Azure Databricks Skill

This skill provides expert guidance for Azure Databricks. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. It combines local quick-reference content with remote documentation fetching capabilities.

How to Use This Skill

IMPORTANT for Agent: Use the Category Index below to locate relevant sections. For categories with line ranges (e.g., L35-L120), use read_file with the specified lines. For categories with file links (e.g., [security.md](security.md)), use read_file on the linked reference file

IMPORTANT for Agent: If metadata.generated_at is more than 3 months old, suggest the user pull the latest version from the repository. If mcp_microsoftdocs tools are not available, suggest the user install it: Installation Guide

This skill requires network access to fetch documentation content:

• Preferred: Use mcp_microsoftdocs:microsoft_docs_fetch with query string from=learn-agent-skill. Returns Markdown.
• Fallback: Use fetch_webpage with query string from=learn-agent-skill&accept=text/markdown. Returns Markdown.

Category Index

Category	Location	Description
Troubleshooting	L37-L179	Diagnosing and fixing Databricks issues: Spark and SQL errors, Lakeflow/Auto Loader and pipelines, connectors/ingestion, model serving, feature store, CLI/IDE, and audit/log-based troubleshooting.
Best Practices	L180-L390	End-to-end Databricks best practices: cost, governance, security, compute, BI, streaming, Lakehouse storage, RAG/GenAI, ML/LLMOps, Lakeflow, connectors, and performance tuning.
Decision Making	decision-making.md	Guides for architectural and cost decisions in Azure Databricks: choosing compute, runtimes, pipelines, AI/ML options, connectors, governance, and planning/migrating workloads and tools.
Architecture & Design Patterns	architecture-patterns.md	Architectural blueprints and patterns for Databricks: DR/HA, networking, storage, Lakehouse/medallion, Lakeflow ETL/CDC, Lakebase, AI agents, Feature Store, MLOps, and AI governance.
Limits & Quotas	limits-quotas.md	Limits, quotas, and constraints for Databricks compute, AI/BI, connectors, Lakeflow, Lakehouse Real-Time, Unity Catalog, Lakebase, model serving, and SQL/notebook behavior.
Security	security.md	Securing Azure Databricks: identity and access control (RBAC/ABAC), Unity Catalog governance, encryption and keys, network/IP controls, OAuth and token auth, compliance profiles, and secure external connections.
Configuration	configuration.md	Configuring and managing Azure Databricks and Unity Catalog: accounts, networking, security, AI/ML, Lakeflow, SQL, storage, connectors, bundles, CLI, observability, and cost/governance settings.
Integrations & Coding Patterns	integrations.md	Patterns and how-tos for integrating Databricks with apps, agents, external data systems, BI tools, and ML/AI workflows, plus detailed APIs, CLIs, connectors, and SQL/PySpark function references.
Deployment	deployment.md	End-to-end deployment of Azure Databricks: workspaces, Unity Catalog, Lakeflow, Lakebase, apps/agents, model & feature serving, CI/CD, IaC (ARM/Bicep/Terraform/Bundles), and networking setup.

Troubleshooting

Topic	URL
Troubleshoot Databricks Agent Evaluation issues	https://learn.microsoft.com/en-us/azure/databricks/agents/agent-evaluation/troubleshooting
Debug custom code agents on Databricks	https://learn.microsoft.com/en-us/azure/databricks/agents/custom-agents/debug-agent
Detect and clean up unused AI Search endpoints	https://learn.microsoft.com/en-us/azure/databricks/ai-search/unused-endpoints
Resolve Databricks classic compute termination error codes	https://learn.microsoft.com/en-us/azure/databricks/compute/troubleshooting/cluster-error-codes
Debug Spark applications using Databricks Spark UI	https://learn.microsoft.com/en-us/azure/databricks/compute/troubleshooting/debugging-spark-ui
Monitor Databricks dashboard usage with audit logs	https://learn.microsoft.com/en-us/azure/databricks/dashboards/monitor-usage
Troubleshoot common Databricks CLI issues	https://learn.microsoft.com/en-us/azure/databricks/dev-tools/cli/troubleshooting
Use Databricks app details for monitoring and troubleshooting	https://learn.microsoft.com/en-us/azure/databricks/dev-tools/databricks-apps/view-app-details
Troubleshoot Databricks Connect for Python issues	https://learn.microsoft.com/en-us/azure/databricks/dev-tools/databricks-connect/python/troubleshooting
Troubleshoot Databricks Connect for Scala issues	https://learn.microsoft.com/en-us/azure/databricks/dev-tools/databricks-connect/scala/troubleshooting
Troubleshoot Databricks Terraform provider issues	https://learn.microsoft.com/en-us/azure/databricks/dev-tools/terraform/troubleshoot
Troubleshoot issues with the Databricks IDE extension	https://learn.microsoft.com/en-us/azure/databricks/dev-tools/vscode-ext/troubleshooting
Handle ARITHMETIC_OVERFLOW errors in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/arithmetic-overflow-error-class
Resolve CAST_INVALID_INPUT errors in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/cast-invalid-input-error-class
Diagnose DC_GA4_RAW_DATA_ERROR in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/dc-ga4-raw-data-error-error-class
Understand DC_SFDC_API_ERROR in Databricks connectors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/dc-sfdc-api-error-error-class
Diagnose DC_SQLSERVER_ERROR in Databricks connectors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/dc-sqlserver-error-error-class
Handle DELTA_ICEBERG_COMPAT_V1_VIOLATION errors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/delta-iceberg-compat-v1-violation-error-class
Resolve DIVIDE_BY_ZERO error in Azure Databricks SQL	https://learn.microsoft.com/en-us/azure/databricks/error-messages/divide-by-zero-error-class
Use Databricks error conditions for handling failures	https://learn.microsoft.com/en-us/azure/databricks/error-messages/error-classes
Troubleshoot EWKB_PARSE_ERROR in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/ewkb-parse-error-error-class
Troubleshoot EWKT_PARSE_ERROR in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/ewkt-parse-error-error-class
Troubleshoot GEOJSON_PARSE_ERROR in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/geojson-parse-error-error-class
Resolve GROUP_BY_AGGREGATE errors in Databricks SQL	https://learn.microsoft.com/en-us/azure/databricks/error-messages/group-by-aggregate-error-class
Handle H3_INVALID_CELL_ID errors in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/h3-invalid-cell-id-error-class
Fix H3_INVALID_GRID_DISTANCE_VALUE errors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/h3-invalid-grid-distance-value-error-class
Fix H3_INVALID_RESOLUTION_VALUE errors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/h3-invalid-resolution-value-error-class
Resolve H3_NOT_ENABLED errors in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/h3-not-enabled-error-class
Handle INSUFFICIENT_TABLE_PROPERTY errors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/insufficient-table-property-error-class
Resolve INVALID_ARRAY_INDEX errors in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/invalid-array-index-error-class
Resolve INVALID_ARRAY_INDEX_IN_ELEMENT_AT errors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/invalid-array-index-in-element-at-error-class
Fix MISSING_AGGREGATION errors in GROUP BY	https://learn.microsoft.com/en-us/azure/databricks/error-messages/missing-aggregation-error-class
Troubleshoot ROW_COLUMN_ACCESS errors in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/row-column-access-error-class
Understand SQLSTATE error codes in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/sqlstates
Resolve TABLE_OR_VIEW_NOT_FOUND errors in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/table-or-view-not-found-error-class
Fix UNRESOLVED_ROUTINE errors in Databricks SQL	https://learn.microsoft.com/en-us/azure/databricks/error-messages/unresolved-routine-error-class
Handle UNSUPPORTED_TABLE_OPERATION errors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/unsupported-table-operation-error-class
Handle UNSUPPORTED_VIEW_OPERATION errors	https://learn.microsoft.com/en-us/azure/databricks/error-messages/unsupported-view-operation-error-class
Troubleshoot WKB_PARSE_ERROR in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/wkb-parse-error-error-class
Troubleshoot WKT_PARSE_ERROR in Databricks	https://learn.microsoft.com/en-us/azure/databricks/error-messages/wkt-parse-error-error-class
Troubleshoot common Genie Agent issues	https://learn.microsoft.com/en-us/azure/databricks/genie-agents/troubleshooting
Auto Loader FAQ and operational guidance	https://learn.microsoft.com/en-us/azure/databricks/ingestion/cloud-object-storage/auto-loader/faq
Monitor and troubleshoot Auto Loader pipelines	https://learn.microsoft.com/en-us/azure/databricks/ingestion/cloud-object-storage/auto-loader/observability
Troubleshoot Databricks Aha! connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/aha-troubleshoot
Troubleshoot Databricks Amplitude connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/amplitude-troubleshoot
Troubleshoot Databricks Anaplan connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/anaplan-troubleshoot
Troubleshoot Anthropic Lakeflow ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/anthropic-troubleshoot
Troubleshoot Anysphere audit logs connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/anysphere-audit-logs-troubleshoot
Troubleshoot Anysphere Organization connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/anysphere-organization-troubleshoot
Troubleshoot Atlassian audit logs connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/atlassian-audit-logs-troubleshoot
Troubleshoot Celigo connector ingestion errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/celigo-troubleshoot
Troubleshoot Databricks Confluence ingestion errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/confluence-troubleshoot
Troubleshoot Dynamics 365 ingestion via Synapse Link	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/d365-troubleshoot
Troubleshoot Glean connector authentication and rate limits	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/glean-troubleshoot
Troubleshoot Gmail connector ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/gmail-troubleshoot
Troubleshoot Databricks Google Ads connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/google-ads-troubleshoot
Troubleshoot GA4 Raw Data connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/google-analytics-troubleshoot
Google Drive connector FAQs and behaviors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/google-drive-faq
Troubleshoot Google Drive ingestion in Lakeflow	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/google-drive-troubleshoot
Troubleshoot Google Search Console connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/google-search-console-troubleshoot
Troubleshoot Google Workspace connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/google-workspace-troubleshoot
Troubleshoot HubSpot connector ingestion problems	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/hubspot-troubleshoot
Troubleshoot Jira ingestion issues in Lakeflow	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/jira-troubleshoot
Troubleshoot managed Kafka connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/kafka-troubleshoot
Troubleshoot LinkedIn Ads connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/linkedin-ads-troubleshoot
Troubleshoot Marketo connector pipeline errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/marketo-troubleshoot
Troubleshoot Meta Ads ingestion connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/meta-ads-troubleshoot
Troubleshoot Monday.com connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/monday-com-troubleshoot
Troubleshoot Databricks MySQL ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/mysql-troubleshoot
Troubleshoot Netskope Logs connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/netskope-logs-troubleshoot
Troubleshoot Notion connector authentication and sync issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/notion-troubleshoot
Troubleshoot OpenAI connector ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/openai-troubleshoot
Troubleshoot Oracle integrated CDC ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/oracle-troubleshoot
Troubleshoot Outlook connector ingestion errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/outlook-troubleshoot
Resolve common Databricks PagerDuty connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/pagerduty-faq
Troubleshoot Databricks PagerDuty connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/pagerduty-troubleshoot
Answer common Databricks Pendo connector questions	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/pendo-faq
Troubleshoot Databricks Pendo connector problems	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/pendo-troubleshoot
Troubleshoot Databricks PostgreSQL ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/postgresql-troubleshoot
Troubleshoot Databricks query-based connectors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/query-based-troubleshoot
Troubleshoot managed RabbitMQ connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/rabbitmq-troubleshoot
FAQ for Databricks Reddit Ads ingestion connector	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/reddit-ads-faq
Troubleshoot Databricks Reddit Ads connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/reddit-ads-troubleshoot
FAQ for Databricks Salesforce ingestion connector	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/salesforce-faq
Troubleshoot Databricks Salesforce ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/salesforce-troubleshoot
Troubleshoot Databricks SendGrid connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/sendgrid-troubleshoot
Troubleshoot Databricks ServiceNow ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/servicenow-troubleshoot
Troubleshoot Salesforce Marketing Cloud connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/sfmc-troubleshoot
Troubleshoot Databricks SharePoint ingestion errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/sharepoint-troubleshoot
Troubleshoot Databricks Smartsheet connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/smartsheet-troubleshoot
Troubleshoot Databricks SQL Server ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/sql-server-troubleshoot
Troubleshoot Databricks Square connector authentication and rate limits	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/square-troubleshoot
Troubleshoot Databricks Strac connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/strac-troubleshoot
Troubleshoot TikTok Ads connector ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/tiktok-ads-troubleshoot
Troubleshoot Databricks managed ingestion pipelines	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/troubleshoot
Resolve UNITY_CATALOG_INITIALIZATION_FAILED in pipelines	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/uc-initialization-troubleshoot
Troubleshoot Veeva Vault connector errors in Lakeflow	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/veeva-vault-troubleshoot
Troubleshoot Verkada connector errors in Lakeflow	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/verkada-troubleshoot
Troubleshoot Wiz Audit Logs connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/wiz-audit-logs-troubleshoot
Troubleshoot Workday HCM connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/workday-hcm-troubleshoot
Troubleshoot Databricks Workday ingestion issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/workday-reports-troubleshoot
Troubleshoot Databricks Workiva connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/workiva-troubleshoot
Troubleshoot Zendesk Support connector issues	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/zendesk-support-troubleshoot
Troubleshoot Databricks Zip connector errors	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/zip-troubleshoot
Troubleshoot Zoho Books connector authentication and limits	https://learn.microsoft.com/en-us/azure/databricks/ingestion/lakeflow-connect/zoho-books-troubleshoot
Handle Zerobus Ingest error codes and failures	https://learn.microsoft.com/en-us/azure/databricks/ingestion/zerobus-errors
Review logging for Databricks init scripts	https://learn.microsoft.com/en-us/azure/databricks/init-scripts/logs
Troubleshoot and repair Lakeflow Jobs failures	https://learn.microsoft.com/en-us/azure/databricks/jobs/repair-job-failures
Monitor and troubleshoot materialized view refreshes	https://learn.microsoft.com/en-us/azure/databricks/ldp/dbsql/materialized-monitor
Resolve high initialization times in pipelines	https://learn.microsoft.com/en-us/azure/databricks/ldp/fix-high-init
Recover Lakeflow pipelines from checkpoint failures	https://learn.microsoft.com/en-us/azure/databricks/ldp/recover-streaming
Migrate and troubleshoot AI Runtime deep learning workloads	https://learn.microsoft.com/en-us/azure/databricks/machine-learning/ai-runtime/guides/
Inspect and debug Databricks Feature Views in Unity Catalog	https://learn.microsoft.com/en-us/azure/databricks/machine-learning/feature-store/explore-feature-views
Troubleshoot Databricks Feature Store and limits	https://learn.microsoft.com/en-us/azure/databricks/machine-learning/feature-store/troubleshooting-and-limitations
Diagnose and fix Databricks model serving issues	https://learn.microsoft.com/en-us/azure/databricks/machine-learning/model-serving/model-serving-debug
Use Genie Code to diagnose Databricks model serving	https://learn.microsoft.com/en-us/azure/databricks/machine-learning/model-serving/model-serving-genie-code
Debug and analyze GenAI apps using MLflow traces	https://learn.microsoft.com/en-us/azure/databricks/mlflow3/genai/tracing/observe-with-traces/
Debug Python code in Databricks notebooks	https://learn.microsoft.com/en-us/azure/databricks/notebooks/debugger
Use Insights to detect and resolve Lakebase issues	https://learn.microsoft.com/en-us/azure/databricks/oltp/projects/observability-ai-insights
Diagnose and fix Lakebase Postgres issues with Genie	https://learn.microsoft.com/en-us/azure/databricks/oltp/projects/observability-genie
Troubleshoot common OpenSharing data access errors	https://learn.microsoft.com/en-us/azure/databricks/opensharing/troubleshooting
Diagnose failing Spark jobs and removed executors	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/failing-spark-jobs
Use the Databricks jobs timeline to debug Spark	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/jobs-timeline
Diagnose long Spark jobs using Databricks UI	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/long-spark-stage
Investigate high I/O Spark stages in Databricks	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/long-spark-stage-io
Debug skew and spill in long Spark stages	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/long-spark-stage-page
Debug slow Spark stages with low I/O in Databricks	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/slow-spark-stage-low-io
Identify expensive reads in Spark DAG on Databricks	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/spark-dag-expensive-read
Diagnose gaps between Spark jobs in Databricks	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/spark-job-gaps
Diagnose and fix Spark memory issues on Databricks	https://learn.microsoft.com/en-us/azure/databricks/optimizations/spark-ui-guide/spark-memory-issues
Troubleshoot Databricks Partner Connect issues	https://learn.microsoft.com/en-us/azure/databricks/partner-connect/troubleshoot
Troubleshoot Databricks publishing and connections to Power BI	https://learn.microsoft.com/en-us/azure/databricks/partners/bi/power-bi/troubleshooting
Troubleshoot Azure Databricks Git folder errors	https://learn.microsoft.com/en-us/azure/databricks/repos/errors-troubleshooting
Handle Databricks SQL FETCH cursor errors	https://learn.microsoft.com/en-us/azure/databricks/sql/language-manual/control-flow/fetch-stmt
Diagnose Data