Re: [Neo] org.neo4j.api.core.NotFoundException: Node[7] not found.
Andreas, NeoIndexService is built managing a tree inside the node space and is based on the MultiValueIndex. Single/multi value indexes works better if you have some specific parts of your domain that needs to be indexed (ex. see Timeline). If you have the index all properties problem we recommend using LuceneIndexService. External search alternatives such as Compass are just as good. Neo4j is a graph database and not a full text search engine so the plan has always been to integrate towards other solutions when needed. Assume LuceneIndexService implementation is thread safe since there is currently some bug in multi value index :) But any public API implementation under org.neo4j.* should be thread safe unless documented otherwise (if not it is considered a bug). -Johan On Thu, May 14, 2009 at 12:14 AM, Andreas Guenther aguent...@flying-orange.com wrote: Johan, Thanks for opening a ticket. What really is the difference between all of the different index implementations and what is the recommendation to use either one? I even found a LuceneFulltextIndexService. We are currently considering the alternative to use Compass for node id indexing. Besides transactional and maybe future Neoclipse search features, is there any reason to not consider Neo external search functionality? I assume all Neo IndexService implementations are thread-safe ;) -Andreas Johan Svensson wrote: Hi Andreas, I was able to reproduce this. If I start from a clean db and only execute those 2 tests over and over again the 4th run will always fail on the multi rollback test. I created a ticket for it https://trac.neo4j.org/ticket/168 and will look into it as soon as possible. Regards, -Johan ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo] org.neo4j.api.core.NotFoundException: Node[7] not found.
Hi,
I am trying to verify simple transactional behavior of EmbeddedNeo
together with NeoIndexService and run into a strange and rather
inconsistent errors. Attached are the relevant parts from a simple Maven
project I used for testing. Simply issue 'mvn archetype:create -e
-DgroupId=com.neo4j.test -DartifactId=transaction' and copy the files
into the respective folders. Note, that the order in how I execute tests
are relevant. Furthermore, I tried this with and without Spring
integration and Neo 1.0-b7, 1.0-b8, and trunk. So, here goes:
[mvn clean install]
This will lead to both test classes failing due to
'org.neo4j.api.core.NotFoundException: Node[7] not found' exception.
[mvn test -Dtest=org.neo4j.test.TransactionRollbackTest]
Same error as above for this test.
[mvn test -Dtest=org.neo4j.test.TransactionCommitTest]
Surprisingly succeeds.
[mvn test -Dtest=org.neo4j.test.TransactionRollbackTest]
Surprisingly succeeds this time.
[mvn clean install]
Surprisingly succeeds this time for all tests.
Here's also a more detailed example of the exception:
org.neo4j.api.core.NotFoundException: Node[7] not found.
at org.neo4j.impl.core.NodeManager.getNodeForProxy(NodeManager.java:431)
at
org.neo4j.impl.core.NodeProxy.getSingleRelationship(NodeProxy.java:98)
at org.neo4j.util.btree.TreeNode.getFirstEntry(TreeNode.java:181)
at org.neo4j.util.btree.TreeNode.getEntry(TreeNode.java:398)
at org.neo4j.util.btree.BTree.getAsKeyEntry(BTree.java:341)
at
org.neo4j.util.index.AbstractIndex.getSingleNodeFor(AbstractIndex.java:393)
at
org.neo4j.util.index.MultiValueIndex.getSingleNodeFor(MultiValueIndex.java:34)
at
org.neo4j.util.index.NeoIndexService.getSingleNode(NeoIndexService.java:140)
at
org.neo4j.test.TransactionRollbackTest.hasNewNode(TransactionRollbackTest.java:66)
at
org.neo4j.test.TransactionRollbackTest.testProgramaticNeoMultiRollback(TransactionRollbackTest.java:32)
As mentioned above already I tried this test scenario with and without
the Spring test integration and arrived at the same results. Can anyone
explain the reason for these inconsistencies or what I am doing wrong?
Help is very much appreciated!
Thank you,
-Andreas
---
package org.neo4j.test;
import org.junit.runner.RunWith;
import org.junit.Test;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.beans.factory.annotation.Autowired;
import org.neo4j.api.core.NeoService;
import org.neo4j.api.core.Node;
import org.neo4j.api.core.Transaction;
import org.neo4j.api.core.RelationshipType;
import org.neo4j.util.index.IndexService;
import static junit.framework.Assert.assertTrue;
import static junit.framework.Assert.fail;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {/applicationContext-test.xml})
public class TransactionCommitTest {
@Autowired
protected NeoService neoService = null;
@Autowired
protected IndexService neoIndexService = null;
@Test
public void testProgramaticNeoMultiCommit() {
String testValue = String.valueOf(System.nanoTime());
assertTrue(No node expected, !hasNewNode(testValue));
insertNewNodeAndCommit(testValue);
assertTrue(Node expected, hasNewNode(testValue));
testValue = String.valueOf(System.nanoTime());
assertTrue(No node expected, !hasNewNode(testValue));
insertNewNodeAndCommit(testValue);
assertTrue(Node expected, hasNewNode(testValue));
}
private void insertNewNodeAndCommit(String testValue) {
Transaction tx = null;
try {
tx = neoService.beginTx();
Node newNode = neoService.createNode();
newNode.setProperty(id, testValue);
neoService.getReferenceNode().createRelationshipTo(newNode,
NeoRelationshipTypes.LINKS_TO);
neoIndexService.index(newNode, id, testValue);
tx.success();
} catch (Exception e) {
e.printStackTrace();
fail();
} finally {
tx.finish();
}
}
private boolean hasNewNode(String testValue) {
Transaction tx = null;
Node node = null;
try {
tx = neoService.beginTx();
node = neoIndexService.getSingleNode(id, testValue);
tx.success();
} finally {
tx.finish();
}
return node != null;
}
public static enum NeoRelationshipTypes implements RelationshipType {
LINKS_TO
}
}
---
package org.neo4j.test;
import org.junit.runner.RunWith;
import org.junit.Test;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.beans.factory.annotation.Autowired;
import org.neo4j.api.core.NeoService;
import
Re: [Neo] org.neo4j.api.core.NotFoundException: Node[7] not found.
Hi Andreas, I was able to reproduce this. If I start from a clean db and only execute those 2 tests over and over again the 4th run will always fail on the multi rollback test. I created a ticket for it https://trac.neo4j.org/ticket/168 and will look into it as soon as possible. Regards, -Johan On Wed, May 13, 2009 at 8:40 PM, Andreas Guenther aguent...@flying-orange.com wrote: Hi, I am trying to verify simple transactional behavior of EmbeddedNeo together with NeoIndexService and run into a strange and rather inconsistent errors. Attached are the relevant parts from a simple Maven project I used for testing. Simply issue 'mvn archetype:create -e -DgroupId=com.neo4j.test -DartifactId=transaction' and copy the files into the respective folders. Note, that the order in how I execute tests are relevant. Furthermore, I tried this with and without Spring integration and Neo 1.0-b7, 1.0-b8, and trunk. So, here goes: ... ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo] org.neo4j.api.core.NotFoundException: Node[7] not found.
Johan, Thanks for opening a ticket. What really is the difference between all of the different index implementations and what is the recommendation to use either one? I even found a LuceneFulltextIndexService. We are currently considering the alternative to use Compass for node id indexing. Besides transactional and maybe future Neoclipse search features, is there any reason to not consider Neo external search functionality? I assume all Neo IndexService implementations are thread-safe ;) -Andreas Johan Svensson wrote: Hi Andreas, I was able to reproduce this. If I start from a clean db and only execute those 2 tests over and over again the 4th run will always fail on the multi rollback test. I created a ticket for it https://trac.neo4j.org/ticket/168 and will look into it as soon as possible. Regards, -Johan On Wed, May 13, 2009 at 8:40 PM, Andreas Guenther aguent...@flying-orange.com wrote: Hi, I am trying to verify simple transactional behavior of EmbeddedNeo together with NeoIndexService and run into a strange and rather inconsistent errors. Attached are the relevant parts from a simple Maven project I used for testing. Simply issue 'mvn archetype:create -e -DgroupId=com.neo4j.test -DartifactId=transaction' and copy the files into the respective folders. Note, that the order in how I execute tests are relevant. Furthermore, I tried this with and without Spring integration and Neo 1.0-b7, 1.0-b8, and trunk. So, here goes: ... ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user ___ Neo mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
