KB-1340 How to automate the restart of stuck nodes within a process model

James Lee — Wed, 19 Aug 2020 17:50:31 GMT

Current Revision posted to Appian Knowledge Base by James Lee on 8/19/2020 5:50:31 PM

Purpose

DISCLAIMER: The application as well as the AppMarket plug-ins provided in this article are provided as-is with no express guarantee of functionality by Appian Technical Support.

Restarting process nodes when they fail is generally a manual process, with multiple process instances having failed process nodes that need to be restarted individually. There is no out-of-the-box way to restart multiple failed process nodes at once, but it can be achieved using a custom solution.

This article provides a high level example of how a custom solution could be developed using the following plug-ins available on the AppMarket:

Instructions

Create a new process model.
Add the "Process By Node Status" smart service.
Open the smart service and enter the UUID of the process model that contains instances needing to be analyzed (this smart service can be looped over to support multiple process models).
Set the "status to search for" to 8 (Paused by Exception). This will search through the process model(s) from step 3) and return the process ids and node UUIDs for any nodes Paused by Exception.
Add the "Restart All Nodes" smart service
Pass in the node UUIDs and the process IDs obtained in step 4).

An application that demonstrates this is attached here: Restarting Failed Nodes Example.zip

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: August 2020

Tags: process models, how-to, application design

KB-1340 How to automate the restart of stuck nodes within a process model

Nick Vigilante — Mon, 01 May 2017 15:12:39 GMT

Revision 7 posted to Appian Knowledge Base by Nick Vigilante on 5/1/2017 3:12:39 PM

DISCLAIMER: The application provided in this article as well as the shared components are provided as-is with no express guarantee of functionality by Appian Technical Support.

In order to make the restart of failed nodes more automatic you can combine two shared components on Appian Forum:

Here's how you can combine them:

1. The Get Processes By Node Status smart service takes the UUID of the process model whose instances you wish to analyze (you can run this through a loop to support multiple models). With this smart service, you can search for nodes in status 8 (Paused by Exception) within instances of model with UUID X.

This node will return the process ids and the node uuids.

2. You can now use the Restart All Nodes smart service part of the Process Management Services shared component to restart those nodes simply passing the node UUIDs and the process IDs obtained in step #1.

An application that demonstrates this is attached here: Restarting Failed Nodes Example.zip

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: May 2017

Tags: administration, process models, application design

KB-1340 How to automate the restart of stuck nodes within a process model

Nick Vigilante — Mon, 01 May 2017 11:12:39 GMT

Revision 6 posted to Appian Knowledge Base by Nick Vigilante on 5/1/2017 11:12:39 AM

DISCLAIMER: The application provided in this article as well as the shared components are provided as-is with no express guarantee of functionality by Appian Technical Support.

In order to make the restart of failed nodes more automatic you can combine two shared components on Appian Forum:

Here's how you can combine them:

This node will return the process ids and the node uuids.

An application that demonstrates this is attached here: community.appian.com/.../Restarting-Failed-Nodes-Example.zip

Affected Versions

This article applies to all versions of Appian.

Last Reviewed: May 2017

Tags: administration, process models, application design

DRAFT: How to automate the restart of stuck nodes within a process model

Nick Vigilante — Fri, 17 Mar 2017 10:45:55 GMT

Revision 5 posted to Appian Knowledge Base by Nick Vigilante on 3/17/2017 10:45:55 AM

DISCLAIMER: The application provided in this article as well as the shared components are provided as-is with no express guarantee of functionality by Appian Technical Support.

In order to make the restart of failed nodes more automatic you can combine two shared components on Appian Forum:

Here's how you can combine them:

This node will return the process ids and the node uuids.

An application that demonstrates this is attached here: community.appian.com/.../Restarting-Failed-Nodes-Example.zip

Tags: administration, process models, application design

DRAFT: How to automate the restart of stuck nodes within a process model

Nick Vigilante — Fri, 17 Mar 2017 10:30:35 GMT

Revision 4 posted to Appian Knowledge Base by Nick Vigilante on 3/17/2017 10:30:35 AM

DISCLAIMER: The application provided in this article as well as the shared components are provided as-is with no express guarantee of functionality by Appian Technical Support.

In order to make the restart of failed nodes more automatic you can combine two shared components on Appian Forum:

Here's how you can combine them:

This node will return the process ids and the node uuids.

Below is a video demonstrating how the two shared components would be used in a process model:

Tags: administration, process models, application design

DRAFT: How to automate the restart of stuck nodes within a process model

Nick Vigilante — Fri, 17 Mar 2017 10:29:47 GMT

Revision 3 posted to Appian Knowledge Base by Nick Vigilante on 3/17/2017 10:29:47 AM

DISCLAIMER: The application provided in this article as well as the shared components are provided as-is with no express guarantee of functionality by Appian Technical Support.

In order to make the restart of failed nodes more automatic you can combine two shared components on Appian Forum:

Here's how you can combine them:

This node will return the process ids and the node uuids.

Below is a video demonstrating how the two shared components would be used in a process model:

Tags: administration

DRAFT: How to automate the restart of stuck nodes within a process model

Nick Vigilante — Wed, 08 Mar 2017 17:17:48 GMT

Revision 2 posted to Appian Knowledge Base by Nick Vigilante on 3/8/2017 5:17:48 PM

DISCLAIMER: The application provided in this article as well as the shared components are provided as-is with no express guarantee of functionality by Appian Technical Support.

Tags: administration

KB-1305 DRAFT

Nick Vigilante — Tue, 07 Mar 2017 17:13:59 GMT

Revision 1 posted to Appian Knowledge Base by Nick Vigilante on 3/7/2017 5:13:59 PM

DRAFT

Tags: administration