[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"problem-detail-error-start-app-the-service-project-web-did-not":3},{"stack":4,"error":5,"seoName":6,"seoStack":7,"seo":8,"breadcrumb":10,"titlePrefix":18,"titleAccent":19,"lead":20,"facts":23,"why":38,"log":41,"fix":49,"engine":53,"related":57,"pitch":64},"compose","start-app-the-service-project-web-did-not","Failed to start app","Docker Compose",{"description":9},"Learn what causes Failed to start app, how PanelAlpha Engine responds to it during deployment.",[11,14,16],{"label":12,"href":13},"App Installations","\u002Fapps",{"label":7,"href":15},"\u002Fapps\u002Fstacks\u002Fcompose",{"label":17},"Failed to start app: The service project-web-1 did not start (unhealthy), so the application was not started either. It printed: 2026\u002F09\u002F29 23:12:00 [emerg] 1#1: host not found in upstream \"api\" in \u002Fetc\u002Fnginx\u002Fconf.d\u002Fnginx-mempool.conf:56 nginx: [emerg] host not found in upstream \"api\" in \u002Fetc\u002Fnginx\u002Fconf.d\u002Fnginx-mempool.conf:56 \u002Fvar\u002Fwww\u002Fmempool\u002Fbrowser\u002Fresources 2026\u002F09\u002F29 23:12:01 [emerg] 1#1: host not found in upstream \"api\" in \u002Fetc\u002Fnginx\u002Fconf.… The full output is in the deploy log. | Deploy …","Failed to start app: ","The service project-web-1 did not start (unhealthy), so the application was not started either. It printed: 2026\u002F09\u002F29 23:12:00 [emerg] 1#1: host not found in upstream \"api\" in \u002Fetc\u002Fnginx\u002Fconf.d\u002Fnginx-mempool.conf:56 nginx: [emerg] host not found in upstream \"api\" in \u002Fetc\u002Fnginx\u002Fconf.d\u002Fnginx-mempool.conf:56 \u002Fvar\u002Fwww\u002Fmempool\u002Fbrowser\u002Fresources 2026\u002F09\u002F29 23:12:01 [emerg] 1#1: host not found in upstream \"api\" in \u002Fetc\u002Fnginx\u002Fconf.… The full output is in the deploy log. | Deploy …",[21],{"text":22},"Error recorded 1 times in PanelAlpha Engine deploys on Docker Compose. The deploy log below is the recorded failure output.",[24,29,32,34],{"label":25,"value":26,"tone":27,"tooltip":28},"Type","Error","err","An error that occurred in the deployed application. It is not necessarily a PanelAlpha Engine error, but we keep working on improvements so you run into fewer of them.",{"label":30,"value":31},"Seen","1 times",{"label":33,"value":7},"Where",{"label":35,"value":36,"tooltip":37},"Status","Observed","Our team will look into this soon, verify the cause and try to fix it in an upcoming release.",{"heading":39,"body":40},"",[],{"heading":42,"block":43},"What the log looks like",{"header":44,"lines":45},"Deploy log",[46],{"segments":47},[48],{"text":17},{"heading":39,"steps":50,"block":51},[],{"header":39,"lines":52},[],{"heading":39,"body":54,"block":55},[],{"header":39,"lines":56},[],{"heading":58,"items":59},"Apps affected",[60],{"title":61,"badge":62,"tone":27,"href":63},"Mempool","1 occurrence","\u002Fapps\u002Fmempool\u002Fmempool",{"heading":65,"body":66,"footNote":67,"docsLabel":68,"docsHref":69},"Try PanelAlpha Engine yourself.","The easiest way to turn your server into a safe, controlled environment for your AI agent. Deploy, manage and maintain any project from Claude Code, Cursor, Codex or any other MCP client. Open source under Apache 2.0, free to run.","Requires Ubuntu 24.04 or 26.04 · 2 GB RAM · 1 CPU","Read the documentation","https:\u002F\u002Fpanelalpha.com\u002Fdocs"]