# Lost classes in schema **URL:** \ **Category:** Support\ **Created:** [June 9, 2023, 8:08am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159 "2023-06-09T08:08:26Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Olivier\_Terrier](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/olivier_terrier/32/137_2.png) [@Olivier\_Terrier](https://forum.weaviate.io/u/Olivier_Terrier)\ **Post date:** [June 9, 2023, 8:08am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/1 "2023-06-09T08:08:26Z")
I have created 2 classes in my weaviate instance and populated them with data I can see them in the /var/lib/weaviate directory in my docker container But after a restart of the weaviate container, suddenly a call to `curl http://localhost:8080/v1/schema` returns ```auto {"classes":[]} ``` How is it possible? any idea ? Thanks Olivier ---
**Author:** ![hsm207](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/hsm207/32/19_2.png) [@hsm207](https://forum.weaviate.io/u/hsm207)\ **Post date:** [June 9, 2023, 8:37am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/2 "2023-06-09T08:37:52Z")
did you [mount](https://docs.docker.com/storage/bind-mounts/#use-a-bind-mount-with-compose) `/var/lib/weaviate` to somewhere on your local storage? ---
**Author:** ![Olivier\_Terrier](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/olivier_terrier/32/137_2.png) [@Olivier\_Terrier](https://forum.weaviate.io/u/Olivier_Terrier)\ **Post date:** [June 9, 2023, 8:44am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/3 "2023-06-09T08:44:17Z")
Yes, I’m using a docker volume mounted via docker compose ---
**Author:** ![Olivier\_Terrier](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/olivier_terrier/32/137_2.png) [@Olivier\_Terrier](https://forum.weaviate.io/u/Olivier_Terrier)\ **Post date:** [June 9, 2023, 8:45am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/4 "2023-06-09T08:45:53Z")
The content of the directory “survives” after a container restart, I can see perfectly the index files with the name of my classes, but apparently the schema is empty ---
**Author:** ![hsm207](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/hsm207/32/19_2.png) [@hsm207](https://forum.weaviate.io/u/hsm207)\ **Post date:** [June 9, 2023, 8:56am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/5 "2023-06-09T08:56:13Z")
can you share your docker-compose.yml? ---
**Author:** ![Olivier\_Terrier](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/olivier_terrier/32/137_2.png) [@Olivier\_Terrier](https://forum.weaviate.io/u/Olivier_Terrier)\ **Post date:** [June 9, 2023, 9:02am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/6 "2023-06-09T09:02:04Z")
A fragment: ```auto version: '3.4' services: ############################################################################################ # WEAVIATE sherpa-weaviate: container_name: "sherpa-weaviate" image: semitechnologies/weaviate:1.19.5 runtime: nvidia environment: - TRANSFORMERS_INFERENCE_API=http://localhost:18082 - QUERY_DEFAULTS_LIMIT=25 - AUTHENTICATION_ANONYMOUS_ACCESS_ENABLED=true - PERSISTENCE_DATA_PATH=/var/lib/weaviate #- DEFAULT_VECTORIZER_MODULE=text2vec-openai - DEFAULT_VECTORIZER_MODULE=text2vec-transformers - ENABLE_MODULES=backup-filesystem,text2vec-transformers,generative-openai,text2vec-openai,text2vec-huggingface - CLUSTER_HOSTNAME=node1 - BACKUP_FILESYSTEM_PATH=/var/lib/weaviate_backup volumes: - wadata:/var/lib/weaviate - wabackup:/var/lib/weaviate_backup network_mode: host hostname: localhost command: - --host - 0.0.0.0 - --port - '18081' - --scheme - http restart: always ############################################################################################ # T2V-TRANSFORMERS sherpa-t2v-transformers: container_name: "sherpa-t2v-transformers" #image: semitechnologies/transformers-inference:sentence-transformers-all-MiniLM-L12-v2 #image: semitechnologies/transformers-inference:sentence-transformers-paraphrase-multilingual-mpnet-base-v2 #image: kairntech/transformers-inference:sentence-camembert-base image: kairntech/transformers-inference:flaubert-base-uncased-xnli-sts runtime: nvidia environment: - ENABLE_CUDA=1 - NVIDIA_VISIBLE_DEVICES=all - T2V_TRANSFORMERS_DIRECT_TOKENIZE=1 network_mode: host hostname: localhost working_dir: /app entrypoint: uvicorn command: ["app:app", "--host", "0.0.0.0", "--port", "18082"] ############################################################################################ volumes: wadata: driver: local name: sherpa_wadata wabackup: driver: local name: sherpa_wabackup ``` ---
**Author:** ![Olivier\_Terrier](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/olivier_terrier/32/137_2.png) [@Olivier\_Terrier](https://forum.weaviate.io/u/Olivier_Terrier)\ **Post date:** [June 9, 2023, 9:03am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/7 "2023-06-09T09:03:24Z")
It works perfectly well and resist to restart But once I had this problem: schema empty unless the classes are still present in the /var/lib/weaviate dir ---
**Author:** ![hsm207](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/hsm207/32/19_2.png) [@hsm207](https://forum.weaviate.io/u/hsm207)\ **Post date:** [June 9, 2023, 9:06am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/8 "2023-06-09T09:06:02Z")
> [@Olivier\_Terrier](#): > > But once I had this problem: schema empty unless the classes are still present in the /var/lib/weaviate dir Could you clarify what you mean? Are you saying the problem has disappeared? ---
**Author:** ![Olivier\_Terrier](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/olivier_terrier/32/137_2.png) [@Olivier\_Terrier](https://forum.weaviate.io/u/Olivier_Terrier)\ **Post date:** [June 9, 2023, 9:34am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/9 "2023-06-09T09:34:47Z")
I’m just saying that most of the time it works like a charm but I had the problem once without any explanation that’s why I was asking if it is a known problem ? or is there a way to restore the schema when the index files of the classes are still present on the disk? ---
**Author:** ![hsm207](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/hsm207/32/19_2.png) [@hsm207](https://forum.weaviate.io/u/hsm207)\ **Post date:** [June 13, 2023, 5:09am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/10 "2023-06-13T05:09:27Z")
no, it is not a known problem. Could you please file a bug report so our engineers can look into this? ---
**Author:** ![sebawita](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.weaviate.io/sebawita/32/5_2.png) [@sebawita](https://forum.weaviate.io/u/sebawita)\ **Post date:** [August 8, 2023, 10:50am UTC](https://forum.weaviate.io/t/lost-classes-in-schema/159/11 "2023-08-08T10:50:02Z")
Split this topic on August 8, 2023, 10:50am UTC 2 posts were split to a new topic: [Adding backup module – don’t want to lose my data](https://forum.weaviate.io/t/adding-backup-module-dont-want-to-lose-my-data/489)