{"record":{"id":"6a29f55bab20510d","repo":"vxcontrol/pentagi","slug":"failed-to-inspect-exec-process-w","errorCode":null,"errorMessage":"failed to inspect exec process: %w","messagePattern":"failed to inspect exec process: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"backend/pkg/tools/terminal.go","lineNumber":311,"sourceCode":"\n\t\t// Wait for the copy goroutine to finish\n\t\t<-errChan\n\n\t\tsuggestedTimeout := max(int(timeout.Seconds())-10, 10)\n\t\treturn \"\", fmt.Errorf(\n\t\t\t\"command execution timeout (%v). Partial output: %s. \"+\n\t\t\t\t\"HINT: If this is an interactive command (shell/REPL/listener), use detach=true. \"+\n\t\t\t\t\"For long batch commands, wrap with shell timeout utility: 'timeout %d <command>' to ensure clean completion\",\n\t\t\tctx.Err(),\n\t\t\ttruncateString(dst.String(), 500),\n\t\t\tsuggestedTimeout,\n\t\t)\n\t}\n\n\t// wait for the exec process to finish\n\t_, err = t.dockerClient.ContainerExecInspect(ctx, id)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"failed to inspect exec process: %w\", err)\n\t}\n\n\tresults := dst.String()\n\t// Style system output with color coding\n\tstyledOutput := fmt.Sprintf(\"%s%s%s%s\", ansiColorSystemMsg, results, ansiColorReset, ansiLineTerminator)\n\t_, err = t.tlp.PutMsg(ctx, database.TermlogTypeStdout, styledOutput, t.containerID, t.taskID, t.subtaskID)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"failed to put terminal log (stdout): %w\", err)\n\t}\n\n\tif results == \"\" {\n\t\tresults = \"Command completed successfully with exit code 0. No output produced (silent success)\"\n\t}\n\n\treturn results, nil\n}\n\nfunc (t *terminal) ReadFile(ctx context.Context, flowID int64, path string) (string, error) {","sourceCodeStart":293,"sourceCodeEnd":329,"githubUrl":"https://github.com/vxcontrol/pentagi/blob/ea665308baaff015b226f308438a68d929d0f29b/backend/pkg/tools/terminal.go#L293-L329","documentation":"After streaming output, getExecResult calls ContainerExecInspect to wait for the exec process to finish and learn its state. This error wraps a failure of that inspect call, meaning the library could not confirm the exec's completion status.","triggerScenarios":"ContainerExecInspect(ctx, id) returns an error: the exec instance no longer exists (already removed/reaped), the container stopped and was removed, or the Docker daemon became unreachable between attach and inspect.","commonSituations":"Docker daemon restart or connection drop mid-exec; container OOM-killed or stopped while the command ran; very short-lived execs that finish and get reaped before inspect; Docker API version incompatibilities.","solutions":["Verify the container is still running (IsContainerRunning) before/after execution","Check daemon connectivity (docker info) and retry the command","Inspect container events/logs to see if it was killed during execution (docker events, docker logs)","Ensure Docker client library API version matches the daemon (DOCKER_API_VERSION)"],"exampleFix":"// before\nout, err := term.ExecCommand(ctx, flowID, cmd, false) // daemon unreachable at inspect\n// after\nif err := dockerPing(ctx); err != nil {\n    return fmt.Errorf(\"docker daemon unavailable: %w\", err)\n}\nout, err := term.ExecCommand(ctx, flowID, cmd, false)","handlingStrategy":"retry","validationCode":"if ok, err := docker.IsContainerRunning(ctx, containerLID); err != nil || !ok {\n    return fmt.Errorf(\"container unavailable before exec: %v\", err)\n}","typeGuard":null,"tryCatchPattern":"out, err := term.ExecCommand(ctx, flowID, cmd, false)\nif err != nil && strings.Contains(err.Error(), \"failed to inspect exec process\") {\n    // daemon hiccup or exec reaped; verify daemon then retry\n    if err := dockerPing(ctx); err == nil {\n        out, err = term.ExecCommand(ctx, flowID, cmd, false)\n    }\n}","preventionTips":["Health-check the Docker daemon before long tool runs","Avoid container stop/remove races while execs are pending","Pin DOCKER_API_VERSION to avoid client/daemon mismatches","Monitor docker events for unexpected container deaths"],"tags":["docker","exec","inspect","network"],"backgroundTag":"docker-exec-inspect-failed","analyzedSha":"ea665308baaff015b226f308438a68d929d0f29b","analyzedAt":"2026-09-01T14:16:31.421Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}