---
title: "changeWorkerNodeCount"
slug: "analytics-cloudhadoop-changeworkernodecount"
tags: ["Cloud Hadoop"]
updated: 2026-09-17T09:48:02Z
published: 2026-09-17T09:48:02Z
canonical: "api.ncloud-docs.com/analytics-cloudhadoop-changeworkernodecount"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# changeWorkerNodeCount

Available in Classic

Change the number of worker nodes in a Cloud Hadoop cluster.

## Request

This section describes the request format. The method and URI are as follows:

| Method | URI |
| --- | --- |
| GET \| POST | /hadoop/v2/changeWorkerNodeCount |

Note

This guide is based on the GET method. POST method call tests can be performed through Swagger in the API Gateway service of the NAVER Cloud Platform console.

### Request headers

For information about the headers common to all Cloud Hadoop APIs, see [Cloud Hadoop request headers](/docs/en/analytics-cloudhadoop#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### Request query parameters

You can use the following query parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `cloudHadoopInstanceNo` | String | Required | Cluster instance number - See [getCloudHadoopInstanceList](/docs/en/analytics-cloudhadoop-getcloudhadoopinstancelist). |
| `workerNodeCount` | Integer | Required | Number of worker nodes - Up to 10 can be added or removed at a time. - Call multiple times to add or remove 11 or more. |
| `responseFormatType` | String | Optional | Format of the response data - `xml` (default) \| `json` |

### Request example

The request example is as follows:

```
curl --location --request GET 'https://ncloud.apigw.ntruss.com/hadoop/v2/changeWorkerNodeCount
?cloudHadoopInstanceNo=2777****
&workerNodeCount=3
&responseFormatType=json' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}' \
--header 'x-ncp-apigw-api-key: {API Key}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `changeWorkerNodeCountResponse` | Object | - | Response result |
| `changeWorkerNodeCountResponse.totalRows` | Integer | - | Number of response results |
| `changeWorkerNodeCountResponse.cloudHadoopInstanceList` | Array | - | Cluster list: [cloudHadoopInstanceList](/docs/en/analytics-cloudhadoop-changeworkernodecount#cloudHadoopInstanceList) |
| `changeWorkerNodeCountResponse.requestId` | String | - | ID for the request - UUID format |
| `changeWorkerNodeCountResponse.returnCode` | String | - | Response code |
| `changeWorkerNodeCountResponse.returnMessage` | String | - | Response message |

#### `cloudHadoopInstanceList`

The following describes `cloudHadoopInstanceList`.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `cloudHadoopInstanceNo` | String | - | Cluster instance number |
| `cloudHadoopClusterName` | String | - | Cluster name |
| `cloudHadoopImageProductCode` | String | - | Cluster image code |
| `cloudHadoopClusterType` | Object | - | Cluster type information |
| `cloudHadoopClusterType.code` | String | - | Cluster type code - `CHADP` \| `HBASE` \| `SPARK` \| `PRESTO` - `CHADP`: Core Hadoop - `HBASE`: HBase - `SPARK`: Spark - `PRESTO`: Presto |
| `cloudHadoopClusterType.codeName` | String | - | Cluster type code name |
| `masterNodeCpuCount` | Integer | - | Number of master node CPUs |
| `masterNodeCount` | Integer | - | Number of master nodes |
| `masterNodeMemorySize` | Integer | - | Master node memory capacity (byte) |
| `workerNodeCpuCount` | Integer | - | Number of worker node CPUs |
| `workerNodeCount` | Integer | - | Number of worker nodes |
| `workerNodeMemorySize` | Integer | - | Worker node memory capacity (byte) |
| `edgeNodeCpuCount` | Integer | - | Number of edge node CPUs |
| `edgeNodeCount` | Integer | - | Number of edge nodes |
| `edgeNodeMemorySize` | Integer | - | Edge node memory capacity (byte) |
| `cloudHadoopInstanceOperation` | Object | - | Cluster operation information - Displayed if `cloudHadoopInstanceStatusName` is `running` or `settingup` |
| `cloudHadoopInstanceOperation.code` | String | - | Cluster operation code - `SETUP` \| `NULL` - `SETUP`: Cloud Hadoop SETUP OP - `NULL`: Cloud Hadoop NULL OP |
| `cloudHadoopInstanceOperation.codeName` | String | - | Cluster operation code name |
| `cloudHadoopInstanceStatusName` | String | - | Cluster status name - `creating` \| `running` \| `settingup` \| `deleting` - `creating`: creating - `running`: running - `settingup`: setting up - `deleting`: deleting |
| `publicDnsName` | String | - | Public domain |
| `publicIp` | String | - | Public IP address |
| `isHa` | Boolean | - | High availability support - `true` (default) \| `false` - `true`: supported - `false`: not supported |
| `zone` | Object | - | Zone information |
| `zone.zoneNo` | String | - | Zone number |
| `zone.zoneName` | String | - | Zone name |
| `zone.zoneCode` | String | - | Zone code |
| `zone.zoneDescription` | String | - | Zone description |
| `zone.regionNo` | String | - | Region number |
| `region` | Object | - | Region information |
| `region.regionNo` | String | - | Region number |
| `region.regionCode` | String | - | Region code |
| `region.regionName` | String | - | Region name |
| `masterNodeServerName` | String | - | Master node server name |
| `createDate` | String | - | Cluster creation date and time - ISO 8601 format |
| `dataArchitecture` | String | - | Data architecture |
| `bucketName` | String | - | Object Storage bucket name |
| `directConnectionAccount` | String | - | Cluster's direct access account |
| `loginKeyName` | String | - | Authentication key name |
| `accessControlGroupList` | Array | - | [ACG list](/docs/en/analytics-cloudhadoop-changeworkernodecount#accessControlGroupList) |

#### `accessControlGroupList`

The following describes `accessControlGroupList`.

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `accessControlGroupConfigurationNo` | String | - | ACG ID |
| `accessControlGroupName` | String | - | ACG name |
| `accessControlGroupDescription` | String | - | Notes for the ACG |
| `isDefault` | Boolean | - | Whether it is a default ACG - `true` \| `false` - `true`: default ACG - `false`: not default ACG |
| `createDate` | String | - | ACG creation date and time - ISO 8601 format |

### Response status codes

For information about the HTTPS status codes common to all Cloud Hadoop APIs, see [Cloud Hadoop response status codes](/docs/en/analytics-cloudhadoop#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows:

```
{
    "changeWorkerNodeCountResponse": {
        "totalRows": 1,
        "cloudHadoopInstanceList": [
            {
                "cloudHadoopInstanceNo": "2777****",
                "cloudHadoopClusterName": "cluster",
                "cloudHadoopImageProductCode": "SPSWCHADPLINUX03",
                "cloudHadoopClusterType": {
                    "code": "CHADP",
                    "codeName": "Core Hadoop"
                },
                "masterNodeCpuCount": 4,
                "masterNodeCount": 2,
                "masterNodeMemorySize": 8589934592,
                "workerNodeCpuCount": 4,
                "workerNodeCount": 2,
                "workerNodeMemorySize": 34359738368,
                "edgeNodeCpuCount": 4,
                "edgeNodeCount": 1,
                "edgeNodeMemorySize": 8589934592,
                "cloudHadoopInstanceOperation": {
                    "code": "SETUP",
                    "codeName": "Cloud Hadoop SETUP OP"
                },
                "cloudHadoopInstanceStatusName": "settingup",
                "publicDnsName": "****.hadoop.ntruss.com",
                "publicIp": "***.***.***.***",
                "isHa": true,
                "zone": {
                    "zoneNo": "3",
                    "zoneName": "KR-2",
                    "zoneCode": "KR-2",
                    "zoneDescription": "Pyeongchon zone",
                    "regionNo": "1"
                },
                "region": {
                    "regionNo": "1",
                    "regionCode": "KR",
                    "regionName": "Korea"
                },
                "masterNodeServerName": "m-001-cluster-hd",
                "createDate": "2025-02-28T09:16:46+0900",
                "dataArchitecture": "OBJST",
                "bucketName": "dataforest",
                "directConnectionAccount": "sshuser",
                "loginKeyName": "test-123",
                "accessControlGroupList": [
                    {
                        "accessControlGroupConfigurationNo": "192****",
                        "accessControlGroupName": "cloud-hadoop-gjb5m",
                        "accessControlGroupDescription": "Group for Cloud Hadoop cluster cluster (automatically created)",
                        "isDefault": false,
                        "createDate": "2025-02-28T09:16:48+0900"
                    }
                ]
            }
        ],
        "requestId": "21e41806-****-****-****-e89ded4655ed",
        "returnCode": "0",
        "returnMessage": "success"
    }
}
```