Hi Wes, thank you for your response. In my case also,  when the cas webapp 
is running, the ticket registry remains functional. But if 
redis-stack-server is down on one node, I cannot restart cas on this node 
(tomcat webapp in my case), it just crashes ... because it's trying to 
reach redis only on this node. Could you test to reproduce this behavior 
sometime on your side ? 
(With  redis.enable-redis-search= false, in the exact same context, the 
webapp is able to restart)

Many thanks !

Le jeudi 15 janvier 2026 à 20:52:31 UTC+1, Wes Conley a écrit :

> Yes, here's my sentinel config. I've confirmed the ticket registry remains 
> functional when the master node changes (in this case 1.2.3.4 goes down). I 
> have not tested what happens when the master node is different than 1.2.3.4 
> on startup, but generally speaking 1.2.3.4 remains master.
>
> cas.ticket.registry.redis.host="1.2.3.4"
> cas.ticket.registry.redis.password="redacted"
> cas.ticket.registry.redis.port="6380"
>
> cas.ticket.registry.redis.sentinel.master="redis-casdev"
> cas.ticket.registry.redis.sentinel.node[0]="1.2.3.5:26380"
> cas.ticket.registry.redis.sentinel.node[1]="1.2.3.4:26380"
> cas.ticket.registry.redis.sentinel.node[2]="1.2.3.6:26380"
>
> On Wednesday, January 14, 2026 at 11:45:03 AM UTC-5 Frédéric Dussurget 
> wrote:
>
>> Hi Prakash,
>> I went a little further, below here is what I've done. My context is 
>> redis + redis sentinel nodes.
>>
>> First, I did a dist upgrade from debian 11 to 12
>> Having read Wes comment, I used the Following apt source list to upgrade 
>> redis from 6.x to 7.4.0-v8 (have a look with "apt policy redis"):
>>  deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] 
>> https://packages.redis.io/deb bullseye main (yes I know it is bullseye 
>> on a bookworm …)
>>
>> I replaced distrib packages redis-server and redis-sentinel to 
>> redis-stack-server which handles redis server and sentinel. I created new 
>> services using old /etc/redis/redis.conf and /etc/redis/sentinel.conf with 
>> the same binary /opt/redis-stack/bin/redis-stack-server.
>>
>> I updated /etc/redis/redis.conf with the new redisearch module path, as 
>> said Wes :
>> loadmodule /opt/redis-stack/lib/redisearch.so 
>>
>> Then I eventually stopped and disabled the old ones then enabled and 
>> activated the new ones 
>>
>> this done, the bundled redisearch module changed from v1.2.0 
>> (redisearch.so from deb 11 distrib) to to v2.xx  :
>>
>> 127.0.0.1:6379> MODULE LIST
>> 1) 1) "name"
>>    2) "search"
>>    3) "ver"
>>    4) (integer) 21020
>>    5) "path"
>>    6) "/opt/redis-stack/lib/redisearch.so"
>>    7) "args"
>>    8) (empty array)
>>
>> For info, with redis packages from debian 11 I had this redisearch 
>> version :
>> 4) (integer) 10200
>>
>>
>> Then I edit acl on my user on every nodes and thru sentinel connecting on 
>> port 26379, I Added the &* so that my user can subscribe to the "channels" 
>> pub/sub : 
>> 127.0.0.1:6379>ACL SETUSER myuser on nopass ~* &* +@all
>> 127.0.0.1:6379> acl list
>> 1) "user myuser on sanitize-payload #a9a9a9a9b8b8b8b8c7c7c7blahblah ~* &* 
>> +@all"
>>
>> I finally turned redis.enable-redis-search to true and … it's finally 
>> working.
>>
>> But I've got a new issue : this parameter does not look to support 
>> sentinel : when I stop my redis server service on node 1, redisearch looks 
>> for localhost and does not use sentinel backup on the other nodes, in the 
>> logs I have : Caused by: 
>> io.netty.channel.AbstractChannel$AnnotatedConnectException: 
>> finishConnect(..) failed: Connection refused: localhost/127.0.0.1:6379 
>> and cas won't start if I restart the tomcat service.
>> When my redis-stack-service is stopped on node 1 and 
>> redis.enable-redis-search set to false, sentinel works perfectly and cas 
>> talks to redis servers running on the other nodes. So, for now, I cannot 
>> set this parameter to "true".
>>
>> If you do not use sentinel, this might be ok for you ...
>>
>> I might have forgotten Something somewhere … ? Is it worth giving a try 
>> on debian 13 trixie with redis 8+ ?
>>
>> To Wes, are you using sentinel nodes ?
>>
>> Regards,
>>
>> Le mardi 13 janvier 2026 à 07:23:10 UTC+1, Prakash Thapa a écrit :
>>
>>> Thank You all for responses.
>>>
>>> Olivier,
>>> Turning off the redis-search worked fine for me as well and I have used 
>>> same configuration. However, this might not be a actual solution.
>>>
>>>
>>> Wes,
>>> I am not sure whether it is compatibility issue. I tried with local 
>>> Redis and the AWS Elasticache. The issue seems to be on build/beans 
>>> initialization itself rather than while making connection.
>>> On Tuesday, January 13, 2026 at 4:07:12 AM UTC+5:45 Wes Conley wrote:
>>>
>>>> It may be that your redis server doesn't support redis search. I'm 
>>>> successfully using redis-stack-server:7.2.0-v18 (
>>>> https://hub.docker.com/r/redis/redis-stack-server) 
>>>> with cas.ticket.registry.redis.enable-redis-search=true. In my redis.conf 
>>>> I 
>>>> load the redis search library.
>>>>
>>>> loadmodule /opt/redis-stack/lib/redisearch.so.
>>>>
>>>> On Monday, January 12, 2026 at 11:56:21 AM UTC-5 Olivier wrote:
>>>>
>>>>> Hi Prakash,
>>>>>
>>>>> I had the same issue when upgrading CAS from 6.6 to 7.3 with AWS 
>>>>> Elasticache Redis.
>>>>> This has been solved by adding the following property: 
>>>>> cas.ticket.registry.redis.enable-redis-search=false
>>>>> I’m not sure if there is a better solution but it worked for me, 
>>>>> although I have not performed any performance test yet, so, I’m not yet 
>>>>> sure if there will be any performance impact.
>>>>>
>>>>> Thanks.
>>>>> Olivier Begon.
>>>>> Florida State University.
>>>>>
>>>>> On Friday, January 9, 2026 at 7:38:17 AM UTC-5 Prakash Thapa wrote:
>>>>>
>>>>> I am trying to integrate Redis Ticket Registry for CAS 7.2.4. And I 
>>>>> ran into following error while running my CAS
>>>>>
>>>>> *Caused by: org.springframework.beans.factory.BeanCreationException: 
>>>>> Error creating bean with name 'redisModulesOperations' defined in class 
>>>>> path resource 
>>>>> [org/apereo/cas/config/CasRedisTicketRegistryAutoConfiguration$RedisTicketRegistryModulesConfiguration.class]:
>>>>>  
>>>>> Failed to instantiate [org.apereo.cas.redis.core.RedisModulesOperations]: 
>>>>> Factory method 'redisModulesOperations' threw exception with message: 
>>>>> Redis 
>>>>> server does not support Redis Modules*
>>>>>
>>>>> The issue seem to arise from following block of code of class 
>>>>> 'CasRedisTicketRegistryAutoConfiguration':
>>>>>
>>>>> val operations = redisModulesOperations.stream().filter(BeanSupplier::
>>>>> isNotProxy).findFirst();
>>>>> return new RedisTicketRegistry(cipher, ticketSerializationManager, 
>>>>> ticketCatalog, applicationContext,
>>>>> casRedisTemplates, redisTicketRegistryCache, 
>>>>> redisTicketRegistryMessagePublisher,
>>>>> operations, redisKeyGeneratorFactory, adapter, casProperties);
>>>>>
>>>>> The config is:
>>>>>
>>>>> cas:
>>>>> ticket:
>>>>> registry:
>>>>> redis:
>>>>> # Redis server host
>>>>> host: "localhost"
>>>>> port: 6379
>>>>> password: "your-redis-password"
>>>>> database: 0
>>>>> enabled: true
>>>>> crypto:
>>>>> enabled: true
>>>>> encryption:
>>>>> key: "YourEncryptionKeyMustBeAtLeast256Bits"
>>>>> signing:
>>>>> key: "YourSigningKeyMustBeAtLeast256Bits"
>>>>>
>>>>> I have added following dependencies:
>>>>> implementation(
>>>>> "org.apereo.cas:cas-server-support-redis-ticket-registry:${project.
>>>>> 'cas.version'}")
>>>>> implementation("org.apereo.cas:cas-server-support-redis-modules:${
>>>>> project.'cas.version'}")
>>>>>
>>>>>

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