{"record":{"id":"5dcc31c4aeda6e97","repo":"vxcontrol/pentagi","slug":"failed-to-put-terminal-log-write-file-cmd-w","errorCode":null,"errorMessage":"failed to put terminal log (write file cmd): %w","messagePattern":"failed to put terminal log \\(write file cmd\\): %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"backend/pkg/tools/terminal.go","lineNumber":441,"sourceCode":"\n\treturn buffer.String(), nil\n}\n\nfunc (t *terminal) WriteFile(ctx context.Context, flowID int64, content string, path string) (string, error) {\n\tif path == \"\" {\n\t\treturn \"\", fmt.Errorf(\"path is required and cannot be empty\")\n\t}\n\n\tif err := t.writeFileToContainer(ctx, flowID, path, content); err != nil {\n\t\treturn \"\", err\n\t}\n\n\t// Format success message with styling\n\tsuccessMsg := fmt.Sprintf(\"File successfully saved to %s\", path)\n\tstyledMsg := fmt.Sprintf(\"%s%s%s%s\", ansiColorSystemMsg, successMsg, ansiColorReset, ansiLineTerminator)\n\t_, err := t.tlp.PutMsg(ctx, database.TermlogTypeStdin, styledMsg, t.containerID, t.taskID, t.subtaskID)\n\tif err != nil {\n\t\treturn \"\", fmt.Errorf(\"failed to put terminal log (write file cmd): %w\", err)\n\t}\n\n\treturn fmt.Sprintf(\"Successfully wrote %d bytes to %s\", len(content), path), nil\n}\n\n// writeFileToContainer copies content into the flow's container at path,\n// overwriting it. It performs no terminal-log writes; WriteFile and EditFile\n// each log their own, differently-worded, success message.\nfunc (t *terminal) writeFileToContainer(ctx context.Context, flowID int64, path, content string) error {\n\tcontainerName := PrimaryTerminalName(t.tenantPrefix, flowID)\n\n\tisRunning, err := t.dockerClient.IsContainerRunning(ctx, t.containerLID)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"container runtime check failed: %w\", err)\n\t}\n\tif !isRunning {\n\t\treturn fmt.Errorf(\"target container is not operational\")\n\t}","sourceCodeStart":423,"sourceCodeEnd":459,"githubUrl":"https://github.com/vxcontrol/pentagi/blob/ea665308baaff015b226f308438a68d929d0f29b/backend/pkg/tools/terminal.go#L423-L459","documentation":"After writeFileToContainer succeeds, WriteFile emits an ANSI-styled 'File successfully saved' entry to the flow's terminal log via tlp.PutMsg (TermlogTypeStdin). If that logging write fails — DB down, context canceled, terminal-log storage error — the whole operation is reported as failed with this wrapper even though the file was already written to the container.","triggerScenarios":"The file content was successfully put into the container, but the subsequent PutMsg to the termlog store returned an error: PostgreSQL unreachable/rolled back, ctx deadline exceeded during the log insert, or the terminal-log record for the container/task/subtask is in a bad state.","commonSituations":"Database failover or connection-pool exhaustion during heavy flow activity; request context canceled by an upstream HTTP/GraphQL timeout right after the Docker write completed; migration/schema drift on the termlog table.","solutions":["Check database connectivity and logs (PostgreSQL up, pool not exhausted) — this is a logging-side failure, not a Docker one","Retry the WriteFile call; the file write is idempotent (same content overwrites)","Decouple logging from the result path: log the PutMsg error (non-fatal) instead of failing a write that already succeeded","Verify ctx deadlines upstream aren't expiring between the Docker put and the log insert"],"exampleFix":"// before\n_, err := t.tlp.PutMsg(ctx, database.TermlogTypeStdin, styledMsg, t.containerID, t.taskID, t.subtaskID)\nif err != nil {\n    return \"\", fmt.Errorf(\"failed to put terminal log (write file cmd): %w\", err)\n}\n// after\nif _, err := t.tlp.PutMsg(ctx, database.TermlogTypeStdin, styledMsg, t.containerID, t.taskID, t.subtaskID); err != nil {\n    logger.WarnContext(ctx, \"termlog write failed for file save\", \"path\", path, \"err\", err)\n}","handlingStrategy":"try-catch","validationCode":"// Pre-call: ensure the termlog store is reachable\nif err := db.PingContext(ctx); err != nil {\n    return fmt.Errorf(\"terminal log store unavailable: %w\", err)\n}","typeGuard":null,"tryCatchPattern":"if _, err := tlp.PutMsg(ctx, database.TermlogTypeStdin, styledMsg, containerID, taskID, subtaskID); err != nil {\n    logger.WarnContext(ctx, \"termlog write failed; file already saved\", \"path\", path, \"err\", err)\n    // do not fail the whole write for a logging error\n}","preventionTips":["Treat terminal-log persistence as best-effort, not as the write's success criterion","Give the log insert a short independent timeout so ctx cancellation upstream doesn't poison it","Monitor DB pool saturation during heavy flow activity","Add a fallback buffer/retry queue for failed termlog writes"],"tags":["logging","database","terminal"],"backgroundTag":"terminal-log-write-failed","analyzedSha":"ea665308baaff015b226f308438a68d929d0f29b","analyzedAt":"2026-09-01T14:16:31.421Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}