【发布时间】：2023-02-14 19:40:31
【问题描述】：
我正在尝试将 lambda 连接到 DAX（DynamoDB 内存缓存）。我正在通过 CDK 进行设置。经过一番努力，我今天让它工作了，然后几个小时后它就停止工作了。
它所做的只是根据模式将记录写入 DynamoDB 或 DAX。它可以可靠地写入 DynamoDB，但我似乎在使用 DAX 时犯了一个基本错误，而且似乎没有什么韵律或理由说明它为什么能工作或不能工作。
首先，这是 lambda 的简化版本：
import { DynamoDB } from 'aws-sdk';
import AmazonDaxClient from 'amazon-dax-client';
function instantiateDrivers(daxClusterEndpoint: string) {
const options = {
endpoint: 'http://dynamodb.eu-west-1.amazonaws.com',
};
// See https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/DAX.concepts.cluster.html
if (daxClusterEndpoint && daxClusterEndpoint.length > 0) {
console.log(`Using DAX cluster: ${daxClusterEndpoint}`);
const dax = new AmazonDaxClient({
endpoints: [`daxs://${daxClusterEndpoint}`],
region: 'eu-west-1',
maxRetries: 1,
});
// @ts-ignore
options.service = dax;
}
const dynamoDbServiceClient = new DynamoDB(options);
console.log(`Instantiated DynamoDB`);
const dynamoDbDocumentClient = new DynamoDB.DocumentClient(options);
console.log(`Instantiated DocumentClient`);
return { dynamoDbServiceClient, dynamoDbDocumentClient };
}
async function writeRecord(daxClusterEndpoint: string, voucherTableName: string, record: any) {
// Create the drivers
let { dynamoDbDocumentClient } = instantiateDrivers(daxClusterEndpoint);
console.log(`Instantiated drivers OK`);
// Do the write
await dynamoDbDocumentClient.
put({ TableName: voucherTableName, Item: record}).
promise();
}
function validateArguments(event: any) {
const { VOUCHER_TABLE_NAME, DAX_CLUSTER_ENDPOINT } = event;
if (!VOUCHER_TABLE_NAME) {
throw new Error(`A VOUCHER_TABLE_NAME must be supplied`);
}
return {
voucherTableName: VOUCHER_TABLE_NAME,
daxClusterEndpoint: DAX_CLUSTER_ENDPOINT,
};
}
export const handler = async (event: any, context: any) => {
console.log("Received lambda call: " + JSON.stringify(event, null, 2));
// Try to get args
const { voucherTableName, daxClusterEndpoint } = validateArguments(event);
// This is a record we want to write
await writeRecord(
daxClusterEndpoint,
voucherTableName,
// Note the object is in v2 format, not v1 (with the 'S' 'M' and 'BOOL' type keys)
{
"code": "TEST-VOUCHER-1234",
"siteId": "3",
"endDate": "2022-08-31T13:39:56.000Z",
"name": "permanent",
"startDate": "2022-07-20T13:39:56.000Z",
"type": "XPercentOffProductPromotion",
"used": false,
}
);
return context.logStreamName;
};
接下来，这是 CDK：
import {CfnOutput, Stack, StackProps, Duration} from 'aws-cdk-lib';
import { Construct } from 'constructs';
import * as path from "path";
import {NodejsFunction} from "aws-cdk-lib/aws-lambda-nodejs";
import {Runtime} from "aws-cdk-lib/aws-lambda";
import {PolicyStatement, Role, ServicePrincipal, Effect} from "aws-cdk-lib/aws-iam"
import {Vpc, SecurityGroup, SubnetType} from "aws-cdk-lib/aws-ec2";
export class SupportScriptStack extends Stack {
constructor(scope: Construct, id: string, props?: StackProps) {
super(scope, id, props);
const importedVpc = Vpc.fromLookup(this, 'imported-vpc', { vpcName: `${process.env.STAGE}-eu-west-1`})
const voucherStatement = new PolicyStatement({
resources: [
'arn:aws:dynamodb:eu-west-1:*:table/voucher-promotion-*',
'arn:aws:dax:eu-west-1:*:cache/dax-cluster-preprod'
],
actions: [
"dynamodb:BatchGetItem",
"dynamodb:BatchWriteItem",
"dynamodb:PutItem",
"dynamodb:DescribeTable",
"dynamodb:DeleteItem",
"dynamodb:GetItem",
"dynamodb:Scan",
"dynamodb:Query",
"dynamodb:UpdateItem",
"dynamodb:DescribeTimeToLive",
"dynamodb:ListTables",
"dynamodb:DescribeLimits",
"dax:BatchGetItem",
"dax:BatchWriteItem",
"dax:PutItem",
"dax:DescribeTable",
"dax:DeleteItem",
"dax:GetItem",
"dax:Scan",
"dax:Query",
"dax:UpdateItem",
"dax:DescribeTimeToLive",
"dax:ListTables",
"dax:DescribeLimits"
]
});
const securityGroup = new SecurityGroup(
this,
"LambdaSecurityGroup",
{
vpc: importedVpc,
description: "Demo API Security Group",
allowAllOutbound: true,
}
);
const role = new Role(this, "DemoApiLambdaRole", {
assumedBy: new ServicePrincipal("lambda.amazonaws.com"),
});
role.addToPolicy(
new PolicyStatement({
effect: Effect.ALLOW,
actions: [
// VPC
"ec2:DescribeNetworkInterfaces",
"ec2:CreateNetworkInterface",
"ec2:DeleteNetworkInterface",
"ec2:DescribeInstances",
"ec2:AttachNetworkInterface",
// DAX
"dax:*",
// Need Dynamo as well
"dynamo:*",
],
resources: ["*"],
})
);
const voucherCodeFunction = new NodejsFunction(this, `VC-Create`, {
runtime: Runtime.NODEJS_16_X,
functionName: `voucher-code-importer`,
timeout: Duration.minutes(3), // Long timeout for now during debug phase
memorySize: 512,
bundling: {
minify: true,
},
handler: "handler",
entry: path.join(__dirname, `../src/create-voucher/handler.ts`),
vpc: importedVpc,
// See https://stackoverflow.com/a/72159511
securityGroups: [securityGroup],
role
});
voucherCodeFunction.addToRolePolicy(voucherStatement);
new CfnOutput(this, 'voucher-code-function-arn', {value: voucherCodeFunction.functionArn})
}
}
CDK 经历了一系列令人沮丧的混乱迭代——它以一种格式工作，我整理它或收紧一些权限，它停止工作，我恢复到旧的工作版本，现在它也停止工作了。
我确信这在没有 const voucherStatement = new PolicyStatement 部分的情况下工作了一段时间 - 我恢复了它以防它是新的一组失败的原因。我很确定这会重复 lambda 单独拥有的权限。
可能有用的一件事是将 lambda 的子网与 lambda 的子网同步。在这个项目中，一位同事在名为cdk.context.json 的文件中设置了可用子网的声明。
我相信我已经正确地同步了这一点，但此时我几乎抓住了救命稻草。稍微编辑了一下，但应该足够清楚了：
{
"vpc-provider:account=9015xxxxxxxx:filter.tag:Name=preprod-eu-west-1:region=eu-west-1:returnAsymmetricSubnets=true": {
"vpcId": "vpc-0d891xxxxxxxxxxxx",
"vpcCidrBlock": "172.35.0.0/16",
"availabilityZones": [],
"subnetGroups": [
{
"name": "Private",
"type": "Private",
"subnets": [
{
"subnetId": "subnet-0ad04xxxxxxxxxxxx",
"cidr": "172.35.a.0/22",
"availabilityZone": "eu-west-1b",
"routeTableId": "rtb-0fee4xxxxxxxxxxxx"
},
{
"subnetId": "subnet-08598xxxxxxxxxxxx",
"cidr": "172.35.z.0/22",
"availabilityZone": "eu-west-1c",
"routeTableId": "rtb-0f477xxxxxxxxxxxx"
}
]
},
{
"name": "Public",
"type": "Public",
"subnets": [
{
"subnetId": "subnet-0fba3xxxxxxxxxxxx",
"cidr": "172.35.y.0/22",
"availabilityZone": "eu-west-1b",
"routeTableId": "rtb-02dfbxxxxxxxxxxxx"
},
{
"subnetId": "subnet-0a3b8xxxxxxxxxxxx",
"cidr": "172.35.x.0/22",
"availabilityZone": "eu-west-1c",
"routeTableId": "rtb-02dfbxxxxxxxxxxxx"
}
]
}
]
}
}
如果我将记录写入 Dynamo（通过不在有效负载中提供 DAX_CLUSTER_ENDPOINT 键）那么就可以了。但是，如果我为此 (dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com) 提供一个值，那么它有时会工作几个小时，有时不会。
我注意到在错误中系统无法解析 daxs:// 地址，但后来给出了它解析到的 IP 地址（并且“无法从中提取”）：
2022-08-03T12:01:58.698+01:00 START RequestId: 08510000-0000-0000-0000-dc6255000000 Version: $LATEST
2022-08-03T12:01:58.700+01:00 2022-08-03T11:01:58.700Z 08510000-0000-0000-0000-dc6255000000 INFO Received lambda call: { "VOUCHER_TABLE_NAME": "voucher-promotion-preprod", "DAX_CLUSTER_ENDPOINT": "dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com" }
2022-08-03T12:01:58.701+01:00 2022-08-03T11:01:58.700Z 08510000-0000-0000-0000-dc6255000000 INFO Using DAX cluster: dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com
2022-08-03T12:01:58.738+01:00 2022-08-03T11:01:58.738Z 08510000-0000-0000-0000-dc6255000000 INFO Instantiated DynamoDB
2022-08-03T12:01:58.740+01:00 2022-08-03T11:01:58.740Z 08510000-0000-0000-0000-dc6255000000 INFO Instantiated DocumentClient
2022-08-03T12:01:58.740+01:00 2022-08-03T11:01:58.740Z 08510000-0000-0000-0000-dc6255000000 INFO Instantiated drivers OK
2022-08-03T12:02:28.754+01:00 2022-08-03T11:02:28.754Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.222.11,172.35.111.212): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524538749, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:28.762+01:00 2022-08-03T11:02:28.762Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.222.11,172.35.111.212): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524538761, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:32.734+01:00 2022-08-03T11:02:32.734Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.222.11,172.35.111.222,172.35.111.212): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524542732, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:32.740+01:00 2022-08-03T11:02:32.740Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.212,172.35.111.222,172.35.222.11): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at processTimers (node:internal/timers:499:9) { time: 1659524542739, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:36.735+01:00 2022-08-03T11:02:36.735Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.212,172.35.222.11,172.35.111.222): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at processTimers (node:internal/timers:499:9) { time: 1659524546732, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:36.741+01:00 2022-08-03T11:02:36.741Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.222.11,172.35.111.212): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524546740, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:40.736+01:00 2022-08-03T11:02:40.735Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.111.212,172.35.222.11): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at processTimers (node:internal/timers:499:9) { time: 1659524550732, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:40.740+01:00 2022-08-03T11:02:40.740Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.222.11,172.35.111.212): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524550740, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:56.740+01:00 2022-08-03T11:02:56.740Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.212,172.35.222.11,172.35.111.222): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7) { time: 1659524566738, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:56.743+01:00 2022-08-03T11:02:56.743Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.111.212,172.35.222.11): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at processTimers (node:internal/timers:499:9) { time: 1659524566743, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:58.756+01:00 2022-08-03T11:02:58.756Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.212,172.35.222.11,172.35.111.222): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524568755, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:58.756+01:00 2022-08-03T11:02:58.756Z 08510000-0000-0000-0000-dc6255000000 ERROR as [Error]: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645 { time: 1659524578756, code: 'NoRouteException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:58.764+01:00 2022-08-03T11:02:58.764Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.212,172.35.222.11,172.35.111.222): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524568763, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:02:58.764+01:00 2022-08-03T11:02:58.764Z 08510000-0000-0000-0000-dc6255000000 ERROR as [Error]: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645 { time: 1659524578764, code: 'NoRouteException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:00.740+01:00 2022-08-03T11:03:00.740Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.212,172.35.222.11,172.35.111.222): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7) { time: 1659524570738, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:02.743+01:00 2022-08-03T11:03:02.743Z 08510000-0000-0000-0000-dc6255000000 ERROR caught exception during cluster refresh: as [Error]: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7) { time: 1659524582743, code: 'NoRouteException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:02.743+01:00 2022-08-03T11:03:02.743Z 08510000-0000-0000-0000-dc6255000000 ERROR Error: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7)
2022-08-03T12:03:02.744+01:00 2022-08-03T11:03:02.744Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.222.11,172.35.111.222,172.35.111.212): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7) { time: 1659524572742, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:02.744+01:00 2022-08-03T11:03:02.744Z 08510000-0000-0000-0000-dc6255000000 ERROR caught exception during cluster refresh: as [Error]: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645 { time: 1659524582744, code: 'NoRouteException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:02.744+01:00 2022-08-03T11:03:02.744Z 08510000-0000-0000-0000-dc6255000000 ERROR Error: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645
2022-08-03T12:03:04.741+01:00 2022-08-03T11:03:04.741Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.222.11,172.35.111.212): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7) { time: 1659524574739, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:04.743+01:00 2022-08-03T11:03:04.743Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.222.11,172.35.111.212,172.35.111.222): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524574742, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:06.743+01:00 2022-08-03T11:03:06.743Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.222.11,172.35.111.212,172.35.111.222): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524576740, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:06.745+01:00 2022-08-03T11:03:06.743Z 08510000-0000-0000-0000-dc6255000000 ERROR caught exception during cluster refresh: as [Error]: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7) { time: 1659524586743, code: 'NoRouteException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:06.745+01:00 2022-08-03T11:03:06.745Z 08510000-0000-0000-0000-dc6255000000 ERROR Error: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7)
2022-08-03T12:03:06.746+01:00 2022-08-03T11:03:06.746Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.222.11,172.35.111.212,172.35.111.222): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 { time: 1659524576742, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:06.746+01:00 2022-08-03T11:03:06.746Z 08510000-0000-0000-0000-dc6255000000 ERROR caught exception during cluster refresh: as [Error]: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645 { time: 1659524586746, code: 'NoRouteException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:06.746+01:00 2022-08-03T11:03:06.746Z 08510000-0000-0000-0000-dc6255000000 ERROR Error: NoRouteException: not able to resolve address: [{"host":"dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com","port":9111,"scheme":"daxs"}] at yu._resolveAddr (/var/task/index.js:1:7887) at /var/task/index.js:1:8298 at /var/task/index.js:1:8645
2022-08-03T12:03:08.746+01:00 2022-08-03T11:03:08.746Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.222.11,172.35.111.212): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7) { time: 1659524578744, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:08.747+01:00 2022-08-03T11:03:08.747Z 08510000-0000-0000-0000-dc6255000000 ERROR Failed to pull from dax-cluster-preprod.xxxxxx.dax-clusters.eu-west-1.amazonaws.com (172.35.111.222,172.35.111.212,172.35.222.11): so [Error]: ConnectionException: Connection timeout after 10000ms at Tu.alloc (/var/task/index.js:10:7418) at /var/task/index.js:66:89369 at runNextTicks (node:internal/process/task_queues:61:5) at listOnTimeout (node:internal/timers:528:9) at processTimers (node:internal/timers:502:7) { time: 1659524578745, code: 'ConnectionException', retryable: true, requestId: null, statusCode: -1, _tubeInvalid: false, waitForRecoveryBeforeRetrying: false }
2022-08-03T12:03:08.753+01:00 2022-08-03T11:03:08.752Z 08510000-0000-0000-0000-dc6255000000 ERROR Invoke Error {"errorType":"Error","errorMessage":"NoRouteException: No endpoints available","code":"NoRouteException","time":1659524588752,"retryable":true,"requestId":null,"statusCode":-1,"_tubeInvalid":false,"waitForRecoveryBeforeRetrying":false,"stack":["Error: NoRouteException: No endpoints available"," at vu.leaderClient (/var/task/index.js:10:11634)"," at Object.getClient (/var/task/index.js:66:116939)"," at /var/task/index.js:66:120803"," at new Promise (<anonymous>)"," at G0.makeRequestWithRetries (/var/task/index.js:66:120779)"," at /var/task/index.js:66:121294"]}
2022-08-03T12:03:08.757+01:00 END RequestId: 08510000-0000-0000-0000-dc6255000000
2022-08-03T12:03:08.757+01:00
REPORT RequestId: 08510000-0000-0000-0000-dc6255000000 Duration: 70055.20 ms Billed Duration: 70056 ms Memory Size: 512 MB Max Memory Used: 89 MB Init Duration: 463.81 ms
REPORT RequestId: 08510000-0000-0000-0000-dc6255000000 Duration: 70055.20 ms Billed Duration: 70056 ms Memory Size: 512 MB Max Memory Used: 89 MB Init Duration: 463.81 ms
我已经在这方面四处走动，网上几乎没有关于 DAX 的相关故障排除信息。我做这项工作只是因为 AWS 控制台中没有支持 DAX 的记录编辑器，并且担心我正在使用的系统已经有效地致力于预发布产品。
我可以尝试解决这个问题吗？
【问题讨论】：
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（我从日志中删除了一些相当相同的行，因为它超出了问题的允许长度）。
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如果相同的 lambda 有时有效而有时无效，则这是一个很大的暗示，表明子网路由已关闭。你有多少个子网？它们的配置相同吗？您（至少出于测试目的）是否考虑过仅将 lambda 部署到一个子网中并检查这是否会导致它持续工作或失败（两个结果都会告诉您一些事情）？
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@luk2302：好主意，谢谢。我想我会尝试的一件事是削减上下文文件，以便它只包含私有子网。我偷偷怀疑 DAX 只附加到私人的，我想知道这个文件中有两个公共的，两个私人的是否是不可靠的原因。
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恼人的是，我个人没有运行
aws dax describe-clusters的权限，但我想知道我的部署管道是否有！我会在这里更新。 -
好的，从上下文文件中删除公共子网也没有用。我会看看我是否可以直接确认有关集群的一些信息（我有一些来自同事的屏幕截图，我确信他们是正确的，但也许走过场会激发一个新想法）。
标签： typescript amazon-web-services amazon-dynamodb aws-cdk amazon-dynamodb-dax