super();
          this.youtubeChanel = youtubeChanel;
          this.hobby = hobby;
      }
  
      public int getId() {
          return id;
      }
  
      public String getYoutubeChanel() {
          return youtubeChanel;
      }
  
      public void setYoutubeChanel(String youtubeChanel) {
          this.youtubeChanel = youtubeChanel;
      }
  
      public String getHobby() {
          return hobby;
      }
  
      public void setHobby(String hobby) {
          this.hobby = hobby;
      }
  
      @Override
      public String toString() {
          return "InstructorDetails [id=" + id + ", youtubeChanel=" + youtubeChanel + ", hobby=" + hobby + "]";
      }
  
  
  
  }
  </code></pre>
  
  <p>---------------------------Application ----------------</p>
  
  <pre><code>@SpringBootApplication
  public class Application {
      public SessionFactory getSessionFactory() {
          return new Configuration().configure("hibernate.cfg2.xml").
                  addAnnotatedClass(Instructor.class).addAnnotatedClass(InstructorDetails.class).
                  buildSessionFactory();
      }
  
      public static void main(String[] args) {
          SpringApplication.run(Application.class, args);
      }
  }
  </code></pre>
  
  <p>-----------------------------hibernate.cfg2.xml------------------------------</p>
  
  <pre><code>&lt;!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"&gt;
  
  &lt;hibernate-configuration&gt;
  
      &lt;session-factory&gt;
  
          &lt;!-- JDBC Database connection settings --&gt;
          &lt;property name="connection.driver_class"&gt;com.mysql.jdbc.Driver&lt;/property&gt;
          &lt;property name="connection.url"&gt;jdbc:mysql://localhost:3306/hb-01-one-to-one-uni?useSSL=false&lt;/property&gt;
          &lt;property name="connection.username"&gt;hbstudent&lt;/property&gt;
          &lt;property name="connection.password"&gt;hbstudent&lt;/property&gt;
  
          &lt;!-- JDBC connection pool settings ... using built-in test pool --&gt;
          &lt;property name="connection.pool_size"&gt;100&lt;/property&gt;
  
          &lt;!-- Select our SQL dialect --&gt;
          &lt;property name="dialect"&gt;org.hibernate.dialect.MySQLDialect&lt;/property&gt;
  
          &lt;!-- Echo the SQL to stdout --&gt;
          &lt;property name="show_sql"&gt;true&lt;/property&gt;
  
          &lt;!-- Set the current session context --&gt;
          &lt;property name="current_session_context_class"&gt;thread&lt;/property&gt;
  
      &lt;/session-factory&gt;
  
  &lt;/hibernate-configuration&gt;
  </code></pre>
  
  <hr>
  
  <pre><code>2018-08-14 11:27:48.429  INFO 6924 --- [  restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$af5c7f54] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
  2018-08-14 11:27:49.520  INFO 6924 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
  2018-08-14 11:27:49.559  INFO 6924 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
  2018-08-14 11:27:49.560  INFO 6924 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/9.0.10
  2018-08-14 11:27:49.580  INFO 6924 --- [  restartedMain] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jre1.8.0_144\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre1.8.0_144/bin/server;C:/Program Files/Java/jre1.8.0_144/bin;C:/Program Files/Java/jre1.8.0_144/lib/amd64;C:\ProgramData\Oracle\Java\javapath;C:\Program Files\Dell\DW WLAN Card;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;c:\Program Files\WIDCOMM\Bluetooth Software\;c:\Program Files\WIDCOMM\Bluetooth Software\syswow64;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files (x86)\GtkSharp\2.12\bin;C:\Program Files\Microsoft\Web Platform Installer\;C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\;C:\Program Files (x86)\Windows Kits\8.0\Windows Performance Toolkit\;C:\Program Files\Git\cmd;%M2_HOME%\bin;E:\Department\Java\gradle-4.7\bin;D:\;E:\apache-maven-3.1.1\bin ;C:\Users\Mohammed Mars\AppData\Roaming\npm;E:\eclipse;;.]
  2018-08-14 11:27:49.776  INFO 6924 --- [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
  2018-08-14 11:27:49.776  INFO 6924 --- [  restartedMain] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 4625 ms
  2018-08-14 11:27:49.858  INFO 6924 --- [  restartedMain] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]
  2018-08-14 11:27:49.862  INFO 6924 --- [  restartedMain] o.s.b.w.servlet.ServletRegistrationBean  : Servlet webServlet mapped to [/h2-console/*]
  2018-08-14 11:27:49.868  INFO 6924 --- [  restartedMain] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
  2018-08-14 11:27:49.869  INFO 6924 --- [  restartedMain] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
  2018-08-14 11:27:49.869  INFO 6924 --- [  restartedMain] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
  2018-08-14 11:27:49.869  INFO 6924 --- [  restartedMain] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
  2018-08-14 11:27:50.295  INFO 6924 --- [  restartedMain] org.hibernate.Version                    : HHH000412: Hibernate Core {5.3.3.Final}
  2018-08-14 11:27:50.300  INFO 6924 --- [  restartedMain] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
  2018-08-14 11:27:50.619  INFO 6924 --- [  restartedMain] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
  2018-08-14 11:27:50.818  WARN 6924 --- [  restartedMain] org.hibernate.orm.connections.pooling    : HHH10001002: Using Hibernate built-in connection pool (not for production use!)
  2018-08-14 11:27:50.821  INFO 6924 --- [  restartedMain] org.hibernate.orm.connections.pooling    : HHH10001005: using driver [null] at URL [jdbc:mysql://localhost:3306/hb-01-one-to-one-uni?useSSL=false]
  2018-08-14 11:27:50.822  INFO 6924 --- [  restartedMain] org.hibernate.orm.connections.pooling    : HHH10001001: Connection properties: {user=hbstudent, password=****}
  2018-08-14 11:27:50.822  INFO 6924 --- [  restartedMain] org.hibernate.orm.connections.pooling    : HHH10001003: Autocommit mode: false
  2018-08-14 11:27:50.827  INFO 6924 --- [  restartedMain] .c.i.DriverManagerConnectionProviderImpl : HHH000115: Hibernate connection pool size: 1 (min=1)
  2018-08-14 11:27:51.099  INFO 6924 --- [  restartedMain] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
  2018-08-14 11:27:52.413  INFO 6924 --- [  restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService  'applicationTaskExecutor'
  2018-08-14 11:27:52.964  WARN 6924 --- [  restartedMain] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
  2018-08-14 11:27:53.456  INFO 6924 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
  2018-08-14 11:27:53.816  INFO 6924 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
  2018-08-14 11:27:54.228  INFO 6924 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
  2018-08-14 11:27:54.719  INFO 6924 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
  2018-08-14 11:27:54.737  INFO 6924 --- [  restartedMain] c.Q.mars.E3lnle_Project.V3.Application   : Started Application in 10.557 seconds (JVM running for 11.825)
  2018-08-14 11:28:07.217  INFO 6924 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'
  2018-08-14 11:28:07.217  INFO 6924 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'
  2018-08-14 11:28:07.253  INFO 6924 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 36 ms
  Hibernate: select instructor0_.id as id1_0_0_, instructor0_.email as email2_0_0_, instructor0_.first_name as first_na3_0_0_, instructor0_.instructor_detail_id as instruct5_0_0_, instructor0_.last_name as last_nam4_0_0_, instructor1_.id as id1_1_1_, instructor1_.hobby as hobby2_1_1_, instructor1_.youtube_channel as youtube_3_1_1_ from instructor instructor0_ left outer join instructor_detail instructor1_ on instructor0_.instructor_detail_id=instructor1_.id where instructor0_.id=?
  2018-08-14 11:28:07.919 ERROR 6924 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.ClassCastException: DataBaseTest.Instructor cannot be cast to DataBaseTest.Instructor] with root cause
  
  java.lang.ClassCastException: DataBaseTest.Instructor cannot be cast to DataBaseTest.Instructor
      at com.Quraan.mars.E3lnle_Project.V3.webService.TestWebService.getUser(TestWebService.java:27) ~[classes/:na]
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_144]
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_144]
      at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_144]
      at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:207) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:799) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1041) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1012) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:904) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:889) ~[spring-webmvc-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:112) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.0.BUILD-SNAPSHOT.jar:5.1.0.BUILD-SNAPSHOT]
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_144]
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_144]
      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.10.jar:9.0.10]
      at java.lang.Thread.run(Unknown Source) [na:1.8.0_144]
  </code></pre>