CODEWITHSUNDEEP
ontologysemantic-webgraphdbrdf4j
zoe vas
zoe vas

Reputation: 391

A command from the RDF4J framework is throwing an error

When running the following commands, an error is thrown by the add command. The rdf4j framework is used for communicating with a graphdb Knowledge Base:

 import org.eclipse.rdf4j.model.Model;

Model model;
//statements have been added to the model

 public RepositoryConnection connection;
 ...
 connection.add(model); <-- error is thrown

An error is thrown in add command

2022-01-24 09:46:02 [http-nio-8080-exec-5] ERROR restapi.SubmitRMService - unable to rollback transaction. HTTP error code 404
org.eclipse.rdf4j.repository.RepositoryException: unable to rollback transaction. HTTP error code 404
        at org.eclipse.rdf4j.http.client.RDF4JProtocolSession.rollbackTransaction(RDF4JProtocolSession.java:786)
        at org.eclipse.rdf4j.repository.http.HTTPRepositoryConnection.rollback(HTTPRepositoryConnection.java:354)
        at org.eclipse.rdf4j.repository.base.AbstractRepositoryConnection.conditionalRollback(AbstractRepositoryConnection.java:335)
        at org.eclipse.rdf4j.repository.base.AbstractRepositoryConnection.add(AbstractRepositoryConnection.java:379)

The code is running successfully in two other environments except one we are setting with kubernetes. We ensured that /opt/graphdb/home has write permissions.

Question: I just do not understand the 404 RepositoryException error. The code can successfully run queries before the .add(model), so the connection with the graphdb is ok.

Upvotes: 0

Views: 317

Answers (0)

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