How To Fix WA856 - Event queue could not be deleted

SAP Error Message - Details

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 856

• Message text: Event queue could not be deleted

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WA856 - Event queue could not be deleted ?

  SAP Error Message:
  
  WA856 - Event queue could not be deleted
  
  Cause:
  The error message WA856 typically occurs when the SAP system tries to delete an event from the event queue but fails. This can happen due to several reasons:
  
  
  Locking Issues:
  
  The event queue entry is locked by another process or user, preventing deletion.
  
  
  Database Inconsistency:
  
  The event queue table (usually EDIDS or related tables) might have inconsistencies or corrupted entries.
  
  
  Authorization Problems:
  
  The user or process attempting to delete the event queue entry does not have sufficient authorization.
  
  
  Technical Issues:
  
  Problems with the enqueue/dequeue mechanism or background job failures that handle event queue processing.
  
  
  
  Solution:
  
  
  Check Locks:
  
  Use transaction SM12 to check if there are any locks on the event queue entries.
  If locks exist and are stale, consider releasing them carefully.
  
  
  
  Analyze Event Queue Table:
  
  Check the event queue tables (EDIDS, EDIDS2, EDIDS3) for inconsistencies.
  Run database consistency checks or use standard SAP tools to repair inconsistencies.
  
  
  
  Authorization Check:
  
  Verify that the user or background job has the necessary authorizations to delete event queue entries.
  Adjust roles/authorizations if necessary.
  
  
  
  Restart Event Processing:
  
  Sometimes, restarting the event processing jobs (e.g., jobs related to ALE/IDoc processing) can clear stuck entries.
  Use transaction SM37 to monitor and restart relevant background jobs.
  
  
  
  Manual Deletion (with Caution):
  
  If the event queue entries are corrupted and cannot be deleted by normal means, a manual deletion from the database might be necessary.
  This should only be done under SAP support guidance or by experienced BASIS administrators to avoid data loss.
  
  
  
  SAP Notes and Support:
  
  Search for SAP Notes related to WA856 for specific patches or corrections.
  If the problem persists, consider raising a support ticket with SAP.
  
  
  
  
  Related Information:
  
  
  Event Queue in SAP:
  
  The event queue is used in ALE (Application Link Enabling) and IDoc processing to manage asynchronous communication between systems.
  
  
  Tables Involved:  
  
  EDIDS - Status records for IDocs/events  
  EDIDS2, EDIDS3 - Additional status information
  
  
  
  Transactions to Check:
  
  SM12 - Lock entries  
  SM37 - Background jobs  
  WE02 / WE05 - IDoc monitoring  
  BD87 - Reprocessing of IDocs/events
  
  
  
  Common Scenarios:
  
  Event queue entries stuck due to network or system failures.
  Background jobs not running or failing.
  Authorization or system inconsistencies.
  
  
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Lock conflicts, database inconsistencies, authorization issues, or technical failures.
  
  
  Solution
  Check and release locks, verify authorizations, restart event processing jobs, repair DB inconsistencies, consult SAP Notes.
  
  
  Related
  ALE/IDoc processing, event queue tables (EDIDS), transactions SM12, SM37, WE02, BD87.
  
  
  
  
  If you provide more context (e.g., when the error occurs, system logs), I can help with more targeted advice.