Request Syntax Request Parameters Response Syntax Response Elements Errors Examples See Also

ListShards

Lists the shards in a stream and provides information about each shard. This operation has a limit of 1000 transactions per second per data stream.

Note

When invoking this API, you must use either the StreamARN or the StreamName parameter, or both. It is recommended that you use the StreamARN input parameter when you invoke this API.

This action does not list expired shards. For information about expired shards, see Data Routing, Data Persistence, and Shard State after a Reshard.

Important

This API is a new operation that is used by the Amazon Kinesis Client Library (KCL). If you have a fine-grained IAM policy that only allows specific operations, you must update your policy to allow calls to this API. For more information, see Controlling Access to Amazon Kinesis Data Streams Resources Using IAM.

Request Syntax


{
   "ExclusiveStartShardId": "string",
   "MaxResults": number,
   "NextToken": "string",
   "ShardFilter": { 
      "ShardId": "string",
      "Timestamp": number,
      "Type": "string"
   },
   "StreamARN": "string",
   "StreamCreationTimestamp": number,
   "StreamName": "string"
}

Request Parameters

The request accepts the following data in JSON format.

ExclusiveStartShardId

Specify this parameter to indicate that you want to list the shards starting with the shard whose ID immediately follows ExclusiveStartShardId.

If you don't specify this parameter, the default behavior is for ListShards to list the shards starting with the first one in the stream.

You cannot specify this parameter if you specify NextToken.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: [a-zA-Z0-9_.-]+

Required: No

MaxResults

The maximum number of shards to return in a single call to ListShards. The maximum number of shards to return in a single call. The default value is 1000. If you specify a value greater than 1000, at most 1000 results are returned.

When the number of shards to be listed is greater than the value of MaxResults, the response contains a NextToken value that you can use in a subsequent call to ListShards to list the next set of shards.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 10000.

Required: No

NextToken

When the number of shards in the data stream is greater than the default value for the MaxResults parameter, or if you explicitly specify a value for MaxResults that is less than the number of shards in the data stream, the response includes a pagination token named NextToken. You can specify this NextToken value in a subsequent call to ListShards to list the next set of shards.

Don't specify StreamName or StreamCreationTimestamp if you specify NextToken because the latter unambiguously identifies the stream.

You can optionally specify a value for the MaxResults parameter when you specify NextToken. If you specify a MaxResults value that is less than the number of shards that the operation returns if you don't specify MaxResults, the response will contain a new NextToken value. You can use the new NextToken value in a subsequent call to the ListShards operation.

Important

Tokens expire after 300 seconds. When you obtain a value for NextToken in the response to a call to ListShards, you have 300 seconds to use that value. If you specify an expired token in a call to ListShards, you get ExpiredNextTokenException.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1048576.

Required: No

ShardFilter

Enables you to filter out the response of the ListShards API. You can only specify one filter at a time.

If you use the ShardFilter parameter when invoking the ListShards API, the Type is the required property and must be specified. If you specify the AT_TRIM_HORIZON, FROM_TRIM_HORIZON, or AT_LATEST types, you do not need to specify either the ShardId or the Timestamp optional properties.

If you specify the AFTER_SHARD_ID type, you must also provide the value for the optional ShardId property. The ShardId property is identical in fuctionality to the ExclusiveStartShardId parameter of the ListShards API. When ShardId property is specified, the response includes the shards starting with the shard whose ID immediately follows the ShardId that you provided.

If you specify the AT_TIMESTAMP or FROM_TIMESTAMP_ID type, you must also provide the value for the optional Timestamp property. If you specify the AT_TIMESTAMP type, then all shards that were open at the provided timestamp are returned. If you specify the FROM_TIMESTAMP type, then all shards starting from the provided timestamp to TIP are returned.

Type: ShardFilter object

Required: No

StreamARN

The ARN of the stream.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 2048.

Pattern: arn:aws.*:kinesis:.*:\d{12}:stream/\S+

Required: No

StreamCreationTimestamp

Specify this input parameter to distinguish data streams that have the same name. For example, if you create a data stream and then delete it, and you later create another data stream with the same name, you can use this input parameter to specify which of the two streams you want to list the shards for.

You cannot specify this parameter if you specify the NextToken parameter.

Type: Timestamp

Required: No

StreamName

The name of the data stream whose shards you want to list.

You cannot specify this parameter if you specify the NextToken parameter.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: [a-zA-Z0-9_.-]+

Required: No

Response Syntax


{
   "NextToken": "string",
   "Shards": [ 
      { 
         "AdjacentParentShardId": "string",
         "HashKeyRange": { 
            "EndingHashKey": "string",
            "StartingHashKey": "string"
         },
         "ParentShardId": "string",
         "SequenceNumberRange": { 
            "EndingSequenceNumber": "string",
            "StartingSequenceNumber": "string"
         },
         "ShardId": "string"
      }
   ]
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

NextToken

Important

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1048576.

Shards

An array of JSON objects. Each object represents one shard and specifies the IDs of the shard, the shard's parent, and the shard that's adjacent to the shard's parent. Each object also contains the starting and ending hash keys and the starting and ending sequence numbers for the shard.

Type: Array of Shard objects

Errors

For information about the errors that are common to all actions, see Common Errors.

AccessDeniedException

Specifies that you do not have the permissions required to perform this operation.

HTTP Status Code: 400

ExpiredNextTokenException

The pagination token passed to the operation is expired.

HTTP Status Code: 400

InvalidArgumentException

A specified parameter exceeds its restrictions, is not supported, or can't be used. For more information, see the returned message.

HTTP Status Code: 400

LimitExceededException

The requested resource exceeds the maximum number allowed, or the number of concurrent stream requests exceeds the maximum number allowed.

HTTP Status Code: 400

ResourceInUseException

The resource is not available for this operation. For successful operation, the resource must be in the ACTIVE state.

HTTP Status Code: 400

ResourceNotFoundException

The requested resource could not be found. The stream might not be specified correctly.

HTTP Status Code: 400

Examples

To list the shards of a stream

The following JSON example lists three of the shards of the stream that is specified using StreamName. If the stream has more than three shards, the response includes a pagination token named NextToken. You can use NextToken in your input to a subsequent call to ListShards to get a listing of the next set of shards. When there are no more shards to be listed, the response doesn't contain NextToken.

Sample Request


POST / HTTP/1.1
Host: kinesis.<region>.<domain>
Content-Length: <PayloadSizeBytes>
User-Agent: <UserAgentString>
Content-Type: application/x-amz-json-1.1
Authorization: <AuthParams>
Connection: Keep-Alive 
X-Amz-Date: <Date>
X-Amz-Target: Kinesis_20131202.ListShards
{
    "StreamName": "exampleStreamName", 
    "MaxResults": 3
}

Sample Response


HTTP/1.1 200 OK
x-amzn-RequestId: <RequestId>
Content-Type: application/x-amz-json-1.1
Content-Length: <PayloadSizeBytes>
Date: <Date>
{
    "NextToken": "AAAAAAAAAAGK9EEG0sJqVhCUS2JsgigQ5dcpB4q9PYswrH2oK44Skbjtm+WR0xA7/hrAFFsohevH1/OyPnbzKBS1byPyCZuVcokYtQe/b1m4c0SCI7jctPT0oUTLRdwSRirKm9dp9YC/EL+kZHOvYAUnztVGsOAPEFC3ECf/bVC927bDZBbRRzy/44OHfWmrCLcbcWqehRh5D14WnL3yLsumhiHDkyuxSlkBepauvMnNLtTOlRtmQ5Q5reoujfq2gzeCSOtLcfXgBMztJqohPdgMzjTQSbwB9Am8rMpHLsDbSdMNXmITvw==", 
    "Shards": [
        {
            "ShardId": "shardId-000000000001", 
            "HashKeyRange": {
                "EndingHashKey": "68056473384187692692674921486353642280", 
                "StartingHashKey": "34028236692093846346337460743176821145"
            }, 
            "SequenceNumberRange": {
                "StartingSequenceNumber": "49579844037727333356165064238440708846556371693205002258"
            }
        }, 
        {
            "ShardId": "shardId-000000000002", 
            "HashKeyRange": {
                "EndingHashKey": "102084710076281539039012382229530463436", 
                "StartingHashKey": "68056473384187692692674921486353642281"
            }, 
            "SequenceNumberRange": {
                "StartingSequenceNumber": "49579844037749634101363594861582244564829020124710982690"
            }
        }, 
        {
            "ShardId": "shardId-000000000003", 
            "HashKeyRange": {
                "EndingHashKey": "136112946768375385385349842972707284581", 
                "StartingHashKey": "102084710076281539039012382229530463437"
            }, 
            "SequenceNumberRange": {
                "StartingSequenceNumber": "49579844037771934846562125484723780283101668556216963122"
            }
        }
    ]
}