Help Center > > User Guide> MRS Manager Operation Guide> Alarm Reference> ALM-12028 Number of Processes in the D State on the Host Exceeds the Threshold

ALM-12028 Number of Processes in the D State on the Host Exceeds the Threshold

Updated at: Dec 31, 2019 GMT+08:00


The system checks the number of processes of user omm that are in the D state on the host every 30 seconds and compares the number with the threshold. This alarm is generated when the number of processes in the D state exceeds the threshold and is cleared when the number is less than or equal to the threshold.


Alarm ID

Alarm Severity

Automatically Cleared








Specifies the service for which the alarm is generated.


Specifies the role for which the alarm is generated.


Specifies the host for which the alarm is generated.

Trigger Condition

Generates an alarm when the actual indicator value exceeds the specified threshold.

Impact on the System

Excessive system resources are used and service processes respond slowly.

Possible Causes

The host responds slowly to I/O (disk I/O and network I/O) requests and a process is in the D state.


  1. Check the process that is in the D state.

    1. In the alarm list on MRS Manager, locate the row that contains the alarm, and view the IP address of the alarm host in the alarm details.
    2. Log in to the alarm node.
    3. Run the following command to switch the user:

      sudo su - root

      su - omm

    4. Run the following command to view the PID of the process of user omm that is in the D state:

      ps -elf | grep -v "\[thread_checkio\]" | awk 'NR!=1 {print $2, $3, $4}' | grep omm | awk -F' ' '{print $1, $3}' | grep D | awk '{print $2}'

    5. Check whether no command output is displayed.
      • If yes, the service process is running properly. Go to 1.g.
      • If no, go to 1.f.
    6. Switch to user root and run the reboot command to restart the alarm host.

      Restarting the host is risky. Ensure that the service process runs properly after the restart.

    7. Wait 5 minutes and check whether the alarm is cleared.
      • If yes, no further action is required.
      • If no, go to 2.

  2. Collect fault information.

    1. On MRS Manager, choose System > Export Log.
    2. Contact the O&M personnel and send the collected log information.

Related Information


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