I'm using Neo4J 2.1.5 with SDN 3.2.0.RELEASE and Spring 4.1.1.RELEASE
One repository contains a derived query:
Landscape getLandscapeByuuid(String landscapeUUID);
Intermittently (and it is -- some calls to this method return the appropriate object, some generate the error below, without any changes to the database between calls), I get a loooong Error stack trace, which starts:
Caused by: java.lang.StackOverflowError: null
at org.neo4j.kernel.impl.core.NodeImpl.getAllRelationshipsOfType(NodeImpl.java:181) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.core.NodeImpl.getRelationships(NodeImpl.java:241) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.api.store.PersistenceCache.nodeGetRelationships(PersistenceCache.java:200) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.api.store.CacheLayer.nodeListRelationships(CacheLayer.java:451) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.api.StateHandlingStatementOperations.nodeGetRelationships(StateHandlingStatementOperations.java:903) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.api.ConstraintEnforcingEntityOperations.nodeGetRelationships(ConstraintEnforcingEntityOperations.java:358) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.api.OperationsFacade.nodeGetRelationships(OperationsFacade.java:174) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.core.NodeProxy.getRelationships(NodeProxy.java:170) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.core.NodeProxy.getRelationships(NodeProxy.java:161) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.kernel.impl.core.NodeProxy.getRelationships(NodeProxy.java:76) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.springframework.data.neo4j.fieldaccess.RelationshipHelper.getRelationships(RelationshipHelper.java:182) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.fieldaccess.RelatedToViaCollectionFieldAccessorFactory$RelatedToViaCollectionFieldAccessor.loadRelationshipEntities(RelatedToViaCollectionFieldAccessorFactory.java:133) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.fieldaccess.RelatedToViaCollectionFieldAccessorFactory$RelatedToViaCollectionFieldAccessor.getValue(RelatedToViaCollectionFieldAccessorFactory.java:120) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.fieldaccess.DefaultEntityState.getValue(DefaultEntityState.java:97) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyEntityStatePropertyValue(SourceStateTransmitter.java:90) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.access$000(SourceStateTransmitter.java:40) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter$2.doWithAssociation(SourceStateTransmitter.java:61) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociations(BasicPersistentEntity.java:324) ~[spring-data-commons-1.9.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyPropertiesFrom(SourceStateTransmitter.java:57) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.Neo4jEntityFetchHandler.fetchValue(Neo4jEntityFetchHandler.java:75) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.Neo4jEntityFetchHandler.fetch(Neo4jEntityFetchHandler.java:68) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl$1.doWithAssociation(Neo4jEntityConverterImpl.java:135) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociations(BasicPersistentEntity.java:324) ~[spring-data-commons-1.9.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.cascadeFetch(Neo4jEntityConverterImpl.java:125) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.loadEntity(Neo4jEntityConverterImpl.java:114) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.Neo4jEntityConverterImpl.read(Neo4jEntityConverterImpl.java:104) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister$CachedConverter.read(Neo4jEntityPersister.java:170) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.Neo4jEntityPersister.createEntityFromState(Neo4jEntityPersister.java:192) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.Neo4jTemplate.createEntityFromState(Neo4jTemplate.java:224) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.fieldaccess.GraphBackedEntityIterableWrapper.underlyingObjectToObject(GraphBackedEntityIterableWrapper.java:41) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.fieldaccess.GraphBackedEntityIterableWrapper.underlyingObjectToObject(GraphBackedEntityIterableWrapper.java:27) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.neo4j.helpers.collection.IterableWrapper$MyIteratorWrapper.underlyingObjectToObject(IterableWrapper.java:57) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.helpers.collection.IteratorWrapper.next(IteratorWrapper.java:47) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.helpers.collection.IteratorUtil.addToCollection(IteratorUtil.java:382) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.neo4j.helpers.collection.IteratorUtil.addToCollection(IteratorUtil.java:461) ~[neo4j-kernel-2.1.5.jar:2.1.5]
at org.springframework.data.neo4j.fieldaccess.RelatedToViaCollectionFieldAccessorFactory$RelatedToViaCollectionFieldAccessor.getValue(RelatedToViaCollectionFieldAccessorFactory.java:122) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.fieldaccess.DefaultEntityState.getValue(DefaultEntityState.java:97) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.copyEntityStatePropertyValue(SourceStateTransmitter.java:90) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter.access$000(SourceStateTransmitter.java:40) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.neo4j.support.mapping.SourceStateTransmitter$2.doWithAssociation(SourceStateTransmitter.java:61) ~[spring-data-neo4j-3.2.0.RELEASE.jar:na]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithAssociations(BasicPersistentEntity.java:324) ~[spring-data-commons-1.9.0.RELEASE.jar:na]
(full dump at http://pastebin.com/k9iMc0cU)
Relevant domain object is Landscape -- It is very simple. I've included its superclasses and inherited interfaces also. The important question I have is... why is the above error intermittent -- what I normally see is that the first two calls to that method will generate the error, with he third and subsequent ones succeeding... some caching issues in neo4j, maybe?
public class Landscape extends GenericPublication {
private String comments;
public String getComments() {
return comments;
}
public void setComments(String comments) {
this.comments = comments;
}
}
public interface IPublication {
public Set<Syndication> getSyndications();
public String getUuid();
public void setComments(String comments);
public void setName(String name);
public void setSyndications(Set<Syndication> syndications);
public void setUuid(String uuid);
}
@NodeEntity
@XmlAccessorType(XmlAccessType.NONE)
public class GenericPublication implements IPublication {
@Fetch
@XmlElement
@RelatedTo(type = "SYNDICATES_TO", direction = Direction.INCOMING)
Set<ArticleCollection> articleCollections = new HashSet<ArticleCollection>();
@Fetch
@XmlElement
String comments;
@Fetch
@XmlElement
String name;
@GraphId
@Fetch
Long nodeId;
@Fetch
@RelatedToVia(type = "SYNDICATES_TO", direction = Direction.INCOMING)
Set<Syndication> syndications;
@Fetch
@XmlElement
@Indexed
String uuid;
public String getComments() {
return comments;
}
public String getName() {
return name;
}
public Set<Syndication> getSyndications() {
return syndications;
}
public String getUuid() {
return uuid;
}
public void setComments(String comments) {
this.comments = comments;
}
public void setName(String name) {
this.name = name;
}
public void setSyndications(Set<Syndication> syndications) {
this.syndications = syndications;
}
public void setUuid(String uuid) {
this.uuid = uuid;
}
}
@RelationshipEntity(type = "SYNDICATES_TO")
public class Syndication {
@GraphId
Long nodeId;
@Fetch
@StartNode
@Indexed
ArticleCollection articleCollection;
@Fetch
@EndNode
@Indexed
GenericPublication publication;
@Fetch
@Indexed
String uuid;
@Fetch
Set<String> categories;
public Set<String> getCategories() {
return categories;
}
public void setCategories(Set<String> categories) {
this.categories = categories;
}
public String getUuid() {
return uuid;
}
public void setUuid(String uuid) {
this.uuid = uuid;
}
public Long getNodeId() {
return nodeId;
}
public void setNodeId(Long nodeId) {
this.nodeId = nodeId;
}
public ArticleCollection getArticleCollection() {
return articleCollection;
}
public void setArticleCollection(ArticleCollection articleCollection) {
this.articleCollection = articleCollection;
}
public GenericPublication getPublication() {
return publication;
}
public void setPublication(GenericPublication publication) {
this.publication = publication;
}
}
Any ideas what's the problem here? This is such a straightforward use-case that I'm bemused where to look...
