我要获取以下代码
def getSample(accessKey: String, secretKey: String, streamName: String, size: Int, endpoint: String, region: String): Unit = {
var client=getKinesisClient(accessKey, secretKey, endpoint, region)
val decoder = Charset.forName("UTF-8").newDecoder()
var shards = getShards(accessKey, secretKey, streamName, endpoint, region)
val numberOfShards = shards.iterator()
var isStop = false
var sampleRecords = new StringBuilder
while (numberOfShards.hasNext() && !isStop) {
val shard = numberOfShards.next()
var shardIterator: String = null
val getShardIteratorRequest = new GetShardIteratorRequest()
getShardIteratorRequest.setStreamName(streamName)
getShardIteratorRequest.setShardId(shard.getShardId())
getShardIteratorRequest.setShardIteratorType("TRIM_HORIZON")
val getShardIteratorResult = client.getShardIterator(getShardIteratorRequest)
shardIterator = getShardIteratorResult.getShardIterator
var getRecordsRequest = new GetRecordsRequest
getRecordsRequest.setShardIterator(shardIterator)
var records: List[Record] = client.getRecords(getRecordsRequest).getRecords()
println(records.size())
var itr = records.iterator()
var SampleData = new ArrayList[String]()
while (itr.hasNext()) {
val record = itr.next()
val data = decoder.decode(record.getData).toString
println(data)
}
}
}
这会打印出记录数为 0。我用 aws cli 也是如此
aws kinesis put-records --records "Data=hello world - hemant,PartitionKey=20150421" --stream-name simpleStream
返回0条失败记录 然后我按照命令运行
aws kinesis get-shard-iterator --stream-name simpleStream --shard-id 0 --shard-iterator-type TRIM_HORIZON
和
aws kinesis get-records --shard-iterator xxxxxxxxx
它也返回空数组。
有人可以帮帮我吗? 谢谢
最佳答案
GetRecords
并不总是返回记录,即使分片中有记录也是如此。
这在常见问题解答中有描述。
https://aws.amazon.com/kinesis/streams/faqs/
问:为什么 GetRecords 调用返回空结果,而我的 Amazon Kinesis 流中有数据?
您正在从 TRIM_HORIZON
位置请求记录,这是分片中最旧的位置。
如果您连续多次调用 get-records
(10 次或 20 次或更多次)并继续迭代器点,您将遇到记录。
以下论坛也很有用:: https://forums.aws.amazon.com/thread.jspa?messageID=509980
关于amazon-web-services - AWS 运动不返回记录,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38567528/