{"record":{"id":"a4fc4b1d6fad81eb","repo":"astrid-runtime/astrid","slug":"detached-fuse-service-failed-message","errorCode":null,"errorMessage":"detached FUSE service failed: {message}","messagePattern":"detached FUSE service failed: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/astrid-storage-provider-fuse/src/main.rs","lineNumber":724,"sourceCode":"    match serde_json::from_str(&line)? {\n        ServiceStartup::Ready {\n            mount_id,\n            pid,\n            access,\n        } => {\n            if !control_path.exists() {\n                bail!(\"detached FUSE service did not retain its control endpoint\");\n            }\n            if pid == 0 {\n                bail!(\"detached FUSE service returned an invalid process identity\");\n            }\n            Ok(ControlReady {\n                mount_id,\n                pid,\n                access,\n            })\n        },\n        ServiceStartup::Error { message } => bail!(\"detached FUSE service failed: {message}\"),\n    }\n}\n\n#[derive(Debug)]\nstruct ControlReady {\n    mount_id: StorageMountId,\n    pid: u32,\n    access: StorageProviderAccessV1,\n}\n\n#[derive(Debug, Deserialize)]\nstruct LeaseStatus {\n    #[allow(dead_code)]\n    mount_id: StorageMountId,\n    access: StorageProviderAccessV1,\n    mountpoint: PathBuf,\n    dirty: bool,\n}","sourceCodeStart":706,"sourceCodeEnd":742,"githubUrl":"https://github.com/astrid-runtime/astrid/blob/affd8760f44190dbdfbec23403f4c4b642c33112/crates/astrid-storage-provider-fuse/src/main.rs#L706-L742","documentation":"This wraps a structured failure reported by the FUSE service itself. The child mounted nothing, sent ServiceStartup::Error { message } over stdout, and the parent re-raises that message prefixed with context. The root cause text after the colon comes from inside the service (FUSE mount failure, permission denied on the mountpoint, kernel registration rejection, etc.).","triggerScenarios":"The detached FUSE service fails during startup and deliberately reports it: fuse mount syscall fails, mountpoint doesn't exist or is busy, kernel storage-mount lease cannot be acquired, launch config deserialization fails inside the service.","commonSituations":"Mountpoint directory missing or already in use; fusermount/fuse kernel module unavailable or unprivileged user mounts disabled (/proc/sys/fs/unprivileged_userfusermount); stale registry entry pointing at a dead lease; malformed launch JSON from a version mismatch.","solutions":["Read the embedded {message} in the error — it names the service-side root cause; fix that directly","Verify the mountpoint exists, is an empty directory, and is not already mounted","Check FUSE availability: fuse kernel module loaded, fusermount3 installed, unprivileged mounts enabled","Confirm parent and service binaries are from the same version so the launch JSON deserializes"],"exampleFix":"null","handlingStrategy":"try-catch","validationCode":"// Pre-flight checks before launching the service\nif !mountpoint.exists() { return Err(anyhow!(\"mountpoint {} does not exist\", mountpoint.display())); }\nif mountpoint_is_busy(mountpoint)? { return Err(anyhow!(\"mountpoint already in use\")); }\nensure_fuse_available()?; // fusermount3 present, module loaded, unprivileged mounts allowed","typeGuard":null,"tryCatchPattern":"match start_detached_service(&launch).await {\n    Err(e) if e.to_string().contains(\"detached FUSE service failed:\") => {\n        let cause = e.to_string().split(\"detached FUSE service failed: \").nth(1).unwrap_or(\"\");\n        eprintln!(\"service-side failure: {cause}\"); // act on the embedded root cause\n    }\n    Err(e) => return Err(e),\n    Ok(ready) => use_mount(ready),\n}","preventionTips":["Read the embedded message after the prefix — it names the actual service-side cause","Pre-create the mountpoint directory and ensure it is empty and writable","Verify FUSE prerequisites: kernel module loaded, fusermount3 installed, unprivileged_userfusermount enabled","Keep provider and kernel versions aligned so the launch config deserializes in the service"],"tags":["fuse","mount","process","startup"],"backgroundTag":"upstream-api-error","analyzedSha":"affd8760f44190dbdfbec23403f4c4b642c33112","analyzedAt":"2026-09-09T21:28:12.402Z","contentChangedAt":"2026-09-09T21:28:12.402Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}