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Julio_Navarro's avatar
Julio_Navarro
Icon for Cirrostratus rankCirrostratus
Jul 18, 2019

Using an asynchronous task | Creating UCS File

Hi, I am trying the following REST URL to create a task to generate a UCS File: Method: Post URI: mgmt/tm/task/sys/ucs/ Body: { "command": "save",    "name": "UCS01" } So, I get back: {...
asynchronous task
BIG-IP
LTM
Super-NetOps
  • Jason_Adams's avatar
    Jason_Adams
    Apr 24, 2020

     ; to close the loop on this one, it appears that you the part that was missing in your request is the -X PUT request, to set the state to 'VALIDATING'

     

    # curl -k -u admin:admin -H 'Content-Type: application/json' -X PUT -d '{"_taskState":"VALIDATING"}' https://localhost/mgmt/tm/task/sys/ucs/1563478591515657?ver=12.1.3.4
{
    "code":202,
    "message":"Task will execute asynchronously.",
    "errorStack":[]
}

    That is the request which is necessary to cause any task to begin processing. Until then, the task is waiting for any number of additional tasks to be added together.

Jason_Adams's avatar
Jason_Adams
Icon for Employee rankEmployee
Apr 24, 2020

 ; to close the loop on this one, it appears that you the part that was missing in your request is the -X PUT request, to set the state to 'VALIDATING'

 

# curl -k -u admin:admin -H 'Content-Type: application/json' -X PUT -d '{"_taskState":"VALIDATING"}' https://localhost/mgmt/tm/task/sys/ucs/1563478591515657?ver=12.1.3.4
{
    "code":202,
    "message":"Task will execute asynchronously.",
    "errorStack":[]
}

That is the request which is necessary to cause any task to begin processing. Until then, the task is waiting for any number of additional tasks to be added together.

  • Julio_Navarro's avatar
    Julio_Navarro
    Icon for Cirrostratus rankCirrostratus
    Apr 24, 2020

    And you are right! Thank you.

  • Roman_Melekh's avatar
    Roman_Melekh
    Icon for Altocumulus rankAltocumulus
    May 19, 2023

    Hello

    It looks like I need somebody's help to determine what could be wrong with my script.

    I am re-writing all the logic using PowerShell, but the idea is the same - to create a task, to start the task, to check if the task state is COMPLETED and then to download the result.

    Here is what I am facing:

    step1, to create a task:

    _taskId            : 1684506387897122
_taskState         : STARTED
_taskTimeInStateMs : 0
_taskResultLink    : https://localhost/mgmt/tm/task/sys/ucs/1684506387897122/result?ver=16.1.3.4
selfLink           : https://localhost/mgmt/tm/task/sys/ucs/1684506387897122?ver=16.1.3.4

    step2, to start the task

    code       : 202
message    : Task will execute asynchronously.
errorStack : {}

    step3, getting status (the request hags for ~30 seconds):

    Invoke-RestMethod : {"code":400,"message":"remoteSender:10.0.3.138, method:GET ","referer":"10.0.3.138","restOperationId":15296221,"kind":":resterrorresponse"}

    If I request status for the 2nd time, I can get (sometimes) task COMPLETED, or I can get a "Task not found" error. My question is why do sometimes tasks disappear?