End of support notice: On October 7th, 2026, AWS will discontinue support for AWS IoT Greengrass Version 1. After October 7th, 2026, you will no longer be able to access the AWS IoT Greengrass V1 resources. For more information, please visit [Migrate from AWS IoT Greengrass Version 1](https://docs.aws.amazon.com/greengrass/v2/developerguide/migrate-from-v1.html).

# GetLoggerDefinitionVersion
<a name="getloggerdefinitionversion-get"></a>

Retrieves information about a logger definition version.

URI: `GET /greengrass/definition/loggers/LoggerDefinitionId/versions/LoggerDefinitionVersionId`

Produces: application/json

## CLI:
<a name="getloggerdefinitionversion-get-cli"></a>

```
aws greengrass get-logger-definition-version \
  --logger-definition-version-id <value> \
  --logger-definition-id <value> \
  [--next-token <value>]  \
  [--cli-input-json <value>] \
  [--generate-cli-skeleton]
```

cli-input-json format:

```
{
"LoggerDefinitionVersionId": "string",
"LoggerDefinitionId": "string",
"NextToken": "string"
}
```

## Parameters:
<a name="getloggerdefinitionversion-get-params"></a>

[**LoggerDefinitionVersionId**](parameters-loggerdefinitionversionidparam.md)  
The ID of the logger definition version. This value maps to the `Version` property of the corresponding `VersionInformation` object, which is returned by `ListLoggerDefinitionVersions` requests. If the version is the last one that was associated with a logger definition, the value also maps to the `LatestVersion` property of the corresponding `DefinitionInformation` object.   
where used: path; required: true  
type: string

[**LoggerDefinitionId**](parameters-loggerdefinitionidparam.md)  
The ID of the logger definition.  
where used: path; required: true  
type: string

[**NextToken**](parameters-nexttokenparam.md)  
The token for the next set of results, or `null` if there are no more results.  
where used: query; required: false  
type: string

## Responses:
<a name="getloggerdefinitionversion-get-resp"></a>

**200** (GetLoggerDefinitionVersionResponse)  
Success.  
 [ GetLoggerDefinitionVersionResponse](definitions-getloggerdefinitionversionresponse.md)   

```
{
"Arn": "string",
"Id": "string",
"Version": "string",
"CreationTimestamp": "string",
"Definition": {
  "Loggers": [
    {
      "Id": "string",
      "Type": "FileSystem|AWSCloudWatch",
      "Component": "GreengrassSystem|Lambda",
      "Level": "DEBUG|INFO|WARN|ERROR|FATAL",
      "Space": 0
    }
  ]
}
}
```  
GetLoggerDefinitionVersionResponse  
Information about a logger definition version.  
type: object  
Arn  
The ARN of the logger definition version.  
type: string  
Id  
The ID of the logger definition version.  
type: string  
Version  
The version of the logger definition version.  
type: string  
CreationTimestamp  
The time, in milliseconds since the epoch, when the logger definition version was created.  
type: string  
Definition  
Information about a logger definition version.  
type: object  
Loggers  
A list of loggers.  
type: array  
items: [Logger](definitions-logger.md)  
Logger  
Information about a logger  
type: object  
required: ["Id", "Type", "Component", "Level"]  
Id  
A descriptive or arbitrary ID for the logger. This value must be unique within the logger definition version. Maximum length is 128 characters with the pattern `[a‑zA‑Z0‑9:_‑]+`.  
type: string  
Type  
type: string  
enum: ["FileSystem", "AWSCloudWatch"]  
Component  
type: string  
enum: ["GreengrassSystem", "Lambda"]  
Level  
type: string  
enum: ["DEBUG", "INFO", "WARN", "ERROR", "FATAL"]  
Space  
The amount of file space, in KB, to use if the local file system is used for logging purposes.  
type: integer

**400**  
Invalid request.  
 [ GeneralError](definitions-generalerror.md)   

```
{
"Message": "string",
"ErrorDetails": [
  {
    "DetailedErrorCode": "string",
    "DetailedErrorMessage": "string"
  }
]
}
```  
GeneralError  
General error information.  
type: object  
required: ["Message"]  
Message  
A message that contains information about the error.  
type: string  
ErrorDetails  
A list of error details.  
type: array  
items: [ErrorDetail](definitions-errordetail.md)  
ErrorDetail  
Details about the error.  
type: object  
DetailedErrorCode  
A detailed error code.  
type: string  
DetailedErrorMessage  
A detailed error message.  
type: string