SDN: Error when persisting to REST database (cross-store)

**andrewcelerity** · Nov 21st, 2011, 09:12 AM

I'm getting an error when persisting an entity to the REST database. It happens when trying to create an index to the entity I'm storing.

Code:

java.lang.RuntimeException: Error adding element 73 foreignId com.domain.identity.Identity:18 to index Identity
	org.neo4j.rest.graphdb.RestAPI.addToIndex(RestAPI.java:331)
	org.neo4j.rest.graphdb.index.RestIndex.add(RestIndex.java:57)
	org.springframework.data.neo4j.cross_store.support.node.CrossStoreNodeEntityState.persistForeignId(CrossStoreNodeEntityState.java:102)
	org.springframework.data.neo4j.cross_store.support.node.CrossStoreNodeEntityState.createAndAssignState(CrossStoreNodeEntityState.java:69)
	org.springframework.data.neo4j.cross_store.support.node.CrossStoreNodeEntityState.persist(CrossStoreNodeEntityState.java:86)
	org.springframework.data.neo4j.cross_store.support.node.CrossStoreNodeEntityState.persist(CrossStoreNodeEntityState.java:1)
	org.springframework.data.neo4j.fieldaccess.DetachedEntityState.persist(DetachedEntityState.java:273)
	org.springframework.data.neo4j.aspects.support.node.Neo4jNodeBacking.ajc$interMethod$org_springframework_data_neo4j_aspects_support_node_Neo4jNodeBacking$org_springframework_data_neo4j_aspects_core_NodeBacked$persist(Neo4jNodeBacking.aj:132)
	com.domain.identity.Identity.persist(Identity.java:1)

The entity is persisted to JPA and flushed.

There's no source for org.neo4j.rest.graphdb.RestAPI to step through on the debugger so I'm not sure what's causing the exception (and the message doesn't give any hints either). The API is getting the proper string to index. I don't see anything in the server log, but I'm not quite sure if there's a good way to bump up the logging to see if there's something on the server end I could see.

Thanks.

Edit: I am able to write to the index via REST through a PHP service.

**MichaelHunger** · Nov 21st, 2011, 09:38 AM

The source for RestAPI is here: https://github.com/neo4j/java-rest-binding

Can you also have a look at the servers' graph.db/messages.log ?

Otherwise is it possible to extract the Test to a small sample project?

Or at least provide the code snippets for your entity and the code that is calling the persist() ?

Thanks a lot

**andrewcelerity** · Nov 21st, 2011, 09:59 AM

Here's what I get from the debugger as the status when it tries to post

Code:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
<title>Error 405 Method Not Allowed</title>
</head>
<body><h2>HTTP ERROR 405</h2>
<p>Problem accessing /db/data/index/node/Identity. Reason:
<pre>    Method Not Allowed</pre></p><hr /><i><small>Powered by Jetty://</small></i><br/>                                                
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</body>
</html>

Does that tell you anything?

Edit: btw, there was nothing odd in the messages.log file

**andrewcelerity** · Nov 22nd, 2011, 11:07 AM

Here's some code snippets. They're pretty simple, I'm not doing anything out of the ordinary

Model with extraneous JPA properties snipped out:

Code:

@Entity
@Table(name="identity")
@NodeEntity(partial=true)
public class Identity {
	@Id
	@Column
	@GeneratedValue(strategy=GenerationType.AUTO)
	protected int id;
	
	/**
	 * Name displayed on identity view
	 */
	@Column(length=80)
	protected String displayName;
	
	/**
	 * Copy of displayName for raw graph queries
	 */
	@GraphProperty
	@Transient
	String graphName;
	
	
	@RelatedTo(elementClass=Identity.class, type="FRIENDS", direction=Direction.BOTH)
	Set<Identity> friends;
...

DAO, the persist method calls a parent persit method which is just a wrapper around entityManager.persist() (same thing with flush()). This is being called from a controller method that just instantiates a new Identity, sets a couple of values, they persists it.

Code:

        public void persist(Identity entity) {
		super.persist(entity);
		this.flush();
		entity.persist();
	}

**MichaelHunger** · Nov 23rd, 2011, 02:13 AM

It tells me that the way it tries to post to the index is (no longer) valid.

What versions are you running:

* neo4j server
* spring data neo4j

Thanks a lot

Michael

**andrewcelerity** · Nov 23rd, 2011, 08:38 AM

neo4j server: 1.5.M01
spring data neo4j: 2.0 RC1

edit: I am able to post to that index via PHP.

**MichaelHunger** · Nov 23rd, 2011, 09:08 AM

Could you update your server to 1.5.M02 and try it again? Or run it against a test server running 1.5.M02 or 1.5 ?

Thanks a lot

Michael

**andrewcelerity** · Nov 23rd, 2011, 09:38 AM

I got 1.5 GA and that worked. Strange.

Thanks for your help.

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