Search Engine: Elastic

Article ID: 132286, created on Feb 22, 2018, last review on Feb 22, 2018

  • Applies to:
  • Operations Automation 7.3


Odin Automation has been upgraded to 7.3.

The environment includes Web Hosting Plesk and Virtualization (Virtuozzo Containers) modules.

Task Manager is filled with tasks

Execute operation 'applyNodeChanged' with ID bfbc4427-aa63-4e62-9567-5d8caaf2b5d7 on resource c2899a83-4778-4c3b-a322-24a8f74eeb29. Additional info: Starting attaching of the (10101) Service Node.

Tasks are stuck in Running state for 45 minutes and get rescheduled or failed afterwards with errors like:

The remote server is down, details:
system exception, ID ''
Unknown vendor minor code id (0), minor code = 0, completed = NO


Internal error: SDK::Platform::blob Plesk::SaaS::SaaSManagerTasks_impl::taskCustomOperationAsyncExec(const SDK::Platform::Properties&) : [APSC] Timeout.


An upgrade action that propagates all OA hosts to APS bus triggers a flood of tasks, resulting in logical deadlocks. The behavior is improved in scope of WHM-10423.


A fix for the issue is to raise the amount of Apache workers on the Web Hosting Plesk Management Node:

  • Edit /etc/httpd/conf.d/mpm_prefork.conf
  • Increase the following parameters to 50:

    ServerLimit       10
    MaxClients        10

    Note: the workaround requires that the Web Hosting Plesk node is configured with the recommended amount of RAM (32 GB or more).

Once the parameters are increased, restart the Apache service:

# systemctl restart httpd

It is highly recommended to roll back the changes after all applyNodeChanged tasks are successfully completed.

The permanent fix will be included into one of the future versions of Odin Automation.

5356b422f65bdad1c3e9edca5d74a1ae caea8340e2d186a540518d08602aa065 e12cea1d47a3125d335d68e6d4e15e07 dd79f16c76b9dca75205ab5e9f5465ea 1941880841f714e458ae4dc3d9f3062d

Email subscription for changes to this article
Save as PDF