How To Fix SDBALM154 - Locked data collectors

SDBALM154 - Overview

• Message type: E = Error

• Message class: SDBALM - SAP DB and liveCache Alert Monitoring

• Message number: 154

• Message text: Locked data collectors

What causes this issue?

The monitoring architecture locks a data collector if it detects serious
problems. The collector can then no longer be started, not even manually
in transaction RZ20.
Examples of serious problems that can cause a collector to be locked
are:
A data collector triggered a short dump.
The monitoring architecture detects that a data collector has been
running too long.
This node tells you whether one or more of the four data collectors
("Collector A", "Collector B", "Collector C", or "Collector D") have
been locked by the monitoring architecture.
Alerts
<ZH>Green:</>
None of the four data collectors have been locked.
<ZH>Red:</>
At least one of the four data collectors has been locked and can no
longer be started. The status message tells you which collector has been
locked.

How to fix this error?

Unlock the affected data collector or collectors:
In transaction RZ20, navigate to the data collectors for the affected
instance:
(RZ20 -> SAP CCMS Technical Experts Monitors -> All Monitoring Contexts
,,-> <(><<)>name of database collection> -> Collectors and Internals ->
Collectors -> Collector A/B/C/D)
Unlock the data collector:
Select the data collector.
Choose the "Details" pushbutton.
Select the top line (for the data collector).
In the menu, choose Edit -> Method Status -> Reset -> Data Collection
Method.
Then activate the data collector manually:
In the menu, choose Extras -> Activate Maintenance Function.
Select the data collector.
In the menu, choose Edit -> Nodes (MTE) -> Start Methods -> Start Data
Collection Method.
If the data collector turns green, the problem has been solved.
If you get a short dump when you try to start the data collector
manually, analyze and remove the cause of the error. Unlock the data
collector again and activate it manually.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDBALM154 - Locked data collectors ?

  The SAP error message SDBALM154 indicates that there are locked data collectors in the SAP system. This typically occurs in the context of the SAP Database Performance Monitor (DBACOCKPIT) or when using the SAP Solution Manager for monitoring database performance.
  
  Cause:
  The error message is triggered when data collectors that are responsible for gathering performance metrics or statistics are locked. This can happen due to several reasons, including:
  
  Long-running transactions: If a transaction that is responsible for collecting data is taking too long to complete, it can lead to a lock.
  Deadlocks: Situations where two or more processes are waiting for each other to release locks can cause data collectors to be locked.
  Configuration issues: Incorrect settings in the monitoring configuration can lead to data collectors being unable to function properly.
  System performance issues: High load on the database or system can lead to delays in data collection processes.
  
  
  Solution:
  To resolve the issue of locked data collectors,