Troubleshooting¶

Quick reference for Java Azure Functions operational workflows.

Topic/Command Groups¶

flowchart TD
    A[Symptom] --> B[Hypothesis]
    B --> C[Evidence]
    C --> D[Fix]
    D --> E[Validation]

Quick checks¶

1. Verify app settings with az functionapp config appsettings list --name $APP_NAME --resource-group $RG.
2. Confirm runtime with az functionapp config show --name $APP_NAME --resource-group $RG --query linuxFxVersion --output tsv.
3. Stream logs with az functionapp log tail --name $APP_NAME --resource-group $RG.
4. Rebuild and redeploy using mvn clean package and mvn azure-functions:deploy.

Typical Java issues¶

• Missing FUNCTIONS_WORKER_RUNTIME=java.
• Incompatible JDK level between local build and cloud runtime.
• Missing azure-functions-java-library dependency.
• Overly small heap settings causing OOM under load.

See Also¶

• Java Runtime
• Annotation Programming Model
• Operations Overview

Sources¶

• Azure Functions Java developer guide (Microsoft Learn)
• Azure Functions CLI reference (Microsoft Learn)