Start task

Procedure

Qlik Sense performs the following procedure:

A request is sent to the Qlik Sense Repository Service (QRS).
The manager Qlik Sense Scheduler Service (QSS) on the central node communicates with each worker QSS to see which ones are available to perform the task.
The task is given to the currently available worker QSS with the least load according to the load balance rules.

In case of success, log entries are written in the following files throughout the procedure:

Task not found error
Description	Command=Start task;Result=5;ResultText=Error: Failed
Message	Task not found
Action	Try the following measures: If the repository database is accessible, search the database for the task. Check if the task has been successfully synchronized to the rim nodes. Create a new, identical task and see if it works.

Scheduler is not licensed error
Description	Command=Start task;Result=10;ResultText=Error: Failed
Message	Scheduler is not licensed. Not allowed to run Tasks
Action	Provide a valid Qlik Sense license.

Scheduler is not Manager error
Description	Command=Start task;Result=15;ResultText=Error: Failed
Message	Scheduler is not Manager. Not allowed to run Tasks
Action	Make sure that the QSS on the central node is “Manager” or “Manager and Worker”.

Found active session for Task error
Description	Command=Start task;Result=20;ResultText=Error: Failed
Message	Found active session for Task. Task not started
Action	Try the following measures: Wait until the task has completed. Stop the task. Restart the QSS.

Task disabled error
Description	Command=Start task;Result=25;ResultText=Error: Failed
Message	Task disabled
Action	Enable the task.

TaskExecutionSession already exists error
Description	Command=Start task;Result=30;ResultText=Error: Failed
Message	TaskExecutionSession already exists for App <App.Name>
Action	Try the following measures: Wait until the task that is reloading the app has completed. Stop the task that is reloading the app. Restart the QSS.

No worker nodes found to execute Task error
Description	Command=Start task;Result=40;ResultText=Error: Failed
Message	No worker-nodes found to execute Task: <Task.Name>
Action	Proceed as follows: Check the status of the worker nodes to determine if they can perform a reload. Check that the app to reload exists on the worker nodes.

Unable to create TaskExecutionSession error
Description	Command=Start task;Result=45;ResultText=Error: Failed
Message	Unable to create TaskExecutionSession
Action	Restart the QSS.

Unexpected exception when starting task error
Description	Command=Start task;Result=50;ResultText=Error: Failed
Message	Unexpected exception when starting task. Exception message: <Exception.Message>
Action	Restart the QSS.

Unexpected exception when trying to start task error
Description	Command=Start task;Result=55;ResultText=Error: Failed
Message	Unexpected exception when trying to start task. Exception message: <Exception.Message>
Action	Restart the QSS.

Max number of retries reached for task error
Description	Command=Start task;Result=80;ResultText=Error: Failed
Message	Max number of retries (<Amount>) reached for task (id/name) <Task.ID>/<Task.Name>
Action	Restart the QSS.

Not possible to initiate retry error
Description	Command=Start task;Result=90;ResultText=Error: Failed
Message	Not possible to initiate retry. TaskExecutionSession is null
Action	Restart the QSS.

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