System Online 124 Errors Logged

DevOps Error
Database

The automated solution engine for your broken pipelines.

Cloud

28
Alibaba Cloud
Critical

InvalidAccessKeyId

How to Fix Alibaba Cloud InvalidAccessKeyId.NotFound

Alibaba Cloud
Warning

Throttling.User

How to Fix Alibaba Cloud Throttling.User API Limit

AWS
Error

AccessDeniedException

How to Fix AWS AccessDeniedException Error

AWS
Error

InvalidClientTokenId

How to Fix AWS InvalidClientTokenId

AWS
Warning

ThrottlingException

How to Fix AWS Lambda ThrottlingException (Rate Exceeded)

AWS
Critical

RateExceeded

How to Fix AWS RateExceeded

AWS
Warning

ThrottlingException

How to Fix AWS General SDK ThrottlingException

Azure
Warning

SqlTimeoutException

How to Fix Azure SQL Database Connection Timeout

Azure
Warning

ServerBusy

How to Fix Azure SQL ServerBusy (DTU Limit Reached)

GCP
Warning

Cloud-Run-429

How to Fix GCP Cloud-Run-429

GCP
Error

Container Startup Timeout

How to Fix GCP Container Startup Timeout

GCP
Critical

CloudSQLInstanceDiskFull

GCP Cloud SQL Instance Disk Full: Troubleshooting Guide

GCP
Error

PERMISSION_DENIED

How to Fix GCP IAM PERMISSION_DENIED Error

GCP
Critical

RESOURCE_EXHAUSTED

How to Fix GCP RESOURCE_EXHAUSTED: Quota Limits

GCP
Error

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

GCP Load Balancer SSL Handshake Failed: Troubleshooting Guide

AWS
Critical

ALB-502

How to Fix AWS ALB-502

AWS
Warning

ELB-5xx

How to Fix AWS Application Load Balancer 504 Gateway Timeout Error

AWS
Critical

EC2InstanceLimitExceeded

How to Fix AWS EC2 Instance Limit Exceeded Error (2025)

AWS
Critical

EC2InstanceLimitExceeded

How to Fix AWS EC2 Instance Limit Exceeded Error (2025 Service Quotas)

Alibaba Cloud
Critical

Node NotReady

How to Fix Alibaba Cloud Node NotReady

Alibaba Cloud
Critical

OOMKilled

Root Cause Analysis: Why Alibaba Cloud ACK Pods Get OOMKilled

Alibaba Cloud
Critical

SLB 502 Bad Gateway

Root Cause Analysis: Why Alibaba Cloud SLB 502 Bad Gateway Happens (Architecture Deep Dive)

Alibaba Cloud
Critical

SLBHealthCheckFailed

Root Cause Analysis: Why Alibaba Cloud SLB Health Check Fails

Alibaba Cloud
Error

SSL-Handshake-Failed

How to Fix Alibaba Cloud SSL-Handshake-Failed

Azure
Critical

CrashLoopBackOff

Solved: Azure Kubernetes Service (AKS) Pod CrashLoopBackOff in Kubernetes 1.31

Azure
Critical

502 Bad Gateway

How to Fix Azure 502 Bad Gateway

Azure
Critical

VMExtensionProvisioningFailed

Solved: Azure VM Extension Provisioning Failed (Custom Script & Dependency Agent)

Azure
Critical

VMExtensionProvisioningError

Solved: Azure VM Extension Provisioning Failed (Windows/Linux 2025)

OS

26
Linux
Critical

502 Bad Gateway

How to Fix 502 Bad Gateway in Nginx/Apache on Ubuntu 24.04

Linux
Critical

502 Bad Gateway

How to Fix 502 Bad Gateway in NGINX on Ubuntu 24.04 LTS

Linux
Error

ImagePullBackOff

Kubernetes Troubleshooting Guide: Diagnosing ImagePullBackOff on Linux Nodes

Linux
Critical

EIO

How to Fix Linux EIO

Linux
Error

EACCES

How to Fix Linux Error EACCES (13): Permission Denied

Linux
Critical

EADDRINUSE

How to Fix Linux EADDRINUSE: Address Already in Use

Linux
Error

ECONNREFUSED

How to Fix Linux Error ECONNREFUSED (111): Connection Refused

Linux
Critical

EHOSTUNREACH

How to Fix Linux EHOSTUNREACH: No Route to Host

Linux
Critical

ENOMEM

How to Fix Linux ENOMEM: Out of Memory Error

Linux
Critical

ENOSPC

How to Fix Linux Error ENOSPC: No Space Left on Device

Linux
Warning

ETIMEDOUT

How to Fix Linux ETIMEDOUT

Windows
Critical

0xc000021a

Root Cause Analysis: Why Windows 11/Server 2022 BSOD STOP 0xc000021a Happens

Windows
Critical

0x8007000E

Root Cause Analysis: Why Windows Update Error 0x8007000E (Out of Memory) Happens

Windows
Error

0x8007000e

Root Cause Analysis: Why Windows Update Error 0x8007000e Happens

Linux
Critical

502 Bad Gateway

How to Fix 502 Bad Gateway in Nginx on Ubuntu 24.04 LTS

Windows
Critical

SSL Handshake Failed

Solved: SSL/TLS Handshake Failed Error in IIS on Windows Server 2025

Windows
Critical

SSL Handshake Failed

Solved: SSL/TLS Handshake Failed in Windows Server 2025 IIS

Windows
Critical

SSL Handshake Failed

Solved: SSL/TLS Handshake Failed in Windows Server 2026

Linux
Critical

Kernel Panic

Troubleshooting Guide: Diagnosing Linux Kernel Panic on Production Servers

Linux
Critical

Kernel Panic

Troubleshooting Guide: Diagnosing Linux Kernel Panic on Production Servers

Windows
Error

0x80070005

How to Fix Windows 0x80070005

Windows
Error

0x80004005

How to Fix Windows Error 0x80004005 (Unspecified Error)

Windows
Error

0x80070020

How to Fix Windows Error 0x80070020 (File In Use)

Windows
Critical

0x80070070

How to Fix Windows Error 0x80070070 (Disk Space)

Windows
Critical

0xc000021a

How to Fix Windows Stop Code 0xc000021a (BSOD)

Windows
Error

0x8007000D

How to Fix Windows Update Error 0x8007000D

Database

23
MySQL
Critical

ERROR 1040

How to Fix MySQL Error 1040: Too Many Connections

MySQL
Error

ERROR 1062

How to Fix MySQL ERROR 1062: Duplicate Entry

MySQL
Warning

ERROR 1205 (HY000)

How to Fix MySQL Error 1205: Lock Wait Timeout Exceeded

MySQL
Error

ERROR 2003

How to Fix MySQL Error 2003 (HY000): Can't Connect to Server

MySQL
Critical

ERROR: 2013

Solved: MySQL 'Lost Connection to Server During Query' Error in Production

MySQL
Critical

ERROR: 3167

Solved: MySQL ERROR 3167 (InnoDB Buffer Pool Corruption) in MySQL 8.4

MySQL
Critical

ERROR: 3169

Solved: MySQL 8.4 'InnoDB Log File Corrupted' Error on Startup

PostgreSQL
Error

23503

How to Fix PostgreSQL Error 23503: Foreign Key Violation

PostgreSQL
Error

ERROR: 42703

How to Fix PostgreSQL Error 42703: Undefined Column

PostgreSQL
Critical

53300

How to Fix PostgreSQL FATAL: sorry, too many clients already

PostgreSQL
Error

ERROR: 55000

How to Fix PostgreSQL 'Object Not in Prerequisite State' Error (2025)

PostgreSQL
Error

ERROR: 55000

How to Fix PostgreSQL 'Cannot Execute DDL in a Read-Only Transaction' (2025)

PostgreSQL
Critical

ERROR: 55006

How to Fix PostgreSQL ERROR 55006 (Catalog Cache Lookup Failed) in 2025

Redis
Critical

MISCONF / NOREPLICAS

Root Cause Analysis: Why Redis Cluster Fails Over in High Throughput Scenarios

Redis
Critical

MISCONF

How to Fix Redis MISCONF: Persistence Save Failed

Redis
Critical

NOAUTH

How to Fix Redis NOAUTH Authentication Required

Redis
Critical

OOM

How to Fix Redis OOM command not allowed (Maxmemory)

Redis
Critical

MISCONF

Root Cause Analysis: Why Redis MISCONF Persistence Errors Happen

Redis
Critical

MISCONF

Root Cause Analysis: Why Redis 7.4 'MISCONF' Persistence Errors Happen in Kubernetes

SQL Server
Error

Msg 1205

Troubleshooting Guide: SQL Server Deadlock (Msg 1205) in 2026

SQL Server
Critical

Msg 1105

Troubleshooting Guide: SQL Server 2022 'Could Not Allocate Space' (Msg 1105)

SQL Server
Critical

Error: 1204

SQL Server Lock Escalation Troubleshooting Guide (2025)

SQL Server
Critical

Msg 18456

How to Fix SQL Server Msg 18456: Login Failed for User

Container

23
Docker
Error

BuildKit Error

How to Fix Docker Build Failed to Solve Process

Docker
Critical

Driver Failed

How to Fix Docker Driver Failed Programming External Connectivity

Docker
Error

OCI Runtime Error

How to Fix Docker OCI Runtime Create Failed: Permission Denied

Docker
Critical

No Space Left on Device

Root Cause Analysis: Why Docker Fails with 'No Space Left on Device'

Docker
Critical

SSL Handshake Failed

Solved: Docker SSL Handshake Failed Error with Private Registry

Kubernetes
Critical

502 Bad Gateway

How to Fix Kubernetes 502 Bad Gateway from Ingress-NGINX (K8s 1.30+)

Kubernetes
Critical

502 Bad Gateway

How to Fix Kubernetes 502 Bad Gateway with Istio Service Mesh (2025)

Kubernetes
Critical

502 Bad Gateway

How to Fix Kubernetes 502 Bad Gateway in Ingress (K8s 1.31+)

Kubernetes
Critical

CrashLoopBackOff

How to Fix K8s CrashLoopBackOff: Probe Failures & Resources

Kubernetes
Critical

FailedMount

How to Fix Kubernetes FailedMount: Volume Mount Error

Kubernetes
Critical

ImagePullBackOff

How to Fix Kubernetes ErrImagePull / ImagePullBackOff

Kubernetes
Critical

SchedulingFailed

How to Fix Kubernetes 0/3 Nodes Are Available (Scheduling Failed)

Kubernetes
Error

Probe Failed

How to Fix Kubernetes Probe Failed: Connection Refused

Kubernetes
Error

ImagePullBackOff

How to Fix Kubernetes ImagePullBackOff

Kubernetes
Critical

ImagePullBackOff

How to Fix K8s ImagePullBackOff: Registry Authentication

Kubernetes
Critical

CrashLoopBackOff

How to Troubleshoot Kubernetes Pod CrashLoopBackOff Loop

Kubernetes
Error

FailedScheduling

Kubernetes Pod Scheduling Troubleshooting Guide: Node Affinity & Taints

Kubernetes
Error

FailedScheduling

Kubernetes Troubleshooting Guide: Diagnosing Pod FailedScheduling Errors

Kubernetes
Error

FailedScheduling

Kubernetes Troubleshooting Guide: Diagnosing Pod Scheduling Failures

Docker
Critical

No space left on device

Root Cause Analysis: Docker 'No Space Left on Device' and OverlayFS

Docker
Critical

No space left on device

Root Cause Analysis: Why Docker 'No Space Left on Device' Happens with ZFS

Docker
Critical

SSL Handshake Failed

Solved: Docker SSL Handshake Failed with AWS ECR (2025)

Docker
Critical

SSL Handshake Failed

Solved: Docker SSL Handshake Failed with GCP Artifact Registry

HTTP & Web

24
Apache
Error

403

How to Fix Apache 403 Forbidden Error

Apache
Warning

408

How to Fix Apache 408 Request Timeout

Apache
Critical

500

How to Fix Apache 500 Internal Server Error

Apache
Error

AH01630

How to Fix Apache AH01630: Client Denied by Configuration

Apache
Critical

AH00094

How to Fix Apache AH00094: Command Line Exceeded Limit in 2.4.60+

Nginx
Critical

AH01071

How to Fix Nginx AH01071: Got error 'Primary script unknown' (PHP-FPM 2026)

Nginx
Critical

SSL_do_handshake() failed (SSL: error:0A000126:SSL routines::unexpected eof while reading)

How to Fix Nginx SSL Handshake EOF Error in 2025

Nginx
Critical

SSL_do_handshake() failed

How to Fix Nginx SSL Handshake Failed (SSL_do_handshake) in 2025

HTTP Protocol
Warning

429

How to Fix HTTP 429 Too Many Requests Error

Nginx
Critical

502

How to Fix Nginx 502

Nginx
Error

400

How to Fix Nginx 400 Bad Request (Invalid Host)

Nginx
Error

413

How to Fix Nginx 413 Request Entity Too Large

Nginx
Warning

499

How to Fix Nginx 499 Client Closed Request

Nginx
Warning

504

How to Fix Nginx 504 Gateway Time-out Error

Nginx
Error

Upstream Error

How to Fix Nginx: Connection Refused While Connecting to Upstream

Nginx
Error

Upstream Error

How to Fix Nginx Upstream: Firewall Connection Refused

HTTP Protocol
Warning

HTTP/2 Stream Reset (RST_STREAM)

Root Cause Analysis: Why HTTP/2 Stream Reset (RST_STREAM) Happens

Nginx
Error

upstream sent invalid chunked response

Root Cause Analysis: Why Nginx Fails with 'Invalid Chunked Response' from Upstream

Nginx
Error

EPIPE, ECONNRESET

Root Cause Analysis: Why Nginx Upstream Connections Fail with EPIPE/ECONNRESET

Apache
Critical

AH00111

Solved: Apache AH00111 Config Variable Overflow in httpd 2.4.60+

Apache
Critical

AH00124: Request exceeded the limit of 10 internal redirects due to probable configuration error.

Solved: Apache Infinite Redirect Loop Error (AH00124) in Apache 2.4.62+

HTTP Protocol
Error

HTTP/2 Connection Preface Mismatch & GOAWAY Frames

Troubleshooting Guide: HTTP/2 Connection Failures and GOAWAY Frames

HTTP Protocol
Error

HTTP/2 Stream Error

Troubleshooting Guide: HTTP/2 Stream Reset (RST_STREAM) & GOAWAY Frames

Nginx
Error

upstream sent too big header

Troubleshooting Guide: Nginx 'upstream sent too big header' Error