Neo4j 4.0.0 throwing NullPointerException - spring

Question

I am a new bee in spring boot and ne04j .I am working on project which contains 2 modules web and core .Web (package as a war) module contains spring controllers and Core (package as a jar) modules contains neo4j repository and domain .Web module include Core module as a jar .When I run project using java -jar web/target/my-project-1.0-SNAPSHOT.war its throwing NullPointerException .
Spring Boot version : 1.3.0.RELEASE
Neo4j : 4.0.0.RELEASE
below are the logs
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.NullPointerException
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) ~[tomcat-embed-core-8.0.28.jar!/:8.0.28]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat-embed-core-8.0.28.jar!/:8.0.28]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812) ~[jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669) ~[jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) ~[jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) ~[jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) ~[jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) ~[jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577) [jetty-security-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) [jetty-servlet-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.Server.handle(Server.java:499) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) [jetty-server-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544) [jetty-io-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) [jetty-util-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) [jetty-util-9.2.14.v20151106.jar!/:9.2.14.v20151106]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_79]
Caused by: java.lang.NullPointerException: null
at org.neo4j.ogm.metadata.MetaData.entityType(MetaData.java:231) ~[neo4j-ogm-1.1.2.jar!/:na]
at org.neo4j.ogm.session.Neo4jSession.entityType(Neo4jSession.java:451) ~[neo4j-ogm-1.1.2.jar!/:na]
at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll(LoadByTypeDelegate.java:55) ~[neo4j-ogm-1.1.2.jar!/:na]
at org.neo4j.ogm.session.delegates.LoadByTypeDelegate.loadAll(LoadByTypeDelegate.java:99) ~[neo4j-ogm-1.1.2.jar!/:na]
at org.neo4j.ogm.session.Neo4jSession.loadAll(Neo4jSession.java:119) ~[neo4j-ogm-1.1.2.jar!/:na]
at org.springframework.data.neo4j.repository.GraphRepositoryImpl.findAll(GraphRepositoryImpl.java:123) ~[spring-data-neo4j-4.0.0.RELEASE.jar!/:na]
at org.springframework.data.neo4j.repository.GraphRepositoryImpl.findAll(GraphRepositoryImpl.java:118) ~[spring-data-neo4j-4.0.0.RELEASE.jar!/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:475) ~[spring-data-commons-1.11.0.RELEASE.jar!/:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:460) ~[spring-data-commons-1.11.0.RELEASE.jar!/:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:432) ~[spring-data-commons-1.11.0.RELEASE.jar!/:na]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281) ~[spring-tx-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at com.sun.proxy.$Proxy60.findAll(Unknown Source) ~[na:na]
at com.ng.adm.neo.serviceImpl.TaskServiceImpl.tasks(TaskServiceImpl.java:22) ~[adm-core-1.0-SNAPSHOT.jar!/:1.0-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281) ~[spring-tx-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) ~[spring-aop-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at com.sun.proxy.$Proxy73.tasks(Unknown Source) ~[na:na]
at com.ng.adm.web.controllers.TaskApiController.tasks(TaskApiController.java:34) ~[classes!/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_79]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_79]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_79]
at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_79]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:222) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) ~[spring-web-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.2.3.RELEASE.jar!/:4.2.3.RELEASE]
Below is my controller from web module (inside war)
enter code here
#Controller("")
public class TaskApiController {
#Autowired
TaskService taskService;
#Autowired
TaskRepository repository;
#ResponseBody
#RequestMapping(value = "api/tasks", method= RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
public List<Task> tasks(#RequestParam(value = "limit",required = false) Integer limit) {
return taskService.tasks(limit == null ? 100 : limit);
}
}
Below is the Neo4j domain from Core module (inside jar)
enter code here
Configuration
#ConfigurationProperties(prefix = "neo4j")
#EnableNeo4jRepositories("com.ng.adm.neo")
public class Neo4jConfig extends Neo4jConfiguration{
private String protocol;
private String host;
private String port;
private String userName;
private String password;
private String url;
private String domainPackage;
#Bean
public Neo4jServer neo4jServer() {
return new RemoteServer(this.protocol+this.host+":"+this.port,this.userName,this.password);
}
#Bean
public SessionFactory getSessionFactory() {
return new SessionFactory(this.domainPackage);
}
public String getProtocol() {
return protocol;
}
public void setProtocol(String protocol) {
this.protocol = protocol;
}
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
public String getPort() {
return port;
}
public void setPort(String port) {
this.port = port;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getDomainPackage() {
return domainPackage;
}
public void setDomainPackage(String domainPackage) {
this.domainPackage = domainPackage;
}
}
Below is the Neo4j Configuration from Core module (inside jar)
enter code here
#JsonIdentityInfo(generator=JSOGGenerator.class)
#NodeEntity
public class Task {
#GraphId Long id;
String taskName;
String taskDescription;
String taskPriority;
String taskStatus;
int taskArchived = 0;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public int getTaskArchived() {
return taskArchived;
}
public String getTaskName() {
return taskName;
}
public void setTaskName(String taskName) {
this.taskName = taskName;
}
public String getTaskDescription() {
return taskDescription;
}
public void setTaskDescription(String taskDescription) {
this.taskDescription = taskDescription;
}
public String getTaskPriority() {
return taskPriority;
}
public void setTaskPriority(String taskPriority) {
this.taskPriority = taskPriority;
}
public String getTaskStatus() {
return taskStatus;
}
public void setTaskStatus(String taskStatus) {
this.taskStatus = taskStatus;
}
public int isTaskArchived() {
return taskArchived;
}
public void setTaskArchived(int taskArchived) {
this.taskArchived = taskArchived;
}
#Override
public String toString() {
return "Task [id=" + id + ", taskName=" + taskName
+ ", taskDescription=" + taskDescription + ", taskPriority="
+ taskPriority + ",taskStatus=" + taskStatus + "]";
}
}
enter code here
Below is my repository from Core module (inside Jar)
enter code here
#RepositoryRestResource(collectionResourceRel = "tasks", path = "tasks")
public interface TaskRepository extends GraphRepository<Task> {
List<Task> findByTaskArchived(#Param("archivedfalse") int taskArchivedFalse);
List<Task> findByTaskStatus(#Param("status") String taskStatus);
/*Student findByFirstName(#Param("firstName") String fname);
#Query("MATCH (n:Student) RETURN n LIMIT {limit}")
List<Map<String,Object>> students(#Param("limit") int limit);*/
}
Below is my service class from from Core module (inside jar)
enter code here
#Service
#Transactional
public class TaskServiceImpl implements TaskService{
#Autowired TaskRepository taskRepository;
#Override
public List<Task> tasks(int limit) {
Iterable<Task> result = taskRepository.findAll();
return (List<Task>) AppUtils.makeCollection(result);
}
}
its working when I am running project from mvn spring-boot:run command but getting exception from command java -jar web/target/my-project-1.0-SNAPSHOT.war .
Please help me in finding the issue .
Thanks in advance .

Answer 1

I had the same error, and it was due to my domain package being incorrect in the SessionFactory bean.
#Bean
public SessionFactory getSessionFactory() {
return new SessionFactory("com.make.sure.this.is.right");
}
Note, you can pass in multiple package parameters.

Answer 2

Think this issue was fixed- please upgrade the neo4j-ogm dependency version to 1.1.4