Hi Team,

CAS Server : 6.3.3 
CAS Client : 3.6.2

We are facing a peculiar issue in production. This issue is specific to 
clustered environment. While communicating from one server to other 
server,  CAS releases wrong "UID".

We have 3 servers in PROD. CASPROD1, CASPROD2, CASPROD3
*Scenario 1:*
When user logs in, CAS server releases attribute UID in CASPROD1 after 
successful authentication. While communicating to CAS client, CAS releases 
the same UID attribute if request reaches the same server instance 
CASPROD1. *This is working fine.*

*Scenario 2:*
When user logs in, CAS server releases attribute UID in CASPROD1 after 
successful authentication. While communicating to CAS client, if second 
server handle the request, CAS releases the different UID(which is already 
available in CASPROD2 server.

*LDAP properties:*
cas.authn.ldap[0].order=0
cas.authn.ldap[0].ldapUrl=https://xxxx
cas.authn.ldap[0].type=AUTHENTICATED
cas.authn.ldap[0].useSsl=true
cas.authn.ldap[0].useStartTls=false
cas.authn.ldap[0].connectTimeout=5000
cas.authn.ldap[0].baseDn=
cas.authn.ldap[0].searchFilter=email={user}
cas.authn.ldap[0].subtreeSearch=true
cas.authn.ldap[0].bindDn=xxxxxx
cas.authn.ldap[0].bindCredential=xxxx

cas.authn.ldap[0].principalAttributeId=ui
cas.authn.ldap[0].principalAttributePassword=
cas.authn.ldap[0].principalAttributeList=userStatus,tryCount,uid,CN,email
cas.authn.ldap[0].minPoolSize=3
cas.authn.ldap[0].maxPoolSize=10
cas.authn.ldap[0].validateOnCheckout=true
cas.authn.ldap[0].validatePeriodically=true
cas.authn.ldap[0].validatePeriod=600
cas.authn.ldap[0].failFast=false
cas.authn.ldap[0].idleTime=5000
cas.authn.ldap[0].prunePeriod=5000
cas.authn.ldap[0].blockWaitTime=5000

*Hazelcast properties*
cas.ticket.registry.hazelcast.page-size=500
#cas.ticket.registry.hazelcast.cluster.size=3
cas.ticket.registry.hazelcast.cluster.members=10.34.xxx.58,10.34.xxx.57,10.34.xxx.59
cas.ticket.registry.hazelcast.cluster.instance-name=10.34.xxx.57*(have 
given this correctly for all server instances)*
cas.ticket.registry.hazelcast.cluster.port=5701
cas.ticket.registry.hazelcast.enable-compression=false
cas.ticket.registry.hazelcast.enable-management-center-scripting=true
cas.ticket.registry.hazelcast.crypto.enabled=true
cas.ticket.registry.hazelcast.cluster.asyncBackupCount=1
cas.ticket.registry.hazelcast.cluster.backupCount=0
cas.ticket.registry.hazelcast.crypto.signing.key=7cQ-XUjlbIWahxBUD8IVVW6j7erYyuAmXn7m4O4CpdNpPaxNf1P5ka1JPa-V_T2UryZYtRPOzy1rhjIGQ7kQug
cas.ticket.registry.hazelcast.crypto.signing.keySize=512
cas.ticket.registry.hazelcast.crypto.encryption.key=Sx1MbKtfrP-36ysDRkNXWA
cas.ticket.registry.hazelcast.crypto.encryption.keySize=16
cas.ticket.registry.hazelcast.crypto.alg=AES

CAS server Logs:
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Creating LDAP principal 
for [*[email protected] <https://groups.google.com/>*] based on [uid=
*8886927f-ea0f-4129-8097-b72e52a58591*,ou=secure,dc=Consumer,dc=insurance,dc=com]
 
and attributes [[uid, cn, email, userStatus, tryCount]]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Retrieved principal id 
attribute [[email protected] <https://groups.google.com/>]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  LDAP principal 
identifier created is [[email protected] <https://groups.google.com/>]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  The following 
attributes are requested to be retrieved and mapped: [[]]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Found principal 
attribute: [org.ldaptive.LdapAttribute@-384702864::name=uid, 
values=[8886927f-ea0f-4129-8097-b72e52a58591], binary=false]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Principal attribute 
[org.ldaptive.LdapAttribute@-384702864::name=uid, 
values=[8886927f-ea0f-4129-8097-b72e52a58591], binary=false] is virtually 
remapped/renamed to [uid]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Found principal 
attribute: [org.ldaptive.LdapAttribute@-1753954665::name=userStatus, 
values=[ACTIVE], binary=false]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Principal attribute 
[org.ldaptive.LdapAttribute@-1753954665::name=userStatus, values=[ACTIVE], 
binary=false] is virtually remapped/renamed to [userStatus]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Found principal 
attribute: [org.ldaptive.LdapAttribute@-1505406878::name=tryCount, 
values=[0:1626509309221], binary=false]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Principal attribute 
[org.ldaptive.LdapAttribute@-1505406878::name=tryCount, 
values=[0:1626509309221], binary=false] is virtually remapped/renamed to 
[tryCount]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Found principal 
attribute: [org.ldaptive.LdapAttribute@-397428133::name=cn, 
values=[8886927f-ea0f-4129-8097-b72e52a58591], binary=false]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Principal attribute 
[org.ldaptive.LdapAttribute@-397428133::name=cn, 
values=[8886927f-ea0f-4129-8097-b72e52a58591], binary=false] is virtually 
remapped/renamed to [CN]
2021-07-17 01:33:30 [INFO] 
com.ex.authentication.MigLdapHandlerAuthentication  Found principal 
attribute: [org.ldaptive.LdapAttribute@-930300140::name=email, values=[
[email protected] <https://groups.google.com/>], binary=false]
2021-07-17 01:33:30 [INFO] 
com.mig.sso.authentication.MigLdapHandlerAuthentication  Principal 
attribute [org.ldaptive.LdapAttribute@-930300140::name=email, values=[
[email protected] <https://groups.google.com/>], binary=false] is virtually 
remapped/renamed to [email]
2021-07-17 01:33:30 [INFO] 
com.mig.sso.authentication.MigLdapHandlerAuthentication  Created LDAP 
principal for id [[email protected] <https://groups.google.com/>] and [5] 
attributes

2021-07-17 01:33:31 [INFO] 
org.apereo.inspektr.audit.support.Slf4jLoggingAuditTrailManager  Audit 
trail record BEGIN
=============================================================
WHO: [email protected] <https://groups.google.com/>
WHAT: ST-1-l59MuWtx-WFlDsTQi42nww2riqQ-braxlcpa211 for 
https://qa5-ex.insurance.com/home/
ACTION: SERVICE_TICKET_CREATED
APPLICATION: CAS
WHEN: Sat Jul 17 01:33:31 PDT 2021
CLIENT IP ADDRESS: 10.34.ss.30
SERVER IP ADDRESS: 10.34.xxx.53
=============================================================


2021-07-17 01:33:31 [INFO] 
org.apereo.inspektr.audit.support.Slf4jLoggingAuditTrailManager  Audit 
trail record BEGIN
=============================================================
WHO: audit:unknown
WHAT: [result=Service Access Granted,service=
https://qa5-cp.mercuryinsurance.com/c...,principal=SimplePrincipal(id=*[email protected]
 
<https://groups.google.com/>,* 
attributes={CN=[8886927f-ea0f-4129-8097-b72e52a58591], 
uid=[*8886927f-ea0f-4129-8097-b72e52a58591*]}),requiredAttributes={}]
ACTION: SERVICE_ACCESS_ENFORCEMENT_TRIGGERED
APPLICATION: CAS
WHEN: Sat Jul 17 01:33:31 PDT 2021
CLIENT IP ADDRESS: 10.34.xx.6
SERVER IP ADDRESS: 10.34.xxx.53
=============================================================


2021-07-17 01:35:26 [INFO] 
org.apereo.inspektr.audit.support.Slf4jLoggingAuditTrailManager  Audit 
trail record BEGIN
=============================================================
WHO: audit:unknown
WHAT: [result=Service Access 
Granted,service=https://brextt051.int.mgc.com:11111...,principal=SimplePrincipal(id=*[email protected]
 
<https://groups.google.com/>*, attributes={uid=[
*6666927f-ea0f-4129-8097-b72e52a58591*], userStatus=[ACTIVE], 
tryCount=[0:1626509309221], CN=[6666927f-ea0f-4129-8097-b72e52a58591], 
email=[[email protected] <https://groups.google.com/>]}),requiredAttributes={}]
ACTION: SERVICE_ACCESS_ENFORCEMENT_TRIGGERED
APPLICATION: CAS
WHEN: Sat Jul 17 01:35:26 PDT 2021
CLIENT IP ADDRESS: 10.34.xx.30
SERVER IP ADDRESS: 10.34.xxx.55
=============================================================


Will be really grateful if someone help me with the fix.

Regards,
Anusuya.

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