How To Fix WQENQ001 - Lock request expired after &1 milliseconds

SAP Error Message - Details

• Message type: E = Error

• Message class: WQENQ - Messages for priority queue processing

• Message number: 001

• Message text: Lock request expired after &1 milliseconds

What causes this issue?

A lock request for lock table &V2& expired after &V1& milliseconds. The
lock argument was &V3&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check whether it is possible to increase the value of the
<DS:DE.WQENQ_MAX_WAIT_TIME>Maximum Waiting Time </> parameter, for
example, by using the
<DS:RE.RFWQENQ_ACTIVATE_QUEUE>Priority Queue for Lock Processing
</> report.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WQENQ001 - Lock request expired after &1 milliseconds ?

  Certainly! Here's a detailed explanation of the SAP error message WQENQ001: Lock request expired after &1 milliseconds:
  
  Error Message
  WQENQ001: Lock request expired after &1 milliseconds
  
  Cause
  This error occurs when an SAP enqueue (lock) request times out because the requested lock could not be obtained within the specified time limit. In SAP, enqueue locks are used to synchronize access to shared resources (such as database entries) to prevent data inconsistencies.
  Typical causes include:
  
  Long-running transactions or processes holding locks for an extended period.
  Deadlocks or lock contention where multiple processes are waiting for locks held by each other.
  High system load or performance issues causing delays in lock processing.
  Improperly terminated transactions that did not release locks.
  Enqueue server issues or communication problems between application servers and the enqueue server.
  
  
  Explanation
  When a program tries to lock an object (e.g., a database record), it sends a lock request to the enqueue server. If the lock is already held by another process,