[jboss-jira] [JBoss JIRA] (WFLY-11793) JPA EntityManager merge infinite loop - java.lang.StackOverflowError

[James Perkins (Jira)]

     [ https://issues.jboss.org/browse/WFLY-11793?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

James Perkins updated WFLY-11793:
---------------------------------
    Steps to Reproduce: 
Perform the following mapping with JPA:

{code:java}
public class Papel{
	....
	@OneToMany(mappedBy = "id.papel", cascade = { CascadeType.ALL }, orphanRemoval = true)
	private List<PermissaoAtribuida> permissoesAtribuidas = new ArrayList<>();
	....
}
{code}

{code:java}
public class Permissao{
	....
	@Id
	@Getter
	@Setter
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	@Column(name = "PK", insertable = false, updatable = false)
	private Integer id;
	....
}
{code}
{code:java}
public class PermissaoAtribuida{
	....
	@EmbeddedId
	private Id id;

	@Embeddable
	@EqualsAndHashCode(of = { "permissao", "papel" })
	public static class Id{

		@ManyToOne(optional = false, fetch = FetchType.LAZY)
		@JoinColumn(name = "FK_PERMISSAO", nullable = false)
		private Permissao permissao;

		@ManyToOne(optional = false, fetch = FetchType.LAZY)
		@JoinColumn(name = "FK_PAPEL", nullable = false)
		private Papel papel;
	}
	....
}
{code}

And invoke the following code snippet, whereas papelServico is an EJB abstracting the DAO layer:

{code:java}
Papel papel = new Papel();
papel.setNome("Insert");
papelServico.insert(papel);
Permissao permissao = ...
List<PermissaoAtribuida> l = new ArrayList<>();
l.add(new PermissaoAtribuida(permissao, papel));
papel.setPermissoesAtribuidas(l);
papel.setNome("Update");
papelServico.update(papel);
{code}

This problem only occurs if the permissaoAtribuida properties of class Papel are mapped with cascade = {CascadeType.ALL}.

  was:
Perform the following mapping with JPA:

public class Papel{
	....
	@OneToMany(mappedBy = "id.papel", cascade = { CascadeType.ALL }, orphanRemoval = true)
	private List<PermissaoAtribuida> permissoesAtribuidas = new ArrayList<>();
	....
}

public class Permissao{
	....
	@Id
	@Getter
	@Setter
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	@Column(name = "PK", insertable = false, updatable = false)
	private Integer id;
	....
}

public class PermissaoAtribuida{
	....
	@EmbeddedId
	private Id id;

	@Embeddable
	@EqualsAndHashCode(of = { "permissao", "papel" })
	public static class Id{

		@ManyToOne(optional = false, fetch = FetchType.LAZY)
		@JoinColumn(name = "FK_PERMISSAO", nullable = false)
		private Permissao permissao;

		@ManyToOne(optional = false, fetch = FetchType.LAZY)
		@JoinColumn(name = "FK_PAPEL", nullable = false)
		private Papel papel;
	}
	....
}

And invoke the following code snippet, whereas papelServico is an EJB abstracting the DAO layer:

Papel papel = new Papel();
papel.setNome("Insert");
papelServico.insert(papel);
Permissao permissao = ...
List<PermissaoAtribuida> l = new ArrayList<>();
l.add(new PermissaoAtribuida(permissao, papel));
papel.setPermissoesAtribuidas(l);
papel.setNome("Update");
papelServico.update(papel);

This problem only occurs if the permissaoAtribuida properties of class Papel are mapped with cascade = {CascadeType.ALL}.



> JPA EntityManager merge infinite loop - java.lang.StackOverflowError
> --------------------------------------------------------------------
>
>                 Key: WFLY-11793
>                 URL: https://issues.jboss.org/browse/WFLY-11793
>             Project: WildFly
>          Issue Type: Bug
>          Components: JPA / Hibernate
>    Affects Versions: 15.0.1.Final
>         Environment: MAC OS Mojave
> Java 11
> Wildfly 15.0.1-Final
> Data Base Postgresql
>            Reporter: Bruno Maioli Martins
>            Assignee: Scott Marlow
>            Priority: Critical
>         Attachments: jstack.txt, server+querys.log, server-1.log, teste.zip
>
>
> Dear,
> When executing the update of a record invoking getEntityManager().merge(obj) the application goes into infinite loop. This behavior only occurs when there is a OneToMany bidirectional mapping of the entity Papel -> PermissaoAtribuida.
> If the same code runs outside of the Wildfly server context its execution occurs normally.
> Apparently the call getEntityManager.().merge(obj) attempts infinite selects to sync the object with transaction context before doing the merge.
> Attach the source code of my test classes.



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