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Support Article

RequestorLockException after SOAP Call and Connect-Wait



A process is configured with a Connect-SOAP Call set to RunInParallel and Connect-Wait is configured with a value of -1. The process executes successfully on one node, but fails on the second node with RequestorLockException. Howevdr, the SOAP Call completes successfully when run synchronously.
The node which failed, is configured with Background Processing, Search, and Stream as the node type. The working node is configured with Web User as the node type.

Error Messages Unable to synchronize on requestor HRVSBMOVXUUR18N7OAYC81V7ZJ0XKLBQVA within 120 seconds: (thisThread = WebContainer : 4) (originally locked by = WebContainer : 9) (finally locked by = WebContainer : 9)

Steps to Reproduce

Run the process that invokes the SOAP Call and Connect-Wait.

Root Cause

A defect or configuration issue in the operating environment.
The background requestors or threads available were insufficient to execute the SOAP Request asynchronously.


Perform the following local-change:

Use the below prconfig value or Dynamic System Setting (DSS) to increase the 'agent/threadpoolsize' and 'services/maxrequestorchildren' settings.

prconfig DSS
<env name="agent/threadpoolsize"  value="100" /> prconfig/agent/threadpoolsize/default

Rule – Pega-Engine
Value 100
<env name="services/maxrequestorchildren" value="100" /> prconfig/services/maxrequestorchildren/default

Rule – Pega-Engine
Value 100

Published July 16, 2020 - Updated December 2, 2021

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