Questions tagged [janusgraph]
JanusGraph is a scalable graph database optimized for storing and querying graphs containing hundreds of billions of vertices and edges distributed across a multi-machine cluster. JanusGraph is a transactional database that can support thousands of concurrent users executing complex graph traversals in real time. When posting questions, please include environment details, such as the storage and indexing backends used.
janusgraph
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gremlinpython writing a helper function to create vertexes if they don't exist, and create an edge between them if it doesn't exist
I'm working with gremlin and gremlinpython for the first time, and I'm hitting a wall when I try to create new vertexes and an edge between them. I've looked at some of the other resources online, but ...
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Hashmap as Property Value in Janusgraph
I use a janusgraph docker container. I connect with it via tinkerpop remote connection in my Java application.
I want to set a hashmap as property value on a specific node. That should be possible ...
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JanusGraph 1.0: Unable to delete nodes
I have JanusGraph 1.0 which has Cassandra as backend server. When trying to drop node using Gremlin console its properties gets removed but the node doesn't get dropped. Also tried dropping using ...
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No logs getting getting logged in log file for gremlin server
This query is regarding the logs that I am not able to get while the janusgraph server start up inside a docker container.
Details below:
I am upgrading janusgraph version - 1.0.0-rc2 from an older ...
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How to create, register and enable an index in Janusgraph?
I want to create an index to find a vertex by label and a property value.
I saw from documentation that i have to Install->Register->Enable the index, but somehow i can't get it to be Register ...
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Problem installing hadoop-gremlin with janusgraph
We are running into some issues while launching gremlin.sh with hadoop (ref: https://tinkerpop.apache.org/docs/current/reference/#hadoop-gremlin) using janusgraph.
Any tips/help appreciated! Thanks!
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Remote Gremlin Server and Concurrent Requests for Janus Graph
I am using Embedded Gremlin Server with Janus Graph but I have noticed problem with concurrent requests
Consider there are two types of gremlin queries
1- Query that scans related records at hop =1 ...
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janusGraphManagement.getOrCreatePropertyKey() Causing Could not read messages for timestamp
Problem
Why is an empty JanusGraph not able to read messages for timestamp?
What message is JanusGraph referring for janusGraphManagement.getOrCreatePropertyKey()?
How is this warning fixed and why ...
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REGISTER_INDEX() Not Registering SchemaStatus.INSTALLED JanusGraph-Index
Why is JanusGraph not registering an installed-index?
The first time the janusGraphManagement.buildIndex() builds and enables fine.
Although, second time the janusGraphIndex will be stuck at INSTALLED ...
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Cannot SchemaAction.DROP_INDEX() Of JanusGraph-Index With SchemaStatus.DISCARDED
Problem
Why is JanusGraph not dropping a discarded index?
I'm performance-evaluating graph-databases as of their latest releases that meet our needs.
I need to drop to remake the index for JMH testing:...
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Building JanusGraph Indexes On Cassandra In Java
Problem
What are the next steps to complete JanusGraph indices?
I've already tried following line-by-line of the JanusGraph docs;
And tried using closer to source commits janusGraph instead of ...
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How to get a JanusgraphGraph Instance from a remote janusgraph connection
I want to use the management API in my java based application to dynamically create Schemas and to use indices. But I cant find a solution to get the JanusGraph - Graph instance from my remote ...
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Why Is JanusGraph Or Cassandra Getting A Locking Error?
Problem
How do you fix this cascading level of errors when performing sets of drop().iterate() iterations?
[WARN] [o.j.d.l.c.ConsistentKeyLocker.main] :: Lock write succeeded but took too long: ...
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Why Is JanusGraph Throwing So Many TemporaryLockingException?
Problem
How do I release (old) JanusGraph KeyColumn locks?
2023-05-11 12:52:47,609 [INFO] [o.j.d.u.BackendOperation.main] :: Temporary exception during backend operation [CacheMutation]. Attempting ...
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Why Does Limit-OF-1 Not Record-Drop 1 Vertex?
In JanusGraph-Java, how can you limit dropping vertex records?
Here's what the logs show:
drop().iterate() does work for a small number
limit(1).drop() does nothing
drop().limit(1) does nothing
drop()...
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