# Confluent Control center shows Up but doesn't open localhost:9021 **URL:** \ **Category:** Kafka Connect\ **Created:** [7 May 2025 18:56 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763 "2025-05-07T18:56:49Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Magnus](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@Magnus](https://forum.confluent.io/u/Magnus)\ **Post date:** [7 May 2025 18:56 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/1 "2025-05-07T18:56:49Z")
Basically, I downloaded Confluent 7.9 with Oracle JDK11 and configured /etc/kafka/server.properties for listeners & advertised listeners & adding Confluent\_HOME env variable then I run confluent local services start all services are up & control center is Up too but when I tried to test its link curl -V [http://localhost:9021](http://localhost:9021) \>\>\> connection refused & no firewall issues I checked the logs using confluent local services control-center log, it shows Error \>\>\> failed to start topology (io.confluent.controlcenter.application.AllControlCenter) java.util.concurrent.TimeoutException) Any clue for this please? ---
**Author:** ![Magnus](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@Magnus](https://forum.confluent.io/u/Magnus)\ **Post date:** [8 May 2025 05:42 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/2 "2025-05-08T05:42:56Z")
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**Author:** ![mmuehlbeyer](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.confluent.io/mmuehlbeyer/32/1088_2.png) [@mmuehlbeyer](https://forum.confluent.io/u/mmuehlbeyer)\ **Post date:** [8 May 2025 07:17 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/3 "2025-05-08T07:17:14Z")
probably control center tries to connect to localhost and as you’ve changed advertised listener and so on it might lead to an error in connecting to the broker. what did you change in server.properties? what happens if you rollback the change? michael ---
**Author:** ![Magnus](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@Magnus](https://forum.confluent.io/u/Magnus)\ **Post date:** [8 May 2025 07:22 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/4 "2025-05-08T07:22:19Z")
This post was flagged by the community and is temporarily hidden. ---
**Author:** ![mmuehlbeyer](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.confluent.io/mmuehlbeyer/32/1088_2.png) [@mmuehlbeyer](https://forum.confluent.io/u/mmuehlbeyer)\ **Post date:** [8 May 2025 07:27 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/5 "2025-05-08T07:27:03Z")
mmh what happens if you start without that config file? so just: `confluent local service start`? a config should then be generated by the tool itself ---
**Author:** ![Magnus](https://avatars.discourse-cdn.com/v4/letter/m/e9c0ed/32.png) [@Magnus](https://forum.confluent.io/u/Magnus)\ **Post date:** [8 May 2025 07:31 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/6 "2025-05-08T07:31:35Z")
This post was flagged by the community and is temporarily hidden. ---
**Author:** ![mmuehlbeyer](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.confluent.io/mmuehlbeyer/32/1088_2.png) [@mmuehlbeyer](https://forum.confluent.io/u/mmuehlbeyer)\ **Post date:** [8 May 2025 07:49 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/7 "2025-05-08T07:49:27Z")
correct, let me know what happens ---
**Author:** ![Joe](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.confluent.io/joe/32/156_2.png) [@Joe](https://forum.confluent.io/u/Joe)\ **Post date:** [9 May 2025 15:51 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/9 "2025-05-09T15:51:42Z")
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**Author:** ![system](https://us1.discourse-cdn.com/flex019/uploads/confluentcommunity/original/1X/c49438c90c9df282e9996fdf6971be890c71b65a.svg) [@system](https://forum.confluent.io/u/system)\ **Post date:** [8 June 2025 15:52 UTC](https://forum.confluent.io/t/confluent-control-center-shows-up-but-doesnt-open-localhost-9021/37763/10 "2025-06-08T15:52:18Z")
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