Search the VMware Knowledge Base (KB)
View by Article ID

Error "Allocation request...failed with [null]" after provisioning machines in vRA (2148620)

  • 0 Ratings


  • Requests to provision machines in vRealize Automation fail intermittently.
  • You see the error message similar to:

    The following component requests failed: Virtual_Machine. Allocation request [Composition RequestId:
    [f1338b1c-5daf-4f78-ac18-7ab801ae7d75], CompTypeId: [Infrastructure.CatalogItem.Machine.Virtual.vSphere],
    BlueprintId: [1306b8f9-4638-4167-8319-995316420fdc], CompId: [Virtual_Machine], BlueprintRequestId: [26d566ed-
    a01b-49cb-828a-9116f8109692], RootCafeRequestId: [50006c42-ee7f-4d7e-a354-cf0f6f681487], SubtenantId:
    [f32a541c-1797-449e-bb34-498c3940db80]] with binding id [c11a59ca-a11a-435b-afa5-7cc8404c42a7] failed with

  • In the  Repository.log file, you see entries similar to:

    [UTC:2016-10-25 09:36:26 Local:2016-10-25 02:36] [Error]: [sub-thread-Id="10" context="D34B2dqK" token="snHafDF9"] Failed to submit request. Inner exception: Allocate reservation operation failed. No reservation available with enough memory. 8192 MB was requested..

Note: The preceding log excerpts are only examples. Date, time, and environmental variables may vary depending on your environment.


This article provides information about modifying computer resource allocation and reservations when the amount of resources requested for the build is insufficient.


The requests fail because the amount of resources requested for the build are higher than the amount of resources available to it on any available reservation



To resolve the issue:
  1. Log in to the vRealize Automation UI using Fabric Administrator privileges.
  2. Modify the compute resource allocation and reservations that are accessed by the business group in the failing request. 
  3. Ensure that there is at least one available reservation with sufficient resources to satisfy the build request.


vRealize Automation, vRA, reservation, resources

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.


  • 0 Ratings

Did this article help you?
This article resolved my issue.
This article did not resolve my issue.
This article helped but additional information was required to resolve my issue.

What can we do to improve this information? (4000 or fewer characters)

Please enter the Captcha code before clicking Submit.
  • 0 Ratings