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troubleshooting

664 articles · Page 4 of 7
Open Source Linux
Open Source Linux
May 28, 2024 · Backend Development

How to Diagnose and Fix Common Embedded Development Issues

This guide explains why embedded development seems difficult and provides a systematic approach to reproducing, locating, analyzing, and resolving typical embedded problems—including simulation conditions, log printing, online debugging, version rollback, binary search commenting, register snapshots, stack overflow, and hardware quirks—plus regression testing and experience summary.

DebuggingFirmwareembedded
0 likes · 11 min read
How to Diagnose and Fix Common Embedded Development Issues
Aikesheng Open Source Community
Aikesheng Open Source Community
May 23, 2024 · Databases

Troubleshooting SQL Exception Retries in OceanBase Using Logs and gv$sql_audit

This article demonstrates how to diagnose and resolve repeated UPDATE failures in OceanBase by extracting information from Top SQL, log files, and the gv$sql_audit view, identifying error codes such as 6005, 6003, and 6212, and applying corrective actions like adjusting timeout settings, killing lock‑holding sessions, and checking lock statistics.

DatabaseErrorCodesOceanBase
0 likes · 12 min read
Troubleshooting SQL Exception Retries in OceanBase Using Logs and gv$sql_audit
Efficient Ops
Efficient Ops
May 22, 2024 · Operations

Essential Ops Troubleshooting: 10 Quick Fixes and 22 Common Failure Cases

This guide compiles the most frequent Linux and network problems faced by operations engineers—ranging from non‑executing shell scripts and cron output issues to read‑only filesystems, disk space leaks, and service start failures—providing clear causes and step‑by‑step solutions for each case.

Cronnetworktroubleshooting
0 likes · 18 min read
Essential Ops Troubleshooting: 10 Quick Fixes and 22 Common Failure Cases
Liangxu Linux
Liangxu Linux
Apr 19, 2024 · Operations

Step-by-Step Guide to Diagnose High CPU Usage on Linux

This guide walks you through checking CPU usage, system load, resource consumption, problematic processes, system logs, and performance bottlenecks on a Linux server using common command‑line tools such as top, uptime, pidstat, strace, tail, and perf.

CPUOperationsPerformance
0 likes · 3 min read
Step-by-Step Guide to Diagnose High CPU Usage on Linux
Eric Tech Circle
Eric Tech Circle
Apr 13, 2024 · Operations

Stop Your MacBook’s Overnight Battery Drain: Proven Power Settings Tweaks

After experiencing up to 50% battery loss overnight when the MacBook lid is closed, the author diagnosed the issue using pmset, identified Bluetooth and Handoff as culprits, and applied three configuration changes—including disabling network wake, turning off Handoff, and using Bluesnooze—to reduce nightly drain to under 5%.

batterybluesnoozemacOS
0 likes · 5 min read
Stop Your MacBook’s Overnight Battery Drain: Proven Power Settings Tweaks
Alibaba Cloud Developer
Alibaba Cloud Developer
Apr 8, 2024 · Databases

How I Rescued a MySQL Table After Massive Bad Data Insertion

When a user reported errors, I discovered a MySQL table flooded with millions of bad rows from a new group, causing slow queries and crashes; I detail the step‑by‑step investigation, failed attempts with DELETE and lock‑free changes, and the final successful rebuild using temporary tables, DROP, TRUNCATE, and index reconstruction.

DDLDatabaseIndexing
0 likes · 13 min read
How I Rescued a MySQL Table After Massive Bad Data Insertion
Sanyou's Java Diary
Sanyou's Java Diary
Mar 4, 2024 · Fundamentals

Master JVM Memory Troubleshooting: A Complete Step‑by‑Step Guide

This comprehensive guide presents a systematic, step‑by‑step process for diagnosing JVM memory problems—including heap, Metaspace, DirectMemory, JNI memory, and stack issues—using Alibaba Cloud ARMS, ATP, standard JDK tools, and best‑practice commands to quickly locate root causes and apply effective solutions.

GCJVMMemory
0 likes · 56 min read
Master JVM Memory Troubleshooting: A Complete Step‑by‑Step Guide
MaGe Linux Operations
MaGe Linux Operations
Jan 21, 2024 · Big Data

Master Kafka: Core Concepts, Metrics, and Troubleshooting Guide

This article explains Kafka's fundamental components, version evolution, key monitoring metrics for producers, brokers, consumers and Zookeeper, and provides step‑by‑step troubleshooting methods for common issues such as slow topic throughput and message backlog.

Big DataKafkaMessage Queue
0 likes · 8 min read
Master Kafka: Core Concepts, Metrics, and Troubleshooting Guide
IT Services Circle
IT Services Circle
Jan 17, 2024 · Operations

Common Reasons Why Cloud Server Ports Are Unreachable and How to Fix Them

This article lists the most frequent causes—such as an unstarted application, incorrect port listening, cloud security‑group settings, firewall rules, application‑level IP restrictions, network problems, and user‑side issues—and provides step‑by‑step commands and screenshots to help troubleshoot and restore access to cloud server ports.

Security Groupcloudfirewall
0 likes · 8 min read
Common Reasons Why Cloud Server Ports Are Unreachable and How to Fix Them
Liangxu Linux
Liangxu Linux
Jan 13, 2024 · Operations

Step‑by‑Step Guide to Diagnose High CPU Usage on Linux

This guide walks you through checking CPU usage, system load, process resources, tracing problematic processes, reviewing system logs, and using performance tools like perf to pinpoint and resolve Linux server bottlenecks.

CPUPerformancelinux
0 likes · 3 min read
Step‑by‑Step Guide to Diagnose High CPU Usage on Linux
Python Crawling & Data Mining
Python Crawling & Data Mining
Dec 19, 2023 · Fundamentals

How to Fix Matplotlib Title Encoding Errors in Python

This article walks through a common Matplotlib title garbling issue caused by encoding settings, explains why the 'encoding' argument triggers an AttributeError, and provides a concise code fix using font configuration to display Chinese characters correctly.

MatplotlibPythonencoding
0 likes · 3 min read
How to Fix Matplotlib Title Encoding Errors in Python
Architecture Digest
Architecture Digest
Dec 15, 2023 · Operations

Diagnosing High CPU and Frequent GC in a Java Container: A Step‑by‑Step Analysis

When a production container suddenly hit over 90% CPU and excessive JVM garbage collection, the author walks through entering the pod, using top and top‑H to locate the offending thread, extracting its stack with jstack, downloading the data via a simple HTTP server, and ultimately discovering an Excel export routine that caused massive object allocation, fixing the code and restoring stability.

CPUGCJVM
0 likes · 6 min read
Diagnosing High CPU and Frequent GC in a Java Container: A Step‑by‑Step Analysis
Liangxu Linux
Liangxu Linux
Dec 11, 2023 · Fundamentals

Master Network Troubleshooting: Essential Steps and Commands for Any Environment

This guide walks you through the essential preconditions, core principles, and step‑by‑step procedures—including physical link checks, IP/DNS verification, gateway testing, public IP pinging, and DNS validation—using Windows and Linux commands to reliably diagnose and resolve network issues.

IT OperationsOSI modelTCP/IP
0 likes · 14 min read
Master Network Troubleshooting: Essential Steps and Commands for Any Environment
Efficient Ops
Efficient Ops
Dec 3, 2023 · Backend Development

Why Our Redis Cluster Pipeline Deadlocked: Thread Locks Explained

This article walks through a production incident where a Redis Cluster pipeline caused Dubbo threads to block and eventually deadlock, detailing the root‑cause analysis, code inspection, and verification steps using jstack, jmap, and MAT to confirm the deadlock and propose fixes.

DeadlockJavaPerformance
0 likes · 13 min read
Why Our Redis Cluster Pipeline Deadlocked: Thread Locks Explained
vivo Internet Technology
vivo Internet Technology
Nov 22, 2023 · Operations

Investigation and Resolution of Elasticsearch node_concurrent_recoveries Performance Issue

The team traced read‑request timeouts to a single overloaded Elasticsearch node where an excessively high node_concurrent_recoveries setting caused many simultaneous shard recoveries and disk‑watermark‑driven relocations, and resolved the issue by lowering concurrent recoveries, enabling adaptive replica selection, and adjusting allocation settings.

CPUClusterElasticsearch
0 likes · 16 min read
Investigation and Resolution of Elasticsearch node_concurrent_recoveries Performance Issue
Efficient Ops
Efficient Ops
Nov 20, 2023 · Databases

Why Is My Redis Slowing Down? 10 Common Causes and How to Fix Them

This article explains why Redis may become slower, covering benchmark testing, high‑complexity commands, big keys, concentrated expirations, memory limits, fork overhead, huge pages, AOF settings, CPU binding, swap usage, memory fragmentation, and lazy‑free mechanisms, and provides practical optimization steps.

OptimizationPerformanceRedis
0 likes · 34 min read
Why Is My Redis Slowing Down? 10 Common Causes and How to Fix Them
dbaplus Community
dbaplus Community
Nov 16, 2023 · Cloud Native

Master Kubernetes Troubleshooting: From Pod Failures to DNS Issues

This guide walks through a systematic approach to diagnosing Kubernetes problems, covering pod startup failures, cluster health checks, event logs, pod status, network and storage verification, container logs, DNS service checks, and provides practical commands and tips for each step.

ClusterDNSKubernetes
0 likes · 10 min read
Master Kubernetes Troubleshooting: From Pod Failures to DNS Issues
ITPUB
ITPUB
Nov 10, 2023 · Databases

Why Does MySQL Replication Lag? Causes and Practical Fixes

This article explains what MySQL master‑slave replication lag is, walks through the replication workflow, identifies the main technical reasons for delay such as single‑threaded replay and lock contention, and provides concrete configuration and architectural solutions to reduce or eliminate the lag.

LagMySQLPerformance
0 likes · 8 min read
Why Does MySQL Replication Lag? Causes and Practical Fixes
LouZai
LouZai
Oct 30, 2023 · Databases

How to Diagnose and Fix MySQL Master‑Slave Replication Lag

The article explains what MySQL master‑slave replication lag is, analyzes why it occurs—especially during relay‑log replay and large DDL/DML operations—and provides concrete configuration, hardware, and architectural solutions to reduce or eliminate the delay.

ConfigurationLagMaster‑Slave
0 likes · 8 min read
How to Diagnose and Fix MySQL Master‑Slave Replication Lag
DevOps
DevOps
Oct 17, 2023 · Databases

Fundamental Methods for Service Troubleshooting and Redis Performance Optimization

After encountering latency spikes in a service, the article walks through systematic troubleshooting steps—examining module performance, resource metrics, and network latency—followed by detailed Redis diagnostics using metrics, latency commands, and profiling tools, ultimately recommending scaling, rate limiting, and caching strategies to resolve the issue.

Redistroubleshooting
0 likes · 22 min read
Fundamental Methods for Service Troubleshooting and Redis Performance Optimization
Efficient Ops
Efficient Ops
Oct 15, 2023 · Databases

How to Diagnose and Fix Slow Redis Responses: A Step-by-Step Guide

This article walks through practical methods for troubleshooting slow service alerts, diagnosing Redis performance bottlenecks, and reproducing issues with local demos and load simulations, offering concrete metrics, command‑line checks, and mitigation strategies such as scaling, rate‑limiting, and pipeline optimization.

OperationsPerformanceRedis
0 likes · 22 min read
How to Diagnose and Fix Slow Redis Responses: A Step-by-Step Guide
Spring Full-Stack Practical Cases
Spring Full-Stack Practical Cases
Oct 9, 2023 · Backend Development

Master JDK Command-Line Tools for Java Troubleshooting

This guide explains how to use JDK command-line utilities such as jps, jstat, jinfo, jmap, jhat, and jstack to monitor JVM processes, inspect memory usage, generate heap dumps, and diagnose performance issues, providing command syntax, options, and practical examples.

command-line-toolsjmapjps
0 likes · 8 min read
Master JDK Command-Line Tools for Java Troubleshooting
Tencent Cloud Developer
Tencent Cloud Developer
Sep 28, 2023 · Databases

Redis Service Latency Diagnosis and Optimization – A Systematic Approach

The article outlines a systematic three‑step workflow—general service diagnostics, Redis‑specific checks, and reproducible load testing—to pinpoint a hot‑key‑driven CPU bottleneck, then evaluates mitigation options such as read‑write separation, pipelining, and an application‑level cache, ultimately showing the cache’s effectiveness in cutting latency and CPU usage.

CachePerformanceRedis
0 likes · 21 min read
Redis Service Latency Diagnosis and Optimization – A Systematic Approach
Liangxu Linux
Liangxu Linux
Sep 27, 2023 · Information Security

Mastering tcpdump: Practical Commands for Network Packet Capture and Analysis

This guide explains how to use tcpdump for network packet capture, covering basic usage, interface selection, host and port filtering, logical expressions, saving captures, limiting packet counts, and real‑world troubleshooting of a Node.js service behind Nginx.

Command Linenetwork analysispacket capture
0 likes · 7 min read
Mastering tcpdump: Practical Commands for Network Packet Capture and Analysis
Top Architect
Top Architect
Sep 19, 2023 · Backend Development

Analyzing and Resolving Unexpected JVM GC Spikes in Production

This article recounts a production incident where a container's CPU spiked due to abnormal JVM garbage collection, walks through step-by-step diagnostics using top, jstack, and thread analysis, explains the root cause in an Excel export routine, and concludes with a brief promotion of a ChatGPT community.

DockerGarbage CollectionJVM
0 likes · 8 min read
Analyzing and Resolving Unexpected JVM GC Spikes in Production
Architect
Architect
Sep 16, 2023 · Operations

Common Production Failures and Their Handling Procedures

This article outlines the most common production failures—including network, server, database, software bugs, security vulnerabilities, storage, configuration errors, and third‑party service issues—and provides detailed steps for detection, investigation, and resolution to ensure system stability and reliability.

OperationsProductionincident management
0 likes · 28 min read
Common Production Failures and Their Handling Procedures
Java Captain
Java Captain
Sep 15, 2023 · Fundamentals

How to Connect a Desktop Computer to Wi‑Fi: A Detailed Guide

This guide explains step‑by‑step how to verify hardware, configure a desktop PC’s wireless adapter, connect to a Wi‑Fi network, troubleshoot common issues, and apply preventive measures to ensure a stable and secure connection.

DesktopHardwareWiFi
0 likes · 5 min read
How to Connect a Desktop Computer to Wi‑Fi: A Detailed Guide
JD Retail Technology
JD Retail Technology
Sep 1, 2023 · Backend Development

Root Cause Analysis and Resolution of Disk Usage Alert in a Java Application

After a Java system went live, a disk usage alert exceeding 90% prompted an investigation that uncovered a third‑party jar’s debug‑level Log4j configuration writing large logs to the root directory, and the issue was resolved by excluding the offending jar via Maven, highlighting the need for careful dependency management.

JavaMavenbackend
0 likes · 4 min read
Root Cause Analysis and Resolution of Disk Usage Alert in a Java Application
IT Services Circle
IT Services Circle
Aug 19, 2023 · Operations

How to Fix Printer Sharing Issues on Windows 7, 10, and 11

This guide explains why printer sharing often fails across Windows 7, 10, and 11, and provides a four‑step solution—including a downloadable toolkit, batch scripts for different OS versions, and optional methods to disable system updates—so users can restore shared printing functionality.

batch scriptprinter sharingtroubleshooting
0 likes · 4 min read
How to Fix Printer Sharing Issues on Windows 7, 10, and 11
Code Ape Tech Column
Code Ape Tech Column
Aug 14, 2023 · Operations

Using Arthas to Diagnose High CPU Issues in a Java Application

This article demonstrates how to use Alibaba's open‑source Java diagnostic tool Arthas to quickly locate and fix high CPU usage in a Java application, covering installation, attaching to a JVM, using dashboard, thread, jad, watch, and ognl commands, and interpreting the results.

ArthasCPUJava
0 likes · 8 min read
Using Arthas to Diagnose High CPU Issues in a Java Application
Architect's Guide
Architect's Guide
Aug 12, 2023 · Databases

Why Redis Becomes Slow and How to Optimize It

This article explains the common reasons why Redis performance degrades—such as network latency, high‑complexity commands, big keys, concentrated expirations, memory limits, fork overhead, huge pages, AOF settings, CPU binding, swap usage, and memory fragmentation—and provides detailed optimization and troubleshooting steps to restore low latency.

DatabaseMemoryOptimization
0 likes · 34 min read
Why Redis Becomes Slow and How to Optimize It
MaGe Linux Operations
MaGe Linux Operations
Jul 22, 2023 · Operations

Why Is Your Network Dropping Packets? A Complete Troubleshooting Guide

This article explains the common causes of network packet loss—from hardware NIC issues and driver problems to kernel stack and TCP/UDP layer faults—provides step‑by‑step diagnostic commands, and offers practical solutions to quickly identify and resolve packet loss in Linux environments.

UDPpacket losstroubleshooting
0 likes · 36 min read
Why Is Your Network Dropping Packets? A Complete Troubleshooting Guide
Java High-Performance Architecture
Java High-Performance Architecture
Jul 19, 2023 · Databases

Why Is Redis Slowing Down? 11 Common Causes and How to Fix Them

This article explains the typical reasons why a Redis instance becomes slow—such as high latency, expensive commands, big keys, concentrated expirations, memory limits, fork overhead, huge pages, AOF settings, CPU binding, swap usage, and memory fragmentation—and provides concrete diagnostics and optimization steps to resolve each issue.

OptimizationRedistroubleshooting
0 likes · 34 min read
Why Is Redis Slowing Down? 11 Common Causes and How to Fix Them
Test Development Learning Exchange
Test Development Learning Exchange
Jul 18, 2023 · Operations

Common System Performance Issues and Their Solutions

This article enumerates typical system performance problems such as slow response time, insufficient throughput, resource bottlenecks, database slowness, memory leaks, platform differences, network latency, security overhead, scalability limits, and provides practical optimization and mitigation strategies for each.

Systemsmonitoringscalability
0 likes · 7 min read
Common System Performance Issues and Their Solutions
Liangxu Linux
Liangxu Linux
Jul 12, 2023 · Operations

How to Quickly Resolve Docker Network IP Address Conflicts

This guide explains why Docker network IP address conflicts occur and provides step‑by‑step commands to locate duplicate IPs, stop conflicting containers, manually reassign IPs, and fully clean and restart the Docker environment to eliminate the issue.

containerip-conflictnetwork
0 likes · 5 min read
How to Quickly Resolve Docker Network IP Address Conflicts
MaGe Linux Operations
MaGe Linux Operations
Jun 3, 2023 · Cloud Native

Decoding Container Exit Codes: What They Mean and How to Troubleshoot Them

Understanding container exit codes—from 0 for normal termination to 255 for unknown errors—helps diagnose pod failures in Docker and Kubernetes, covering each code’s meaning, typical causes, and step‑by‑step troubleshooting actions to resolve issues such as command errors, permission problems, signals, and resource limits.

DockerExit Codescontainer
0 likes · 15 min read
Decoding Container Exit Codes: What They Mean and How to Troubleshoot Them
Efficient Ops
Efficient Ops
May 22, 2023 · Operations

Fix Common Kubernetes Errors: ImagePullBackOff, CrashLoopBackOff & More

This guide walks operators and developers through diagnosing and resolving frequent Kubernetes issues such as ImagePullBackOff, CrashLoopBackOff, OOMKilled, BackoffLimitExceeded, and probe failures, providing key kubectl commands, secret handling tips, and best‑practice recommendations to keep clusters stable.

CrashLoopBackOffImagePullBackOffKubernetes
0 likes · 11 min read
Fix Common Kubernetes Errors: ImagePullBackOff, CrashLoopBackOff & More
Alibaba Cloud Native
Alibaba Cloud Native
May 22, 2023 · Cloud Native

Why Duplicate Dubbo References Crash ZooKeeper and How to Fix It

Improper initialization of multiple identical Dubbo References can flood ZooKeeper with duplicate consumer nodes, causing instability and service outages, but adjusting jute.maxbuffer, upgrading Dubbo, and using MSE ZooKeeper's rate‑limiting and monitoring can resolve the issue.

Zookeepercloud nativeservice registry
0 likes · 6 min read
Why Duplicate Dubbo References Crash ZooKeeper and How to Fix It
Tencent Cloud Developer
Tencent Cloud Developer
May 8, 2023 · Cloud Native

Troubleshooting Common Kubernetes Networking Issues: Cross-VPC NodePort Timeouts, LB Pressure Test CPS Low, DNS Delays, and More

This guide walks through eight frequent Kubernetes networking problems in Tencent Cloud Kubernetes Service—such as cross‑VPC NodePort timeouts, low load‑balancer CPS, DNS resolution delays, apiserver access lag, mis‑configured resolv.conf, liveness‑probe failures, and externalTrafficPolicy = Local timeouts—explaining their root causes and providing concrete kernel, iptables, DNS, and configuration fixes.

DNSKubernetesLB
0 likes · 29 min read
Troubleshooting Common Kubernetes Networking Issues: Cross-VPC NodePort Timeouts, LB Pressure Test CPS Low, DNS Delays, and More
Aikesheng Open Source Community
Aikesheng Open Source Community
Apr 27, 2023 · Databases

Diagnosing Freeze and Dump Issues in OceanBase Memstore

This article explains how to verify whether OceanBase's freeze mechanism and memstore dump processes are functioning correctly by querying internal tables, inspecting logs, and checking related metrics such as active_memstore_used, major_freeze_trigger, and MemTable reference counts.

DUMPDatabase AdministrationFreeze
0 likes · 14 min read
Diagnosing Freeze and Dump Issues in OceanBase Memstore
Liangxu Linux
Liangxu Linux
Apr 9, 2023 · Operations

Master Wireshark: Advanced Packet Filtering, Timing, and Analysis Techniques

This guide walks through Wireshark's powerful features—including precise packet filtering, time‑display adjustments, absolute sequence numbering, exporting filtered captures, traffic statistics, decoding mixed logs, TCP stream tracing, and MAC‑address vendor lookup—to help engineers troubleshoot and analyze network traffic efficiently.

FilteringTCPWireshark
0 likes · 6 min read
Master Wireshark: Advanced Packet Filtering, Timing, and Analysis Techniques
php Courses
php Courses
Mar 23, 2023 · Backend Development

How to Resolve Composer Dependency Errors in Laravel Projects

This guide explains how to fix common Composer dependency errors in a Laravel project by backing up and removing the composer.lock file, reinstalling dependencies, and restoring the lock file, while also showing the typical error messages that may appear.

backenddependencytroubleshooting
0 likes · 3 min read
How to Resolve Composer Dependency Errors in Laravel Projects
Python Crawling & Data Mining
Python Crawling & Data Mining
Feb 28, 2023 · Backend Development

How to Fix Common Python Web‑Crawler Issues in PyCharm

This article walks through a Python web‑crawler problem raised in a community, showing step‑by‑step how to start the project, troubleshoot terminal errors in PyCharm, and verify the directory structure using the tree command, providing a clear solution for beginners.

PythonWeb Crawlertroubleshooting
0 likes · 3 min read
How to Fix Common Python Web‑Crawler Issues in PyCharm
Big Data Technology & Architecture
Big Data Technology & Architecture
Feb 24, 2023 · Big Data

Common Flink Task Submission Issues and Solutions on YARN

This article compiles frequent Flink job submission problems on YARN—including WordCount jar errors, HBase dependency conflicts, MySQL timeout, checkpoint restoration failures, parallelism limits, and unexpected container termination—provides root‑cause analysis and step‑by‑step remediation instructions.

Big DataCheckpointFlink
0 likes · 21 min read
Common Flink Task Submission Issues and Solutions on YARN
Python Crawling & Data Mining
Python Crawling & Data Mining
Feb 16, 2023 · Fundamentals

How to Quickly Fix Common Python pip Upgrade Errors

This article walks through a common Python pip upgrade error, shows the error screenshots, explains why it occurs, and provides a concise two‑command solution that restores the Python environment, helping readers quickly resolve similar issues.

environmentpiptroubleshooting
0 likes · 3 min read
How to Quickly Fix Common Python pip Upgrade Errors
Efficient Ops
Efficient Ops
Feb 7, 2023 · Operations

Why Did kube-apiserver OOM? A Deep Dive into Kubernetes Control‑Plane Failures

This article details a real‑world Kubernetes control‑plane outage where kube‑apiserver repeatedly OOM‑killed, examines cluster metrics, logs, heap and goroutine profiles, explores root‑cause hypotheses such as etcd latency and DeleteCollection memory leaks, and offers practical prevention steps.

OOMetcdkube-apiserver
0 likes · 19 min read
Why Did kube-apiserver OOM? A Deep Dive into Kubernetes Control‑Plane Failures
Efficient Ops
Efficient Ops
Jan 5, 2023 · Operations

Master Network Troubleshooting with nali, dig, mtr, and tsunami

This guide introduces four powerful network utilities—nali for IP geolocation, dig for DNS queries, mtr for combined traceroute and ping analysis, and tsunami for high‑speed UDP transfers—explaining their installation, key commands, options, and practical usage examples.

Network ToolsTsunamidig
0 likes · 7 min read
Master Network Troubleshooting with nali, dig, mtr, and tsunami
Aikesheng Open Source Community
Aikesheng Open Source Community
Dec 26, 2022 · Databases

MySQL Replication Delay Analysis and Troubleshooting for Large Transactions

The article describes a MySQL 5.7.31 replication delay where Seconds_Behind_Master fluctuates between 0 and over 10,000 seconds, analyzes root causes such as single‑threaded replication, large or long‑running transactions, and provides preventive, diagnostic, and remediation steps including enabling parallel replication and using the infobin tool.

DatabaseLarge TransactionsMySQL
0 likes · 10 min read
MySQL Replication Delay Analysis and Troubleshooting for Large Transactions
Open Source Linux
Open Source Linux
Dec 23, 2022 · Operations

Essential Linux Network Commands for Troubleshooting and Management

This guide explains key Linux networking commands—including ip, ifconfig, netstat, ping, traceroute, DNS utilities, and DHCP tools—showing how to view interfaces, check connectivity, trace routes, query DNS records, and manage DHCP leases for effective network troubleshooting.

DHCPnetworktroubleshooting
0 likes · 8 min read
Essential Linux Network Commands for Troubleshooting and Management
Sohu Tech Products
Sohu Tech Products
Dec 7, 2022 · Databases

How to Diagnose and Resolve Redis Performance Issues

This article explains how to identify Redis latency problems, measure baseline performance, monitor slow commands, and address common causes such as network RTT, forked RDB snapshots, transparent huge pages, swap usage, AOF configuration, key expiration bursts, and big keys, providing practical solutions and a checklist for remediation.

DatabaseOptimizationPerformance
0 likes · 18 min read
How to Diagnose and Resolve Redis Performance Issues
Aikesheng Open Source Community
Aikesheng Open Source Community
Dec 5, 2022 · Databases

Greenplum Standby Failure Diagnosis and Recovery Procedure

This article describes how to identify and fix Greenplum standby segment failures by inspecting segment status, comparing missing files, generating a recovery configuration, executing gprecoverseg commands, and verifying that all segments return to normal operation without service interruption.

DatabaseGreenplumRecovery
0 likes · 17 min read
Greenplum Standby Failure Diagnosis and Recovery Procedure
政采云技术
政采云技术
Nov 24, 2022 · Databases

Is Redis Really Slowing Down? A Comprehensive Diagnosis and Optimization Guide

This article explains how to determine whether Redis is truly experiencing latency issues, outlines benchmark testing methods, identifies common causes such as network problems, high‑complexity commands, big keys, slow logs, memory limits, fork overhead, AOF configuration, swap usage, fragmentation, and provides practical troubleshooting and optimization steps.

DatabaseRedislatency
0 likes · 26 min read
Is Redis Really Slowing Down? A Comprehensive Diagnosis and Optimization Guide
Aikesheng Open Source Community
Aikesheng Open Source Community
Nov 21, 2022 · Databases

Troubleshooting OBproxy Deployment: Fixing Lost Connection Error Caused by Wrong Root Service List Port

This article details a step‑by‑step troubleshooting process for an OBproxy deployment error where a client loses connection to the OceanBase server due to an incorrect port in the root service list, including environment setup, command examples, log analysis, and the final resolution.

Database ProxyOceanBaseRoot Service List
0 likes · 9 min read
Troubleshooting OBproxy Deployment: Fixing Lost Connection Error Caused by Wrong Root Service List Port
Full-Stack DevOps & Kubernetes
Full-Stack DevOps & Kubernetes
Nov 18, 2022 · Cloud Native

Top 10 Common Kubernetes Issues and How to Fix Them

This guide walks through ten frequent Kubernetes problems—from service access failures and port‑mapping errors to image pull issues and CrashLoopBackOff—explaining root causes, showing exact error messages, and providing concise command‑line solutions to restore cluster health.

DevOpsKubernetescloud-native
0 likes · 6 min read
Top 10 Common Kubernetes Issues and How to Fix Them
Alibaba Cloud Native
Alibaba Cloud Native
Nov 9, 2022 · Cloud Native

13 Common Kubernetes Pod Failures and How to Diagnose Them

This article outlines the Kubernetes pod lifecycle, describes the five pod phases, enumerates 13 typical failure scenarios—including scheduling, image pull, dependency, init container, probe, and OOM issues—provides error states, root causes, and step‑by‑step kubectl commands for diagnosis and remediation.

KubernetesOperationscloud native
0 likes · 22 min read
13 Common Kubernetes Pod Failures and How to Diagnose Them
Open Source Linux
Open Source Linux
Nov 3, 2022 · Fundamentals

How to Set Up Port Forwarding for Remote Access: A Step-by-Step Guide

This guide explains what port forwarding (port mapping) is, why it’s useful for remote access, and provides detailed instructions on configuring it on a router, using public IP or dynamic DNS, plus common troubleshooting tips to ensure external users can reach internal services.

NATRemote AccessRouter configuration
0 likes · 7 min read
How to Set Up Port Forwarding for Remote Access: A Step-by-Step Guide
ShiZhen AI
ShiZhen AI
Oct 25, 2022 · Operations

How to Diagnose Unexpected Errors When Adding a New Kafka Consumer Group

When starting a new Kafka consumer group, an unexpected SyncGroup error occurs due to a RecordTooLargeException, and the article walks through log inspection, identifies the oversized __consumer_offsets record, and resolves the issue by increasing the message.max.bytes configuration.

Consumer GroupKafkaRecordTooLargeException
0 likes · 5 min read
How to Diagnose Unexpected Errors When Adding a New Kafka Consumer Group
NetEase Yanxuan Technology Product Team
NetEase Yanxuan Technology Product Team
Oct 24, 2022 · Operations

PAM Authentication Troubleshooting: Real-World Linux Server Failure Cases and Solutions

Real‑world Linux server failures show that missing PAM support in SSH prevents ulimit changes, misordered pam_faillock entries break cron authentication, and custom pam_script setups for Squid require careful configuration, highlighting that module order, thorough testing, and proper hardening are essential for reliable PAM authentication.

Linux authenticationPAMSystem Security
0 likes · 11 min read
PAM Authentication Troubleshooting: Real-World Linux Server Failure Cases and Solutions
Aikesheng Open Source Community
Aikesheng Open Source Community
Oct 19, 2022 · Operations

Analyzing OceanBase Error Logs to Locate Error Causes

This article explains the types and formats of OceanBase logs, how to identify relevant log files, interpret log fields such as trace_id, lt, and dc, and provides step-by-step methods for using error codes and trace IDs to pinpoint the root cause of errors.

DatabaseOperationsErrorLogOceanBase
0 likes · 16 min read
Analyzing OceanBase Error Logs to Locate Error Causes
Cloud Native Technology Community
Cloud Native Technology Community
Oct 17, 2022 · Cloud Native

A Three‑Step Approach to Understanding, Managing, and Preventing Kubernetes Failures

This article presents a practical three‑step methodology—understanding, managing, and preventing—to troubleshoot Kubernetes deployments, explains how to leverage monitoring, observability, and incident‑response tools, and offers guidance on fostering team collaboration and building resilient, self‑healing cloud‑native systems.

KubernetesOperationscloud native
0 likes · 7 min read
A Three‑Step Approach to Understanding, Managing, and Preventing Kubernetes Failures
Open Source Linux
Open Source Linux
Oct 14, 2022 · Cloud Native

Why Did Our kube-apiserver OOM? A Deep Dive into Kubernetes Control‑Plane Failures

On September 10 2021, a Kubernetes cluster experienced intermittent kubectl hangs caused by kube-apiserver OOM kills, leading to cascading control-plane failures; this article details the environment, observed metrics, log analysis, code inspection of DeleteCollection, and provides troubleshooting steps to prevent similar incidents.

OOMcloud-nativeetcd
0 likes · 21 min read
Why Did Our kube-apiserver OOM? A Deep Dive into Kubernetes Control‑Plane Failures
转转QA
转转QA
Sep 28, 2022 · Backend Development

Remote Debugging Guide for Sandbox and Test Environments

This article explains how to set up remote debugging for services in sandbox or test environments, covering remote creation, locating debug ports, constructing JVM arguments, checking service status, stopping services, and useful alias commands to streamline the debugging process.

Remote Debuggingaliasbackend
0 likes · 5 min read
Remote Debugging Guide for Sandbox and Test Environments
Efficient Ops
Efficient Ops
Sep 15, 2022 · Operations

How to Diagnose and Fix Linux Network Latency Issues

This article explains how to identify the root causes of increased network latency on Linux servers, covering tools such as ping, traceroute, hping3, and wrk, demonstrating packet analysis with tcpdump and Wireshark, and showing how TCP delayed ACK and socket options affect response times.

TCPWiresharkhping3
0 likes · 17 min read
How to Diagnose and Fix Linux Network Latency Issues
Top Architect
Top Architect
Sep 3, 2022 · Cloud Native

Docker Troubleshooting Guide: Common Issues and Solutions

This article provides a comprehensive guide to diagnosing and fixing a wide range of Docker problems, including storage migration, disk space shortages, missing libraries, container corruption, network configuration, permission errors, image management, and timeout issues, with detailed command-line solutions and configuration examples.

DevOpsNetworkingcontainer
0 likes · 34 min read
Docker Troubleshooting Guide: Common Issues and Solutions