IDM Task fails with 'The system is unavailable right now'

Document ID : KB000106142
Last Modified Date : 12/07/2018
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Issue:
We are seeing an error when accessing a certain task to create users. When I access the task, I get an error message saying "Error: The system is unavailable right now. Please try again later".
Cause:
The error is coming from a Logical Attribute Handler which is trying to connect to an invalid CAPTCHA url. The IM application server log shows additional errors such as: 

[7/10/18 13:37:32:508 EDT] 000003d8 HTTPSender I org.apache.axis2.transport.http.HTTPSender sendViaPost Unable to sendViaPost to url[https://xxx.xxx.xxx/CAPTCHA] 
org.apache.axis2.AxisFault: Transport error: 404 Error: Not Found 
at org.apache.axis2.transport.http.HTTPSender.handleResponse(HTTPSender.java:295) 
at org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:190) 
at org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:75) 
at org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:389) 
at org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:222) 
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:435) 
at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:402) 
at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:229) 
at org.apache.axis2.client.OperationClient.execute(OperationClient.java:165) 
at CAPTCHAservice.ServiceStub.GetQuestion(ServiceStub.java:726) 
at com.Netegrity.samples.LAHGenerateCAPTCHAQuestion.initialize(LAHGenerateCAPTCHAQuestion.java:27) 
... 
[7/10/18 13:37:32:508 EDT] 000003d8 SystemOut O Transport error: 404 Error: Not Found 
[7/10/18 13:37:32:508 EDT] 000003d8 SystemOut O I am at 8 
[7/10/18 13:37:32:508 EDT] 000003d8 SystemOut O 13:37:32,508 DEBUG [ims.ui] The system is unavailable right now. Please try again later. 
Resolution:
Update the Logical Attribute Handler code to use a valid CAPTCHA url