mwestwood

org.springframework.web.HttpMessageNotReadableException,0
org.springframework.web.HttpRequestMethodNotSupportedException,0
org.springframework.web.HttpMediaTypeNotSupportedException,0
org.springframework.web.HttpMediaTypeNotAcceptableException,0
org.springframework.web.client.HttpClientErrorException,0
org.springframework.web.client.HttpServerErrorException,0
org.springframework.web.client.ResourceAccessException,0

mwestwood

org.springframework.web.HttpMessageNotReadableException,42,Normal volume,13.5
org.springframework.web.HttpRequestMethodNotSupportedException,57,Normal volume,17.8
org.springframework.web.HttpMediaTypeNotSupportedException,23,Anomalous volume,8.7
org.springframework.web.HttpMediaTypeNotAcceptableException,68,Normal volume,5.6
org.springframework.web.client.HttpClientErrorException,95,Normal volume,4.3
org.springframework.web.client.HttpServerErrorException,31,Normal volume,14.2
org.springframework.web.client.ResourceAccessException,12,Normal volume,11.9
org.springframework.transaction.TransactionSystemException,76,Anomalous volume,6.8
org.springframework.transaction.IllegalTransactionStateException,88,Anomalous volume,19.5

mwestwood

Designing a self-healing system that takes actions in response to alerts and logs without requiring configuration or code changes is a great way to improve the reliability and availability of your applications. Here are some additional actions you can consider:

1. Auto-Scaling: Implement auto-scaling based on resource utilization metrics. When CPU, memory, or other resource usage exceeds predefined thresholds, automatically add or remove instances to adjust capacity.

2. Process or Service Restart: Automatically restart specific processes or services within an application when they become unresponsive or encounter errors. This can help clear transient issues.

3. Log Rotation and Management: Implement automated log rotation and management to prevent log files from consuming all available disk space. Ensure that logs are regularly archived and compressed.

4. Database Connection Pool Reset: Periodically reset database connection pools to release stale or hanging connections. This can help prev

mwestwood

import logging
import os
from flask import Flask, jsonify

app = Flask(__name__)

# Create a lock file to indicate whether a request is in progress
lock_file_path = "request_lock.lock"

@app.route('/')

mwestwood

import logging
import os
import threading
from flask import Flask, jsonify

app = Flask(__name__)

# Create a lock to serialize access to the log file
log_file_lock = threading.Lock()

mwestwood

import logging
import os
import threading
from flask import Flask, jsonify

app = Flask(__name__)

# Create a lock to serialize access to the log file
log_file_lock = threading.Lock()

mwestwood

import logging

# Configure logging
logging.basicConfig(level=logging.INFO, format='%(message)s')
logger = logging.getLogger()

# Add a file handler to log to a text file
file_handler = logging.FileHandler('output.log')
file_handler.setLevel(logging.INFO)
file_handler.setFormatter(logging.Formatter('%(asctime)s - %(message)s'))

mwestwood

import requests
import time

# Function to start the job
def start_job(start_endpoint):
    response = requests.post(start_endpoint)
    if response.status_code == 200:
        print("Job started successfully.")
    else:
        print("Failed to start the job.")

mwestwood

exception: "Stale database connection"
tags: stale_db, stale_db_connection, connection_pooling
mitigation:
- Runbook Owner: [Your Name]
- Last Updated: [Date]

Steps to Mitigate:

1. **Identify Affected Instances:**

mwestwood

"503 Service Unavailable: The server is unable to handle the request due to a temporary condition. Please try again later." -> Load balancer issue
"503 Service Unavailable: The requested service is currently unavailable due to server overload." -> High traffic volume
"503 Service Unavailable: The server is currently undergoing maintenance. Please try again later." -> Scheduled maintenance
"503 Service Unavailable: The server is busy or down for maintenance. Please try again later." -> Server maintenance
"503 Service Unavailable: The service you are trying to access is currently unavailable. We apologize for the inconvenience." -> Service outage
"503 Service Unavailable: The server is under heavy load and unable to respond to your request at the moment." -> High server load
"503 Service Unavailable: The server is currently unable to handle the request due to a high load. Please try again later." -> High server load
"503 Service Unavailable: Our system is undergoing maintenance. Please check back shortly."