How To Fix RT177 - Subtree: enqueue

RT177 - Overview

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 177

• Message text: Subtree: enqueue

What causes this issue?

This monitoring tree element (MTE) provides information on the
performance of the enqueue service in an SAP system. The enqueue
service lets applications lock data for exclusive use. Locking data
while it is being used prevents changes to the data in parallel, which
would result in inconsistencies in the data.

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?

Error message extract from SAP system. Copyright SAP SE.

RT177 - Details

• The SAP error message RT177, which states "Subtree: enqueue," typically occurs in the context of SAP's enqueue mechanism, which is used to manage locks on objects in the system. This error can arise when there is an issue with the locking mechanism, often related to the way data is being accessed or modified in the system.
  
  Cause:
  
  Lock Conflicts: The most common cause of this error is that a lock is already held on the subtree (a hierarchical structure of data) that you are trying to access. This can happen if another transaction is currently using the data.
  Long-Running Transactions: If a transaction takes too long to complete, it can hold locks longer than necessary, leading to conflicts with other transactions trying to access the same data.
  Incorrect Configuration: Sometimes, the configuration of the enqueue server or the way locks are managed in the system can lead to issues.
  System Performance Issues: High load on