[Solved] Look at this elasticsearch.yml snippet:node.roles: master, dataWhat is the problem with this configuration? | Elasticsearch

Elasticsearch - Cluster Management

Look at this elasticsearch.yml snippet:

node.roles: master, data

What is the problem with this configuration?

ARoles must be listed as a YAML list with brackets and quotes

BThe roles "master" and "data" cannot be assigned together

CThe roles should be uppercase

DThe node.roles setting is deprecated

Step-by-Step Solution

Solution:

Step 1: Check YAML syntax for node.roles
Roles must be defined as a list, e.g., ["master", "data"], not as a comma-separated string.
Step 2: Validate role assignment rules
Assigning master and data roles together is allowed; roles are lowercase; node.roles is valid.
Final Answer:
Roles must be listed as a YAML list with brackets and quotes -> Option A
Quick Check:
YAML list syntax required for node.roles [OK]

Quick Trick: Use YAML list syntax: node.roles: ["master", "data"] [OK]

Common Mistakes:

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