Sure. I'll give it a few minor releases and then try again 🙂 Thanks for the responses @<1722061389024989184:profile|ResponsiveKoala38> !

Hi @<1523701601770934272:profile|GiganticMole91> , I do not see any difference that could lead to Elasticsearch from v1.16 not being able to start from the data that was stored in v1.15. Probably some more information can be retrieved from ES logs right after the upgrade and services restart. If there are some reasons the prevent ES from loading the existing data they may be listed in the logs

Sorry for the late reply @<1722061389024989184:profile|ResponsiveKoala38> . So this is the diff between my local version (hosted together on a single server with docker-compose). Does anything spring to mind?

diff --git a/docker-compose.yml b/docker-compose.diff.yml
index c6b49e1..07f7f43 100644
--- a/docker-compose.yml
+++ b/docker-compose.diff.yml
@@ -5,7 +5,7 @@ services:
     command:
     - apiserver
     container_name: clearml-apiserver
-    image: allegroai/clearml:1.15.0
+    image: allegroai/clearml:latest
     restart: unless-stopped
     volumes:
     - /opt/clearml/logs:/var/log/clearml
@@ -19,17 +19,18 @@ services:
     environment:
       CLEARML_ELASTIC_SERVICE_HOST: elasticsearch
       CLEARML_ELASTIC_SERVICE_PORT: 9200
-      CLEARML_ELASTIC_SERVICE_PASSWORD: ${ELASTIC_PASSWORD}
       CLEARML_MONGODB_SERVICE_HOST: mongo
       CLEARML_MONGODB_SERVICE_PORT: 27017
       CLEARML_REDIS_SERVICE_HOST: redis
       CLEARML_REDIS_SERVICE_PORT: 6379
-      CLEARML_SERVER_DEPLOYMENT_TYPE: ${CLEARML_SERVER_DEPLOYMENT_TYPE:-linux}
+      CLEARML_SERVER_DEPLOYMENT_TYPE: linux
       CLEARML__apiserver__pre_populate__enabled: "true"
       CLEARML__apiserver__pre_populate__zip_files: "/opt/clearml/db-pre-populate"
       CLEARML__apiserver__pre_populate__artifacts_path: "/mnt/fileserver"
       CLEARML__services__async_urls_delete__enabled: "true"
       CLEARML__services__async_urls_delete__fileserver__url_prefixes: "[${CLEARML_FILES_HOST:-}]"
+      CLEARML__secure__credentials__services_agent__user_key: ${CLEARML_AGENT_ACCESS_KEY:-}
+      CLEARML__secure__credentials__services_agent__user_secret: ${CLEARML_AGENT_SECRET_KEY:-}
     ports:
     - "8008:8008"
     networks:
@@ -41,8 +42,6 @@ services:
       - backend
     container_name: clearml-elastic
     environment:
-      ES_JAVA_OPTS: -Xms2g -Xmx2g -Dlog4j2.formatMsgNoLookups=true
-      ELASTIC_PASSWORD: ${ELASTIC_PASSWORD}
       bootstrap.memory_lock: "true"
       cluster.name: clearml
       cluster.routing.allocation.node_initial_primaries_recoveries: "500"
@@ -74,7 +73,7 @@ services:
     command:
     - fileserver
     container_name: clearml-fileserver
-    image: allegroai/clearml:1.15.0
+    image: allegroai/clearml:latest
     environment:
       CLEARML__fileserver__delete__allow_batch: "true"
     restart: unless-stopped
@@ -111,12 +110,12 @@ services:
     container_name: clearml-webserver
     # environment:
     #  CLEARML_SERVER_SUB_PATH : clearml-web # Allow Clearml to be served with a URL path prefix.
-    image: allegroai/clearml:1.15.0
+    image: allegroai/clearml:latest
     restart: unless-stopped
     depends_on:
       - apiserver
     ports:
-    - "80:80"
+    - "8080:80"
     networks:
       - backend
       - frontend
@@ -129,14 +128,13 @@ services:
       - elasticsearch
       - fileserver
     container_name: async_delete
-    image: allegroai/clearml:1.15.0
+    image: allegroai/clearml:latest
     networks:
       - backend
     restart: unless-stopped
     environment:
       CLEARML_ELASTIC_SERVICE_HOST: elasticsearch
       CLEARML_ELASTIC_SERVICE_PORT: 9200
-      CLEARML_ELASTIC_SERVICE_PASSWORD: ${ELASTIC_PASSWORD}
       CLEARML_MONGODB_SERVICE_HOST: mongo
       CLEARML_MONGODB_SERVICE_PORT: 27017
       CLEARML_REDIS_SERVICE_HOST: redis
@@ -157,7 +155,7 @@ services:
     networks:
       - backend
     container_name: clearml-agent-services
-    image: allegroai/clearml-agent-services:services-1.3.0-77
+    image: allegroai/clearml-agent-services:latest
     deploy:
       restart_policy:
         condition: on-failure
@@ -167,8 +165,8 @@ services:
       CLEARML_WEB_HOST: ${CLEARML_WEB_HOST:-}
       CLEARML_API_HOST: 

       CLEARML_FILES_HOST: ${CLEARML_FILES_HOST:-}
-      CLEARML_API_ACCESS_KEY: ${CLEARML_API_ACCESS_KEY:-}
-      CLEARML_API_SECRET_KEY: ${CLEARML_API_SECRET_KEY:-}
+      CLEARML_API_ACCESS_KEY: ${CLEARML_AGENT_ACCESS_KEY:-$CLEARML_API_ACCESS_KEY}
+      CLEARML_API_SECRET_KEY: ${CLEARML_AGENT_SECRET_KEY:-$CLEARML_API_SECRET_KEY}
       CLEARML_AGENT_GIT_USER: ${CLEARML_AGENT_GIT_USER}
       CLEARML_AGENT_GIT_PASS: ${CLEARML_AGENT_GIT_PASS}
       CLEARML_AGENT_UPDATE_VERSION: ${CLEARML_AGENT_UPDATE_VERSION:->=0.17.0}

@<1523701601770934272:profile|GiganticMole91> Is your ES deployment a single node or a cluster? If you compare the elaststicsearch section of the docker compose of your currently working version (1.15.0) and then one that you tried to install (v1.16) do you see any difference?

It's running v7.17.18 @<1722061389024989184:profile|ResponsiveKoala38>

Hi @<1523701601770934272:profile|GiganticMole91> , what is the exact version of Elasticsearch that is running now in your 1.15.0 installation? You can see it in the output of 'sudo docker ps'

I think its possible there was an upgrade in Elastic, I'd suggest going over the release notes to see if this happened with the server