我正在尝试通过 Lambda 函数调用将一些数据发布到 SNS,但它似乎不起作用。我的功能代码是 -
public class Handler implements RequestHandler<DynamodbEvent, Void> {
private static final String SNS_TOPIC_ARN = "arn:aws:sns:us-west-2:account_number:function_name";
@Override
public Void handleRequest(DynamodbEvent dynamodbEvent, Context context) {
LambdaLogger logger = context.getLogger();
AmazonSNSClient snsClient = new AmazonSNSClient(new DefaultAWSCredentialsProviderChain());
snsClient.setRegion(Region.getRegion(Regions.US_WEST_2));
for (DynamodbStreamRecord record : dynamodbEvent.getRecords()) {
Map<String, AttributeValue> newImage = record.getDynamodb().getNewImage();
if (newImage == null) {
continue;
}
String sensorId = newImage.get("sensorID").getS();
long timestamp = Long.parseLong(newImage.get("timestamp").getS());
double temperature = Double.parseDouble(newImage.get("payload").getM().get("temp").getN());
String data = sensorId + " " + timestamp + " " + temperature;
logger.log(data);
PublishRequest publishRequest = new PublishRequest(SNS_TOPIC_ARN, data);
PublishResult publishResult = snsClient.publish(publishRequest);
logger.log("Publish Successful " + publishResult.getMessageId());
}
snsClient.shutdown();
return null;
}
}
此调用导致超时(10 秒)并且 lambda 调用失败。如果我注释掉 SNS 发布部分,即,如果我只记录从 DynamoDB 接收到的数据,它就可以正常工作。一旦添加 SNS 发布代码,它就会超时。
CloudWatch 中记录的超时消息是 -
START RequestId: 8db74187-459b-42c5-8a06-b3a74873b236 Version: $LATEST
END RequestId: 8db74187-459b-42c5-8a06-b3a74873b236
REPORT RequestId: 8db74187-459b-42c5-8a06-b3a74873b236 Duration: 10001.66 ms Billed Duration: 10000 ms Memory Size: 128 MB Max Memory Used: 37 MB
Task timed out after 10.00 seconds
我拥有所有适当的权限,并且可以使用在我的 PC 上运行的以下代码发布到 SNS -
PublishRequest publishRequest = new PublishRequest(SNS_TOPIC_ARN, data);
PublishResult publishResult = snsClient.publish(publishRequest);
System.out.println("Publish Successful " + publishResult.getMessageId());
我也尝试过使用AmazonSNSAsyncClient
而不是AmazonSNSClient
,它给出了相同的结果。
我在这里想念什么?