Hello Vaseem,
Below is what the catalina.out gave me. Do you have any clue. I haven't created the user from the signup page or developer invitation. this user already exists in LDAP.
May 03, 2016 9:44:50 PM com.l7tech.extension.ExtensionManagerPlugin getExtension
INFO: getExtension: authenticationHandler
05/03 21:44:50.860 DEBUG (http-37080-7:) - [ExtensionManagerPlugin general] -- Extension does not belong to known handler types. Probably a custom handler? class com.l7tech.ldap.GatewayAuthenticationPlugin
May 03, 2016 9:44:50 PM com.l7tech.ldap.RequestUtil processRequest
INFO: Response Status Code:200
May 03, 2016 9:44:50 PM com.l7tech.ldap.GatewayAuthenticationPlugin authenticate
WARNING: Login attribute (login) from GIMS doesn't match username provided by user. Found: expected: skanumur
05/03 21:44:50.979 DEBUG (http-37080-7:) - [XSLTUtil general] -- XSLTUtil.translate: XSLT in:161194 out:1553 time: 7 ms.
05/03 21:44:50.979 DEBUG (http-37080-7:) - [EditingUtils timings] -- Internal request /internal/layer7/change-password/form-writer/skanumur (HEAD - en) PRE - Threads:49 Memory max:1908932608 total:1704460288 free:560032736
>> Undefined (SiteVarUpdater) in 0 ms
>> MainContent (XMLDocument) in 1 ms
>> ReferenceContent (XMLDocument) in 0 ms
>> ReferenceContent (XMLDocument) in 0 ms
>> ReferenceContent (XMLDocument) in 0 ms
>> ReferenceContent (XMLDocument) in 0 ms
>> ReferenceContent (XMLDocument) in 0 ms
>> ReferenceContent (DocumentListing) in 26 ms
>> ReferenceContent (XMLDocument) in 0 ms
Created XML for pagerule [webadmin-change-password] in 28 ms
Thank you