# Exception Nodes

# Node: Catch

Catch node is used for capturing the exceptions from the flow. Project may contains as many catch nodes as required.

It is good practice that each project has at least one Catch node with 'all nodes' interceptor.

# Properties

  • Catch errors from - allows selection of all nodes or specific nodes whose exceptions to be intercepted by this node.

    • All nodes: If the catch node is configured with all nodes option selected then all the exception that is triggered at any point in the flow is captured.

    • Selected nodes: If the catch node is s configured with Selected nodesoption selected then only those exceptions triggered from the selected node in the flow is captured.

Error details are stored in msg.error.

Only one Catch node is called when exception occurs. If Catch node is defined for node that triggered exception then this Catch node is executed. In last resort the Catch with all nodes will be called if none of the other Catch nodes have selected faulty node.

Flow can contain only one Catch node with 'all nodes' selected.

If multiple Catch nodes are defined for specific node, only one of them will be triggered, determined by runtime.

Use EventListener End node to return specific error code (status) and error message.

TIP

Always provide proper 'Display Name' for each node in the project. This allows easier selection of nodes to capture exceptions from.

# Example:

How to catch an exception and execute error logic

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