AWS XRay：无法写入 /tmp/。aws-xray/initialized。未能发出 SDK 初始化信号

Question

我正在尝试编写一个 Lambda 函数来将数据存储在 dyanamodb 中并尝试与 AWS Xray 集成。下面是 Lambda 函数的代码。我收到错误

Unable to write to /tmp/.aws-xray/initialized. Failed to signal SDK initialization. Subsegment put_item discarded due to Lambda worker still initializing

我安装了 Aws xray SDK 包。此外，开始段和结束段也包含在代码中。并设置环境变量LAMBDA_TASK_ROOT。请给出这个错误的解决方案。

import json
import os
import configparser
import boto3
from aws_xray_sdk.core import xray_recorder
from aws_xray_sdk.core import patch

patch(['boto3'])
dynamodb = boto3.resource('dynamodb')
table = dynamodb.Table(os.environ['dynamodb_table'])

def lambda_handler(event, context):
    for i in event:
        item = {
            'key': i['key'],
            'search': i['search'],
        }
        put_item_into_dynamodb(item)

    response = {
         "statusCode": 200,
         "body": json.dumps(item)
    }
    return response

def put_item_into_dynamodb(item):
    try:
        xray_recorder.begin_subsegment('put_item')
        response = table.put_item(Item=item)
        status_code = response['ResponseMetadata']['HTTPStatusCode']
        xray_recorder.current_subsegment().put_annotation('put_response', status_code)
    finally:
        xray_recorder.end_subsegment()

Update-2（第二个问题）：在这段代码中 AttributeError: 'NoneType' object has no attribute 'put_annotation' 这个错误来了..我没有知道为什么会这样..

def lambda_handler(event, context):

    val = (str(event['userId']),str(event['teamId']), str(event['searchScope']))
    key_table = "|".join(val)
    key = {
        'key': key_table
    }
    response = get_item_into_dynamodb(key)

    try:
        data = response['Item']
        for i in data['search']:
            keyword_list.append(i['searchText'])
            dict_of_keyword[i['searchText']] = i['dateTime']

        recent_sort = sorted(dict_of_keyword.items(), key=lambda x: x[1], reverse=True)
def get_item_into_dynamodb(key):
    try:
        xray_recorder.begin_segment('get_item')
        response = table.get_item(Key = key)
        status_code = response['ResponseMetadata']['HTTPStatusCode']
        xray_recorder.current_subsegment().put_annotation('get_response', status_code) #error is on this line
    finally:
        xray_recorder.end_subsegment()

    return response

Answer 1

您不能在 Lambda 函数内创建分段。 Lambda 将在外部包装器中创建您无法在函数内访问的段。您可以尝试将 xray_recorder.begin_segment('get_item') 更改为 xray_recorder.begin_subsegment('get_item') 吗？

此外，不会捕获在 lambda 处理程序外部生成的跟踪数据，因为在此期间 lambda 函数仍在初始化并且没有可用的跟踪上下文。

AWS XRay：无法写入 /tmp/。aws-xray/initialized。未能发出 SDK 初始化信号

AWS XRay: Unable to write to /tmp/.aws-xray/initialized. Failed to signal SDK initialization

python

amazon-web-services

aws-lambda

aws-xray