Neoclipse Exception - Database Error - neo4j

I have created nodes and relationships in java using Neo4j jars,I am trying to display the same from Neoclipse,
I am getting Exception when trying to create connection from Neoclipse to the folder created by java program (I am using windows 7) .
Exception:
java.lang.IllegalStateException:Mismatching store version found(v0.A.1 while expecting v0.A.0)
and the store is not cleanly shutdown.
Recover the database with previous database version and then attempt to upgrade .
after this i added graphDb.shutdown(); code then i got different exception:
org.neo4j.kernel.impl.storemigration.StoreUpgrader$UnableToUpgradeException:
Not all store Files match the version required for successful upgrade.
List of jar Files:
geronimo-jta_1.1_spec-1.1.1.jar
lucene-core-3.6.2.jar
neo4j-2.0.1.jar
neo4j-cypher-2.0.1.jar
neo4j-graph-algo-2.0.1.jar
neo4j-graph-matching-2.0.1.jar
neo4j-jmx-2.0.1.jar
neo4j-kernel-2.0.1.jar
neo4j-lucene-index-2.0.1.jar
neo4j-udc-2.0.1.jar
Please guide me.

It looks like you've created your datastore with Neo4j 2.0.1. Neoclipse seems to use an earlier version. Datastore downgrades are not supported.
However you could drop your database into a Neo4j 2.0.1 server and connect to it remotely using Neoclipse.

Related

Neo.TransientError.Database.DatabaseUnavailable | Database 'graph.db' is unavailable

I am trying to import the Hetionet into the Neo4j and I follow the guidiance below:
https://github.com/hetio/hetionet/tree/master/hetnet/neo4j
While using the command
curl --insecure --location https://github.com/hetio/hetionet/raw/master/hetnet/neo4j/hetionet-v1.0.db.tar.bz2 | tar --extract --bzip2
The error “curl: (23) Failure writing output to destination” has been thrown.
Therefore I just downloaded the file directly and moved to the directory ".Neo4jDesktop\relate-data\dbmss\dbms-0d0d3324-d1a6-4d3e-b82c-0c4451a8c880\data\databases"
After I started the database, It showed that this database is currently offline. When I trying to do some operations to it, the error "Neo.TransientError.Database.DatabaseUnavailable" has been shown.
Some valuable informations in the log file debug.log are as below:
2022-07-19 23:11:53.896+0000 ERROR [c.n.d.DbmsReconciler] Encountered error when attempting to reconcile database graph.db (request by SystemGraph:1) to state 'online', database remains in state 'offline'
org.neo4j.dbms.api.DatabaseManagementException: Unable to start database DatabaseId{7a8c6b65[graph.db]}
Caused by: org.neo4j.kernel.lifecycle.LifecycleException: Component 'org.neo4j.kernel.database.Database#3da82075' was successfully initialized, but failed to start. Please see the attached cause exception "Unknown store version 'v0.A.7'".
The version of the dump you are trying to import is pretty old. From the readme
The database has been migrated to the Neo4j 3.0.1 Community Edition.
If you use a current 4.4 version of the database, the only thing you can do is to cascade through multiple versions and upgrade the store.
I am not yet sure if you really need each minor version to work properly.
Maybe it's already enough to go from 3.0 to 3.5 and follow this guide https://neo4j.com/docs/upgrade-migration-guide/current/migration/migrate-to-4.0/migrate-single-instance/
Otherwise starting 3.1-3.5 with allow_upgrade=true on the stores is the only option I see. There are Docker images available at
https://hub.docker.com/_/neo4j/ also for those older, unsupported versions.
Edit: You should be able to start/upgrade it with 3.3 and then again with 3.5 and then run a 4.4 neo4j-admin copy

Neo4J crashes after installing APOC plugin

I'm trying to install the APOC Full jar file (4.2.0.6) to my Neo4J instance that's running in a Google Compute VM. To do so, I've installed the JAR file from GitHub releases to the /plugins folder. Each time I restart or run the environment it crashes with the following output to logs:
"Some jar procedure files (apoc-4.2.0.6-all.jar) are invalid, see log for details."
There's really no additional details provided...
If I copy the default APOC Core library found withing /labs, it works. I've tried to download this same file from Github and it fails. I've verified that the same user/group permissions are applied to the downloaded file as well.
Any ideas?
This usually happens for two reasons:
First is version mismatch. You can check which version you should use based on the version matrix, which is available at: https://github.com/neo4j-contrib/neo4j-apoc-procedures#version-compatibility-matrix. Unfortunately, it is not always up to date, but the APOC versions are if I understand correctly:
APOC 4.1.x.x -> Neo4j 4.1.x
APOC 4.2.x.x.-> Neo4j 4.2.x
APOC 4.3.x.x -> Neo4j 4.3.x
If I had to guess, you are probably using Neo4j 4.3 or 4.1 and using an APOC that is designed to work with Neo4j 4.2.
The other issue is that sometimes you have multiple APOC plugin files in the plugin folders, so that will also crash Neo4j.

Starting Neo4j failed: unmanaged extensions

I'm trying to create an unmanaged extension using this. I'm currently using a Windows environment
Now, I followed everything and here is what my pom file looks now:
POM
and here is my java class containing the unmanaged extension
HelloWorldResource
Now, I tried to run "**mvn clean package**", and it produced a jar file around 10MB which I then put into the plugins folder of my database.
When I start the server, the following error always appears:
Starting Neo4j failed:
org.neo4j.server.web.NeoServletContainer-49fd135#9bfd861c==org.neo4j.server.web.NeoServletContainer,-1,false
The log file is not useful as it doesn't show any exception that cause the it. Other people also reported the issue in stack overflow and appears to be a jar issue. What else could I have missed?
Neo4j fails to start
Neo4j fails in startup
PS: I'm using 3.0.3 Neo4j Community Edition.

Neo4j restore asks for DB upgrade

I have an instance in AWS hosting a Neo4j DB.
The version im using is 2.3.1.
I backed it up using "neo4j-backup".
I then zipped the files and uploaded to an external storage.
I wanted to restore the DB to another instance I have using the same version (2.3.1), so I copied the files to the same folder the 1st instance is using.
When I run the neo4j console command it states:
ERROR Neo4j cannot be started, because the database files require upgrading and upgrades are disabled in configuration. Please set 'allow_store_upgrade' to 'true' in your configuration file and try again.
Of course the "allow_store_upgrade" is commented out,
Do I have to do the upgrade when restoring?
How can I find the DB version?
If you're using the same version you shouldn't need to comment it out. Though I don't think it would harm anything if you do (especially if you still have that backup somewhere else).
You should be able to find the version of Neo4j in the CHANGES.txt / README.txt files. It should also output the version in data/graph.db/messages.log when you start up the server. Also if you go to the web console (at http://localhost:7474 by default) it will show you the version.

Neo4J 2.0.1 doesn't work with Gephi 0.8.2 and "Neo4J Graph Database Support" plugin

Have the following versions of software:
Neo4J community: 2.0.1
Gephi: 0.8.2-beta
Neo4J Graph Database Support plugin: for Gephi 0.8.2
I'm using the default.graphdb that came with Neo4j 2.0.1 (started playing with Neo4j yesterday)
While doing full import from Gephi using Neo4J plugin I get this error:
Caused by:
org.neo4j.kernel.impl.storemigration.UpgradeNotAllowedByConfigurationException:
Failed to start Neo4j with an older data store version.
To enable automatic upgrade, please set
configuration parameter "allow_store_upgrade=true"
Now, I found neo4j.properties and uncommented the "allow_store_upgrade=true" part, but nothing has changed. I still get the same error. I'm not even sure that it tries to load that neo4j.properties file, because if I rename the file I still get exact error (I'm 100% sure the path is correct).
Edit your neo4j.properties file, uncomment the following line :
allow_store_upgrade=true
This will automatically upgrade your database to support the newer neo4j version

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