When to perform Re-Indexing in AEM

Statement : Only cases for Re-indexing

Solution : 

• New or changed index definition
• Bug: Counter index out of sync 
• Bug: Lucene binary is missing or corrupt 
• Bug: Very large transaction + many child nodes 
• Bug: Partial migration using sidegrade


Reference : http://jackrabbit.apache.org/oak/docs/query/indexing.html#reindexing

How to Troubleshoot AEM Replication - Adobe official document

Solution : Follow the below Official document of Adobe.

https://helpx.adobe.com/content/dam/help/en/experience-manager/kt/eseminars/gems/aem-troubleshooting-aem-replication/_jcr_content/main-pars/download_section/download-1/AEM%20Gems%20-%20Troubleshooting%20AEM%20Replication.pdf

How to perform workflow maintenance in Ain AEM

Statement: Workflow maintenance through JMX

Solution :

• Go to this path http://localhost:4502/system/console/jmx/com.adobe.granite.workflow%3Atype%3DMaintenance
• Click on PurgeCompleted() method and key in how many old days workflow to be purged(30)

• How to purge active workflows

• List of maintenance task to be performed on workflows:

Operations
Return Type	Name
int	countStaleWorkflows(java.lang.String model [optional]) returns the count of stale workflows in the system
javax.management.openmbean.TabularData	terminateFailedInstances(boolean restart the instance, boolean dry run, java.lang.String model [optional]) Terminate Failed Instances, with optional restart of instance
javax.management.openmbean.TabularData	retryFailedWorkItems(boolean dry run, java.lang.String model [optional]) Retry Failed WorkItems
javax.management.openmbean.TabularData	listCompletedWorkflowsPerModel() count the number of completed workflows
javax.management.openmbean.TabularData	returnSystemJobInfo() retrieve overall workflow and system job queue information
javax.management.openmbean.TabularData	restartStaleWorkflows(java.lang.String model [optional], java.lang.Boolean dry run) restarts stale workflows in the system
javax.management.openmbean.TabularData	returnWorkflowQueueInfo() retrieve workflow queue information
javax.management.openmbean.TabularData	returnWorkflowJobTopicInfo() retrieve workflow job topic information
javax.management.openmbean.TabularData	listRunningWorkflowsPerModel() count the number of running workflows
int	countCompletedWorkflows(java.lang.String model [optional]) count the number of completed workflows
int	returnFailedWorkflowCount(java.lang.String model [optional]) count number of failed workflows
int	countRunningWorkflows(java.lang.String model [optional]) count the number of running workflows
javax.management.openmbean.TabularData	purgeCompleted(java.lang.String model [optional], java.lang.Integer number of days since workflow has been completed, java.lang.Boolean dry run) Purge Completed Workflows
javax.management.openmbean.TabularData	purgeActive(java.lang.String model [optional], java.lang.Integer number of days since workflow started, java.lang.Boolean dry run) Purge Active Workflows
javax.management.openmbean.TabularData	fetchModelList() get workflow model list
javax.management.openmbean.TabularData	returnFailedWorkflowCountPerModel() count number of failed workflows per model