Neo.DatabaseError.Statement.ExecutionFailure: relation X removed

I create a principal node in neo4j and create its link to the School, it works and the main object and the relationship successfully created in neo4j.

SchoolHasPrincipal school_has_principle = new SchoolHasPrincipal(school, principal);
principal.setHasPrincipalRelationship(school_has_principle);
Principal newPrincipal = principalDao.create(principal);
System.out.println("principal created>>"+newPrincipal.getId());
SchoolHasPrincipal shp = schoolHasPrincipalDao.create(school_has_principle);
System.out.println("relationship created>>"+shp.getId());

      

        
        
        
      

    

but after working sometimes, it gives error

Execution exception [[CypherTransactionExecutionException: error executing cypher statements [{Code = Neo.DatabaseError.Statement.ExecutionFailure, message = Relationship 2375 has been removed, stackTrace = java.lang.IllegalStateException: Relationship 2375 has been removed \ n \ tat org.neo4j.kernel .impl.api.StateHandlingStatementOperations.relationshipGetAllProperties (StateHandlingStatementOperations.java:824) \ n \ tat org.neo4j.kernel.impl.api.ConstraintEnforcingEntityOperations.relationshipGetAllProperties .api.OperationsFacade.relationshipGetAllProperties (OperationsFacade.java:262) \ n \ tat org.neo4j.kernel.impl.core.RelationshipProxy.getPropertyKeys (RelationshipProxy.java:156) \ n \ tat org.neo4j.server.server. .Neo4jJsonCodec.writePropertyContainer (Neo4jJsonCodec.java:120) \ n \ tat org.neo4j.server.rest.transactional.Neo4jJsonCodec.writeValue (Neo4jJsonCodec.java:41) \ n \ tat org.codehaus.jackson.impl.JsonGeneratorBase.writeObject (JsonGeneratorBase.java:314) .ver4o4o rest.transactional.RowWriter.write (RowWriter.java:37) \ n \ tat org.neo4j.server.rest.transactional.AggregatingWriter.write (AggregatingWriter.java:41) \ n \ tat org.neo4j.server.rest. transactional.ExecutionResultSerializer.writeRows (ExecutionResultSerializer.java:298) \ n \ tat org.neo4j.server.rest.transactional.ExecutionResultSerializer.statementResult (ExecutionResultSerializer.javao:104) \ n \ tat. TransactionHandle.executeStatements (TransactionHandle.java:278) \ n \ tat org.neo4j.server.rest.transactional.TransactionHandle.execute (TransactionHandle.java:207) \ n \ tat org.neo4j.server.rest.transactional.TransactionHexecute (TransactionHandle.java:90) \ n \ tat org.neo4j.server.rest.web.TransactionalService $ 1.Record (TransactionalService.java:180) \ n \ tat com.sun.jersey.core.impl.provider.entity .StreamingOutputProvider.writeTo (StreamingOutputProvider.java:71) \ n \ tat com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo (StreamingOutputProvider.java:57) \ n \ tat com.sun.jersey. .container.ContainerResponse.write (ContainerResponse.java:306) \ n \ tat com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest (WebApplicationImpl.java:1437)\pattern com.sun.jersey.server .impl.application.WebApplicationImpl.handleRequest (WebApplicationImpl.java:1349) \ n \ tat com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest (WebApplicationImpl.java:1339) \ n \ tat com.sun.jersey .spi.container.servlet.WebComponent.service (WebComponent.java:416) \ n \ tat com.sun.jersey.spi.container.servlet.ServletContainer.service (ServletContainer.java:537) \ n \ tat com.sun.jersey.spi.container.servlet.ServletContainer.service (ServletContainer. java: 699) \ n \ tat javax.servlet.http.HttpServlet.service (HttpServlet.java:848) \ n \ tat org.eclipse.jetty.servlet.ServletHolder.handle (ServletHolder.java:698) \ n \ tat org.eclipse.jetty.servlet.ServletHandler.doHandle (ServletHandler.java:505) \ n \ tat org.eclipse.jetty.server.session.SessionHandler.doHandle (SessionHandler.java:211) \ n \ tat org.eclipse. jetty.server.handler.ContextHandler.doHandle (ContextHandler.java:1096) \ n \ tat org.eclipse.jetty.servlet.ServletHandler.doScope (ServletHandler.java:432) \ n \ tat org.eclipse.jetty.server. session.SessionHandler.doScope (SessionHandler.java:175) \ n \ tat org.eclipse.jetty.server.handler.ContextHandler.doScope (ContextHandler.java:1030) \ n \ tat org.eclipse.jetty.server.handler.ScopedHandler.handle (ScopedHandler.java:136) \ n \ tat org.eclipse.jetty.server.handler.HandlerList.handle (HandlerList.java:52) \ n \ tat org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:97) \ n \ tat org.eclipse.jetty.server.Server.handle (Server.java:445) \ n \ tat org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:268) \ n \ tat org.eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:229) \ n \ tat org.eclipse.jetty. io.AbstractConnection $ ReadCallback.run (AbstractConnection.java:358) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:601) \ n \ tat org.eclipse.jetty.util. thread.QueuedThreadPool $ 3.run (QueuedThreadPool.java:532) \ n \ tat java.lang.Thread.run (Thread.java:745) \ n}]]]136) \ n \ tat org.eclipse.jetty.server.handler.HandlerList.handle (HandlerList.java:52) \ n \ tat org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:97) \ n \ tat org.eclipse.jetty.server.Server.handle (Server.java:445) \ n \ tat org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:268) \ n \ tat org. eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:229) \ n \ tat org.eclipse.jetty.io.AbstractConnection $ ReadCallback.run (AbstractConnection.java:358) \ n \ tat org.eclipse.jetty. util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:601) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool $ 3.run (QueuedThreadPool.java:532) \ n \ tat java.lang.Thread.run (Thread.java:745)\}]]]136) \ n \ tat org.eclipse.jetty.server.handler.HandlerList.handle (HandlerList.java:52) \ n \ tat org.eclipse.jetty.server.handler.HandlerWrapper.handle (HandlerWrapper.java:97) \ n \ tat org.eclipse.jetty.server.Server.handle (Server.java:445) \ n \ tat org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:268) \ n \ tat org. eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:229) \ n \ tat org.eclipse.jetty.io.AbstractConnection $ ReadCallback.run (AbstractConnection.java:358) \ n \ tat org.eclipse.jetty. util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:601) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool $ 3.run (QueuedThreadPool.java:532) \ n \ tat java.lang.Thread.run (Thread.java:745)\}]]]java: 97) \ n \ tat org.eclipse.jetty.server.Server.handle (Server.java:445) \ n \ tat org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:268) \ n \ tat org.eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:229) \ n \ tat org.eclipse.jetty.io.AbstractConnection $ ReadCallback.run (AbstractConnection.java:358) \ n \ tat org. eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:601) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool $ 3.run (QueuedThreadPool.java:532) \ n \ tat java.lang .Thread.run (Thread.java:745) \ n}]]]java: 97) \ n \ tat org.eclipse.jetty.server.Server.handle (Server.java:445) \ n \ tat org.eclipse.jetty.server.HttpChannel.handle (HttpChannel.java:268) \ n \ tat org.eclipse.jetty.server.HttpConnection.onFillable (HttpConnection.java:229) \ n \ tat org.eclipse.jetty.io.AbstractConnection $ ReadCallback.run (AbstractConnection.java:358) \ n \ tat org. eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:601) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool $ 3.run (QueuedThreadPool.java:532) \ n \ tat java.lang .Thread.run (Thread.java:745) \ n}]]]358) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:601) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool $ 3.run (QueuedThreadPool.java"32 ) \ n \ tat java.lang.Thread.run (Thread.java:745) \ n}]]]358) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:601) \ n \ tat org.eclipse.jetty.util.thread.QueuedThreadPool $ 3.run (QueuedThreadPool.java"32 ) \ n \ tat java.lang.Thread.run (Thread.java:745) \ n}]]]

tell me if you want some more of my code.