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Questions tagged [nebula-graph]

NebulaGraph is an open source graph database solution. Use this tag for any questions that relate to using NebulaGraph as the database of your project. Any bugs or feature requests should be reported through the Nebula Graph GitHub issue tracker.

NebulaGraph is an open-source distributed graph database solution.

Use this tag for any questions relating to using NebulaGraph as your project's graph database. Any bugs or feature requests should be reported through the NebulaGraph GitHub issue tracker.

Find more about NebulaGraph Database at:

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After executing the compaction operation for a period of time, write blocking may occur in NebulaGraph Database

The version of Nebula is v3.2.0 and it is deployed as a standalone instance using Docker. The hardware information is as follows: 200G HDD disk, 32C 32G CPU and memory information. I have made some modifications to the parameters, but the rest are…
Lisa Liu
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Can the results of "find path" be modified in NebulaGraph Database?

As for the question, can the "find path" results be further split to only take the edge or vertex? FIND { SHORTEST | ALL | NOLOOP } PATH [WITH PROP] FROM TO OVER [REVERSELY | BIDIRECT] [
Lisa Liu
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What does "the maximum amount of vertex data that can be written to NebulaGraph Database in a single write in batch in exchange" mean?

In the application.cnf configuration file of exchange, there is a parameter "batch" for configuring tags. It is explained as follows: # Indicate the data source's data delimiter, which defaults to the comma (,). separator: "," # Set…
Lisa Liu
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NebulaGraph Database: the nebula-spark-connector encountered an error while importing data

The NebulaGraph version is 3.7.0, deployed in a distributed manner and installed using RPM. The problem is that the nebula-spark-connector encountered an error while importing data: java.util.NoSuchElementException: key not found: interface. The…
Lisa Liu
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Error occurred when writing edge data from Spark to NebulaGraph Database

The NebulaGraph Database version is 3.4.0. It is deployed in a distributed manner and installed via RPM. It is already in production environment. There are three machines with CPU(24) and memory 251. The problem is that Spark can read CSV data…
Lisa Liu
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There is a problem with the nebula-python connection being repeatedly refused in NebulaGraph Database

I have found this problem in the community, but the symptoms are different from mine: https://discuss.nebula-graph.com.cn/t/topic/6736 When using Python to connect to Nebula running on a Docker on a virtual machine, an error occurs. The program is…
Lisa Liu
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There are issues with creating and rebuilding indexes after inserting data using nebula-python in NebulaGraph Database

It seems that the program needs to be run three times before a successful query can be made. Each time, the node and relationship edge statistics are normal. However, during querying, the results are sometimes normal and sometimes abnormal. At…
Lisa Liu
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17:19Issue with com.vesoft.client dependency package in NebulaGraph Database

My dependency version is 3.4.1 (I've also tried 3.4.0 and 3.5.0). When I try to use the Driver to establish a connection, I get the following error Screenshot of the method call included. Additionally, my project also includes ngbatis.
Lisa Liu
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How to split characters for comparison in NebulaGraph database?

In the Tag attribute of Nebula2.5.1, there is a character type field called system_version. When querying, it is necessary to compare system_version. The field is separated by commas. The following cases need to return true: "12.2.1" <=…
Lisa Liu
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Queries for edges at the specified node often result in timeouts in NebulaGraph Database

I'm currently facing a situation where when querying the incoming and outgoing data (edges) of a certain node, if the number of edges exceeds a certain limit, such as 1000, it easily results in a timeout error. At the same time, RPC timeouts occur…
Lisa Liu
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The nebula console is unable to access the graph in NebulaGraph Database

The version of Nebula Studio is v3.7.0, the kernel version is v3.5.0, and it is deployed as a Windows standalone using Docker Desktop for installation. After installing nebula-docker-compose, all containers start normally without any problems.…
Lisa Liu
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NebulaGraph Database: the compilation of nebula-cpp client failed and I want to restore it

Nebula version is v3.5.0. Deployment is standalone. Installation is RPM. It has been deployed in a production environment. The problem I encountered is as follows: Compilation of nebula-cpp client fails. I have identified the issue to be the missing…
Lisa Liu
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When importing data from Spark to NebulaGraph Database, an error occurred

The version of Nebula is v3.4.0. It is deployed in a distributed manner and installed via RPM. It has already been deployed to the production environment. The CPU and memory information are three machines with CPU (24) and memory of 251. Problem…
Lisa Liu
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NebulaGraph Database: ngql match encountered problems with matching variable-length paths that contain loops

Deployment method is distributed, installation method is RPM, and it has been deployed to the production environment. The problem is related to meta/storage/graph info logs. The query is: MATCH p=(v:player{name:“Tim…
Lisa Liu
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Backing up Nebula Studio Draft Schema with its drag and drop features

I have a Nebula studio instance running on its default port of 7001. I have a Draft Schema that several of us are editing and we have already managed to accidentally overwrite /lose changes. I can see there is a directory called:…
Toby Derrum
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