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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:

274 questions
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Graph Database Nebula Graph insert record failed but query regular

I'm using the graph database Nebula Graph and encounter that query is regular but always fails when I want to insert records. Here are some logs: root@f10cace4998c logs]# tail -f nebula-graphd.f10cace4998c.root.log.ERROR.20191213-114343.1 E1216…
niania
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‘system_memory_high_watermark_ratio’ in NebulaGraph database 3.4.1 isn't effective

Despite setting this configuration, I'm experiencing Out-of-Memory (OOM) errors, and the system kills the graph process instead of triggering a high watermark error. Could this issue be related to the memory tracker? # if use balance data feature,…
Jian Wang
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Unable to start Docker container after deploying the distributed graphics database system in NebulaGraph database

I have used two servers (demo1 and demo2) to achieve distributed deployment through Docker Swarm. | meta | storag | graph demo1 | meta0 | storag0 | graph demo2 | meta1 | storage1 | ---- demo2 | meta2 | storage2 | ---- After…
Xuemei Tao
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Will deleting and adding tags on the NebulaGraph database reduce query speed

Due to some reasons, I have to first label a large amount of data, and then recalculate the data and re-label based on the new data within a certain period (such as one week). The query I use is as follows: Due to some reasons, I have to first label…
Lu Li
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Processing issues with Neubla3.4.1 upstart statements on the NebulaGraph database

I use the NebulaGrpah version 3.4.1. upsert edge on friend "14"->"15"@31 set descr=SPLIT(descr,",")+",1" The above statement with the prompt "Storage Error: Invalid data, may be wrong value type." indicates that there is an issue with the data being…
Jing Guan
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How to fill in the configuration parameters for NebulaGraph database?

NebulaGraph Importer ：v4 NebulaGraph:3.5.0 about edges enter image description here According to the official website, props is a required field. However, my CSV file only has two columns, which already correspond to src and dst. enter image…
Danmei Li
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Issue with using NebulaGraph database

What are the prerequisites for SHOW QUERIES to produce results? For example, before SHOW STATS, SUBMIT JOB STATUS needs to be executed first. Currently, I have encountered an issue where I am unable to determine which step is causing the…
XiaoXia Liang
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Deployment of NebulaGraph database version 2.6.2 failed

The code was developed in 2021, so the version used is relatively old, please forgive me. Previously, the cluster was successfully deployed on Ubuntu, but today when migrating to CentOS system, an error occurred. We are about to go live. I have…
GraceChaya
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The Problem of Comparing Segmented Characters in the NebulaGraph Database

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.…
Lu Li
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Unable to access NebulaGraph database

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. enter image description…
Jing Guan
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NebulaGraph database client compilation failed. How can I recover it?

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…
Jian Wang
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An error occurred while importing data into the NebulaGraph database

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…
Dongmei He
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NebulaGraph Database: ngql match encountered problems

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…
GraceChaya
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Backing up NebulaGraph database 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:…
XiaoXia Liang
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The NebulaGraph exchange ingestion program is unable to write data

In a NebulaGraph cluster environment, if the disk of a certain storage node becomes full, the exchange ingestion program will be unable to write data. Nebula version: v3.5.0 Deployment mode: Distributed Installation method: Docker In production…
Danmei Li
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