Troubleshooting

Below are the articles regarding AEM project Debugging, Troubleshooting and fixing AEM Performance related issues, will update the blog with new posts.

Debugging:

How to start AEM in Debug mode

Debugging in AEM

AEM Application Debugging with Visual Studio IDE

Debugging Dispatcher Authorization IssuesDebugging and Vault Configuration in IntelliJ Idea and Eclipse in AEM

Day CQ WCM Debug Filter Configuration Missing

How to Debug a Particular Java Class in CQ

Debugging in AEM

Debugging JavaScript on Android using Chrome

Debugging in IntelliJ IDEA: Part 1
Debug a CQ5/AEM6 app using eclipse
A command to Run AEM/CQ 5.6.1 Instance In Debug Mode

Error Handling:

How to manage certificates in AEM Truststore
How to Implement 301 and 302 Redirect in AEM
Handing 301 Redirection in AEM using Redirect Map Manager
Error handling using a Dispatcher

Implementing 301 and 302 Redirect in AEM
Approach to 301 redirect the internal URL's to dynamic SEO friendly URL
Different approaches to perform Vanity/Redirect URL management in AEM
External redirect for an AEM page

RedirectTarget property is not working in AEM 6.2

502 Bad Gateway while accessing /libs/cq/security/userinfo.json via telnet

Different approaches to define vanity URL in AEM

Configuring same short URL/Vanity URL for different sites with https
How to Customize/Configure the 404 error handler for multi-sites in AEM

How to Enable Cross-Origin Resource Sharing (CORS) support in AEM

How to display custom error (404,403 and 500) pages in Multi-Site AEM?

HTTPS URL is resulting with 404 - Adobe Experience Manager

AEM Logs:

Overview of CQ Logs
Explore Request Logs in AEM/Adobe CQ5
Overview of AEM Logs in detail - Part 1Overview of AEM Logs in detail - Part 2

When trying to fake a post request, you get the following error in the logs

Overview of Workflow, Performance monitoring, Logs in AEM/Adobe CQ5

How to Enable Audit Logging for CQ DAM

How to Configure the Garbage Collection Log to Roll Over

How to Rotate Logs in CQ/AEM

How to read Logs from Browser in CQ

View JSP Logging statements in CQ5/AEM

Accessing Logs Through Browser In AEM 6.2

Send Mail via Log4j with SMTP Appender

Multiple log files using Log4j appender

Audit Log Search

Logging Activates, Deactivates and Deletes

To enable logging for JSP pages

log4j.xml for crx (logging QueryImpl)

AEM Interpreting the request.log

AEM Types of Audit log

AEM log Level 0 to level 3 meaning

AEM Log files Basics

How to download the AEM server log files through Felix console

How to tail log files of AEM in windows OS using Jtail.jar file

Request Log Analyzer to find the top 10 expensive queries in AEM 6.4

Log File rotation in AEM/CQ5

Debug/Info Logging for a Particular Java Class in Adobe CQ 5

Consuming AEM Logs into New Relic with FluentD
Audit Log Maintenance in AEM 6

SegmentNotFoundException observed in the AEM log file

The SegmentNotFound Exceptions in the AEM 6.3 Log

Types of Logs in an AEM

How to change the log file name and location in AEM

Explore Request Log in AEM

Changing the log level for a package – AEM

Trouble Shooting:

Overview of Troubleshooting in AEM 6.2

What are the major Vulnerabilities and Security Issues in AEM
How to unlock a page in AEM?

Enable CORS in AEM
AEM / Adobe CQ5: Set up CQ Cluster and Troubleshoot
AEM / Adobe CQ5: Overview on Clustering

href=tel issue for international numbers in AEM RTE

Error handling using a Dispatcher

How to Debug AEM Page Load Performance Issues

How to Solve CQ Port Conflicts on Windows

Client Libraries are not Refreshing Automatically in AEM/CQ5

Nothing Showing in CRXDE Lite in AEM/CQ5

How to Reduce CQ Disk I/O

How to increase the Limit of the Largest Uploadable File

How to Assess Disk Performance Using mongoperf

Performance Troubleshooting Case Study – CPU Getting Maxed Out

Performance Troubleshooting Case Study – Slow Batch Job In AEM

Developer Health Checks
Health Checks in AEM

Error Page Handler

Troubleshooting Slow Queries in AEM

org.osgi.framework.BundleException:osgi.wiring.package=com.adobe.cq.sightly

org.osgi.framework.BundleException: osgi.wiring.package=com.adobe.cq.mcm.salesforce

java.lang.NoClassDefFoundError: com/day/cq/commons/Externalizer

Failed to execute goal org.apache.felix:maven-scr-plugin

Resolving the issues while migrating the packages between AEM instances

io.jsonwebtoken,version=[0.7,1) -- Cannot be resolved

org.apache.sling.security.impl.ReferrerFilter Rejected empty referrer header for POST request in AEM

java.lang.RuntimeException: ConfigurationManagerImpl disabled

java.lang.NullPointerException:null at com.adobe.granite.workflow.core.WorkflowSessionFactory.isSuperUser

org.apache.sling.api.resource.PersistenceException: Resource is not modifiable

Unresolveable build extension: Error resolving version for plugin 'com.day.jcr.vault:maven-vault-plugin' / Unknown packaging: content-package while deploying through Maven

com.google.gson,version=[2.2,3) -- Cannot be resolved in bundle

org.osgi.framework.ServiceException: Service cannot be cast: javax.servlet.Servlet

NPE:currentDesign.getDoctype(currentStyle).toRequest(request)

org.apache.sling.engine.impl.SlingRequestProcessorImpl service: Uncaught Throwable java.lang.LinkageError: loader constraint violation – AEM

Exception in thread "main" java.lang.NoSuchMethodError: org.slf4j.helpers.MessageFormatter.format(Ljava/lang/String;Ljava/lang/Object;)Lorg/slf4j/helpers/FormattingTuple;Jcr2davRepositoryFactory

Caused by: java.lang.NoClassDefFoundError: javax/management/InstanceAlreadyExistsException while connecting to Oracle Database from OSGI

Enable CORS in AEM
AEM Troubleshooting

Non-English Characters not displaying on a page

/etc/cloudsettings/default/contexthub.kernel.js is not loading in AEM 6.4
How to Clear/Recompile the JSP classes in AEM 6.1
Time zone difference in Author/Publishers
How to disable Geolocation feature

Removing the Cookie is not working in IE10 and IE11

window.location.href is not working while clicking on a hyperlink in IE

checkout: com.day.jcr.vault.vlt.VltException: Unable to mount filesystem in AEM

Browser cookie values are not set in IE10 and IE11

Changing a .content.xml file locally is not reflecting in CRX after maven build

The bundle is not uploading after maven build

Uncaught TypeError: Cannot read property 'extend' of undefined' - cq.extend

java.lang.UnsupportedOperationException: Deserialization not allowed for class [Ljava.lang.Object;

com.day.cq.mailer.MailingException: org.apache.commons.mail.EmailException: Sending the email to the following server failed - AEM

com.adobe.cq.sightly,version=[2.5,3) -- Cannot be resolved

Plugin org.apache.maven.plugins:maven-dependency-plugin:2.10 or one of its dependencies could not be resolved

How to disable the minification for client libraries in AEM

An issue with turning off location tracker feature (Remove the geolocation store)

AEM Component is in a satisfied state, not in active

AEM Components not loading in Touch UI

AEM Touch UI issues

Uncaught Reference Error: CQ is not defined

Custom bundles are in the installed state after AEM server restart

javax.inject, version=[0.0,1) -- Cannot be resolved

Sidekick is not loading in AEM

Decompile AEM: How to get a jar from AEM
Encrypting/Decrypting data in AEM
Exception while browsing the tags in page creation wizard: The method transform(Object) of type new Transformer(){} must override a superclass method – AEM

Performance Issues:

Improve the performance of the AEM websites

Performance monitoring in AEM projects
Quality, Security, Performance Checks in Adobe Cloud Manager brief overview

Overview of Workflow, Performance monitoring, Logs in AEM/Adobe CQ5
Performance issues on AEM web sites
Performance tuning
Performance tuning tips for Adobe CQ 5.X and AEM 6.X

Workflow Purging for AEM Performance optimization
TAR Compaction for AEM Performance optimization

Performance issue in CRXDE IDE of AEM/Adobe CQ5
Performance issue in CRXDE IDE of AEM/Adobe CQ5

Miscellaneous Administration
Create and analyze Heap Dump in AEM

Run online and offline Tar Compaction in AEM/Adobe CQ5

Monthly Offline Maintenance of the AEM Repository

Improve Page Load Performance in Firefox

Performance Tuning AEM 6 Deployments on MongoDB

How to Improve Query Performance in Oak

Recommended Sequence of CQ Maintenance Operations

AEM 6.1 Base Size

How to Set the Landing Page

How to Create a CQ “Author” Instance Without Geometrixx Content

How to Determine How Long CQ Has Been Running

How to Efficiently Copy Large Amounts of Content Between CQ Repositories

Performance Engineering 

Performance Troubleshooting Case Study – CPU Getting Maxed Out

Performance Troubleshooting Case Study – Slow Batch Job In AEM

Disaster Recovery Planning – Key Terms

Disaster Recovery Strategies

Horizontally Scaling Systems (Scale-Out)

Disk space growing on the CQ author server?

How to check disk usage in CRX

How to Assess Disk Performance Using mongoperf

How to Debug AEM Page Load Performance Issues

AEM (Adobe CQ) Performance on different Hardware

Performance list

w3c validation

XSS Protection Service

How to Bookmark AEM URLs on Browser?

HTML page construction standards for performance

Improving performance with browser caching

How to take Online Backups?

Fixing a hanging author server

Author server says "Loading" for a long, long, long time

Midnight at the lost and found

Lots of data*.tar files in the author

AEM JVM VM Behavioral Options

AEM JVM GC options

Performance tuning

AEM JVM VM Performance Options

AEM JVM VM options for Debugging

AEM 6.3 Maintenance activities or Performance tuning

How to generate Heap dump or run Garbage collection through Felix console

AEM6.3 Performance Tuning tips

AEM performance Analysis from top to Bottom for each layer of the system

Performance Tree -Identification of Issues in Different layers of the AEM system

AEM Common critical issues and their fixes

AEM Performance analysis using built-in profiler

AEM Basics of Performance Common issues and how to prevent them

AEM How to find requests with long duration times

Apache benchmarking tool to identify the HTTP server performance along with AEM server Load Testing

AEM Tools for Monitoring and Analyzing Performance

Performance Tuning in AEM

Performance & Load Testing AEM

Real full-stack performance monitoring through Dynatrace Tool

Performance tuning for production-ready instance

Performance Tuning in Informatica

Performance Optimization tools for AEM

Performance Dashboard AEM

Improve Web Page Performance

How to Use JMeter for Performance & Load Testing-Chapter 5

Building Health Checks for AEM

How to monitor the Performance of AEM instance using JVisualVM

AEM Sites Performance Issues

AEM Assets Performance Issues & How to Fix

AEM Memory Issues and How to Fix

AEM Tune your JVM For Better Performance

What are the different ways to run the garbage collector in AEM through Felix Console

How to refresh all open Session in AEM

How to perform Re-indexing for the propertyindexAync in AEM

Revision GC through JMX console in AEM

How to run the Full Garbage collection in AEM

Data Store Garbage Collection AEM 6.x

How to take online repository backup and perform the Datastore GC and revision GC for AEM 6.3

Full Garbage collection for BLOB Garbage

What is the repository Backup Sequence in AEM

How to Troubleshooting –Rapid DataStore growth in AEM 6.3

Why GC takes a too long time to finish in AEM6.3

How to Troubleshoot Missing Blobs in AEM

How to reset the Repository ID in AEM

How to run online and offline Consistency Check in AEM through JMX console

Managing AEM Datastore adobe official document

AEM OutOfMemoryError: Java heap space or OutOfMemoryError: GC overhead limit exceeded.

Heap Dump Generation in AEM through JMX console

Java VM Diagnostic commands to run GC, Finalization, vmSystemProperties, vmVersion, vmUptime, and vmCommand line

How to clear blocked queue or forced-to retry blocked queue in AEM through JMX console

When to perform Re-Indexing in AEM

In AEM why backup_.tar files are created

AEM How to identify the check session count

AEM Command to check CPU usage & how to interpret the results

AEM CPU at 100% -Analyze slow and blocked processes

AEM How to take a Thread Dump

AEM Analysis of Unclosed sessions

AEM Indexing Issues & How to Fix

AEM6.3 How to clear or extend the reporting Cache
AEM6.3 How to clear the Facet Cache
AEM Common How to identify Slow running Queries.
Revision Cleanup
AEM Offline Compaction
How to set the Oak login token session expiration
How to enable Debug mode in AEM & find unclosed Sessions

How to find the no of open sessions, segment repo size, and Histograms

Set the Oak Login token session expiration

Change AEM Default Session timeout value

AEM Common Security checklist for Production Server

AEM What is the average number of page activations per day

AEM What causes CPU at 0% consumption

AEM Typical situations causing high CPU consumption

AEM DISK I/O Running out of Disk Space issues

How to restart or stop the AEM Framework only

How to find the server uptime or last started

How to find out the number of processors

How many req per hour do you have on the author or publish system

AEM How to find how many authors are working with the system

AEM6.3 How to increase the limit for the Uploadable file

How to protect your AEM instances from Google searches

Adobe Experience Manager Crashes during large asset uploads

How to find the Binaries location on the file system

Steps to Tune the Sling Job Queues

Disk usage is in AEM is abnormally and rapidly increasing on an AEM server.

How to find the number of Processor on which AEM server is running

AEM Version Purging Basics

AEM How to Purge Versions of a Web Site

AEM Interpretation of Version purging results

AEM IBM Thread Analyzer guide

Top 5 server-side programming languages for websites
Performance Tuning in AEM
Debugging Slowness in your AEM instance: Part 1
Debugging Slowness in your AEM instance: Part 2
Developing a caching service to cache third part elements to improve performance in AEM