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Failed to send, wrong host address or cannot reach address due to network issues
The issue arises from DNS resolution failures to the Application Insights ingestion endpoint, compounded by local telemetry storage reaching its maximum capacity. To remediate this, the following actions are recommended:
1. Verify outbound connectivity and DNS resolution to the Application Insights endpoint to ensure reliable communication.
2. Adjust the agent configuration to increase the setting, thereby preventing telemetry loss during connectivity interruptions.
3. Upgrade to the latest Application Insights SDK/agent, as version 3.0.2 is deprecated and may lack support for current endpoints and reliability improvements.
Application Insights OpenTelemetry observability overview - Azure Monitor | Microsoft Learn
Azure Monitor endpoint access and firewall configuration - Azure Monitor | Microsoft Learn