Question

1
Replies
30
Views
Close popover
Vishal Srivastava (VishalS4)
Virtusa

Virtusa
IN
VishalS4 Member since 2013 8 posts
Virtusa
Posted: March 3, 2021
Last activity: March 3, 2021

java.lang.LinkageError: loader constraint violation Exception post upgrade to Pega 8.5.1

Hi, After upgrading from Pega 7.3.1 to Pega 8.5.1 we are seeing the below exception while executing an operation involving an external jar file. We have imported all external jars using Pega import . We tried removing/disabling httpclient and any other external jar if present else where in the server to avoid the conflicts but the issue remain. Any help appreciated!!

 java.lang.LinkageError: loader constraint violation: loader (instance of com/pega/pegarules/bootstrap/loader/PRAppLoader) previously initiated loading for a different type with name "org/apache/commons/httpclient/HttpClient"

            at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_252]

            at java.lang.ClassLoader.defineClass(ClassLoader.java:756) ~[?:1.8.0_252]

            at com.pega.pegarules.bootstrap.loader.PRAppLoader.findClassInternal(PRAppLoader.java:830) ~[prbasejava6.jar:?]

            at com.pega.pegarules.bootstrap.loader.PRAppLoader.findClass(PRAppLoader.java:373) ~[prbasejava6.jar:?]

            at com.pega.pegarules.bootstrap.loader.PRAppLoader.loadClassInternal(PRAppLoader.java:700) ~[prbasejava6.jar:?]

            at com.pega.pegarules.bootstrap.loader.PRAppLoader.loadClass(PRAppLoader.java:625) ~[prbasejava6.jar:?]

            at com.pega.pegarules.bootstrap.loader.PRAppLoader.loadClass(PRAppLoader.java:550) ~[prbasejava6.jar:?]

            at com.scb.util.CSHTTPClientPool.<init>(CSHTTPClientPool.java:15) ~[CSClient-8.0.jar:?]

            at com.scb.util.Communicator.<init>(Communicator.java:70) ~[CSClient-8.0.jar:?]

            at com.scb.cs.client.CS.getCommunicator(CS.java:282) ~[CSClient-8.0.jar:?]

            at com.scb.cs.client.CS.requestTokenJSON(CS.java:355) ~[CSClient-8.0.jar:?]

            at com.scb.cs.client.CS.requestToken(CS.java:311) ~[CSClient-8.0.jar:?]

***Edited by Moderator: Pooja Gadige to add platform capability tag***
Pega Platform 8.5.1 Case Management System Administration Upgrades Lead System Architect Upgrade