javax.servlet.ServletException: org.hibernate.exception.GenericJDBCException: could not execute statement

Ao tentar testar gravar um registro no banco usando postman ocorre o seguinte erro:

Type Exception Report

Message org.hibernate.exception.GenericJDBCException: could not execute statement

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: org.hibernate.exception.GenericJDBCException: could not execute statement
org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:487)
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

org.hibernate.exception.GenericJDBCException: could not execute statement
org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54)
org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126)
org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112)
org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:211)
org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96)
org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3032)
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3558)
org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:98)
org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:492)
org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:197)
org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:181)
org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:216)
org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:334)
org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:289)
org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195)
org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:126)
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:715)
org.hibernate.internal.SessionImpl.save(SessionImpl.java:707)
org.hibernate.internal.SessionImpl.save(SessionImpl.java:702)
br.com.servico.dao.GenericDAO.salvar(GenericDAO.java:29)
br.com.servico.service.MensagemService.enviarMensagem(MensagemService.java:56)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
org.glassfish.jersey.internal.Errors.process(Errors.java:315)
org.glassfish.jersey.internal.Errors.process(Errors.java:297)
org.glassfish.jersey.internal.Errors.process(Errors.java:267)
org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:471)
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
Root Cause

java.sql.SQLException: Field ‘grupo’ doesn’t have a default value
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3847)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3783)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2447)
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2594)
com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2545)
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1901)
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2113)
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2049)
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2034)
org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:208)
org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96)
org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3032)
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3558)
org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:98)
org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:492)
org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:197)
org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:181)
org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:216)
org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:334)
org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:289)
org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195)
org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:126)
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)
org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:715)
org.hibernate.internal.SessionImpl.save(SessionImpl.java:707)
org.hibernate.internal.SessionImpl.save(SessionImpl.java:702)
br.com.servico.dao.GenericDAO.salvar(GenericDAO.java:29)
br.com.servico.service.MensagemService.enviarMensagem(MensagemService.java:56)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
org.glassfish.jersey.internal.Errors.process(Errors.java:315)
org.glassfish.jersey.internal.Errors.process(Errors.java:297)
org.glassfish.jersey.internal.Errors.process(Errors.java:267)
org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:471)
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Classe modelo:

@SuppressWarnings(“serial”)
@Entity
public class Mensagem extends GenericDomain {

@Column(length = 60, nullable = false)
private Usuario usuario;

@ManyToOne
@JoinColumn()
private Grupo grupo;

@Column(length = 60, nullable = false)
private String mensagem;

@Temporal(TemporalType.TIMESTAMP)
private Calendar postagem;

@Column(nullable = false)
private Integer contadorSpam = 0;

public Mensagem() {
}

Meu teste:

	@Test
public void gerarJson() {
	
	Gson gson = new Gson();
	
	Mensagem mensagem = new Mensagem();
	Grupo grupo = new Grupo();
	GrupoDAO grupodao = new GrupoDAO();
	grupo = grupodao.buscar(1L);
	
	
	mensagem.setContadorSpam(0);
	mensagem.setGrupo(grupo);
	mensagem.setMensagem("MEnsagem de teste 123");
	mensagem.setPostagem(Calendar.getInstance());
	mensagem.setUsuario(grupo.getModerador());
	
	String mensagemJson = gson.toJson(mensagem);
	
	System.out.println(mensagemJson);

}

}

arquivo json que tento enviar:

{“usuario”:
{
“nome”:“Nuala”,
“sobreNome”:“Morita”,
“email”:"NuMorita@gmail.com",
“senha”:“123”,“curso”:“ADS”,
“semestre”:“6”,
“codigo”:4
}
,“grupo”:
{
“nomeGrupo”:“TesteGrupo”,
“nomeMateria”:“TesteMateria”,
“notaGrupo”:0.0,
“moderador”:
{“nome”:“Nuala”,
“sobreNome”:“Morita”,
“email”:"NuMorita@gmail.com",
“senha”:“123”,
“curso”:“ADS”,
“semestre”:“6”,
“codigo”:4
}
,“codigo”:2
},
“mensagem”:“MEnsagem de teste 123”,
“postagem”:{
“year”:2019,
“month”:9,
“dayOfMonth”:18,
“hourOfDay”:10,
“minute”:32,
“second”:30
},
“contadorSpam”:0
}

O campo grupo está null

Sua busca deve estar retornando null

Mas eu estou testando pelo Postman usando Json, que coloquei depois e está preenchido, até onde entendo

Após apagar tabela e fazer hibernate criar novamente funcionou.