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Support Article

ConnectionPoolTimeoutException impacts system performance

SA-69484

Summary



Multiple ConnectionPoolTimeoutException occurs and system performance degrades.


Error Messages



Caused by: com.pega.apache.commons.httpclient.ConnectionPoolTimeoutException: Timeout waiting for connection
at com.pega.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnection(MultiThreadedHttpConnectionManager.java:491) 
at com.pega.apache.commons.httpclient.MultiThreadedHttpConnectionManager.getConnectionWithTimeout(MultiThreadedHttpConnectionManager.java:395) 
at com.pega.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:153) 
at com.pega.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397) 
at com.pega.apache.axis2.transport.http.AbstractHTTPSender.executeMethod(AbstractHTTPSender.java:629) at com.pega.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:193) 
at com.pega.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:75) 
at com.pega.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:411) 
at com.pega.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:233) 
at com.pega.apache.axis2.engine.AxisEngine.send(AxisEngine.java:445) 
at com.pega.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:406) 
at com.pega.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:229) at com.pega.apache.axis2.client.OperationClient.execute(OperationClient.java:165)


Steps to Reproduce



Unknown


Root Cause



A defect or configuration issue in the operating environment.

All the timeout exceptions are related to SOAP Connectors. The following two Dynamic System Settings (DSS) are not configured in the system:
  1. Axis2_Max_HostConnections
  2. Axis2_Max_Connections
These settings apply only to the Connect-SOAP and are managed by Apache HTTP connection pool.


Resolution



Perform the following local-change:

Configure the below DSS settings.
  1. Axis2_Max_HostConnections
  2. Axis2_Max_Connections
For Pega 7.2.1, apply HFix-29961 (this resolves the issue such that system retrieves the two settings).

Tags:

Pega Platform 7.2.1 Pega Platform Platform System Administration

Published August 15, 2019 - Updated October 8, 2020

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