[Cosmos] Add compute error fault injection for address refresh

[Abhijeet Mohanty (jeet1995)]

Summary

• Add COMPUTE_SERVICE_UNAVAILABLE (503/0) and COMPUTE_INTERNAL_SERVER_ERROR (500/102) fault-injection errors, including METADATA_REQUEST_ADDRESS_REFRESH support.
• Preserve existing server-error mappings and restrictions on other metadata operations.
• Extend the metadata builder matrix, exact status/substatus unit coverage, and PPCB address-refresh failover/recovery/failback coverage.

[azure-pipelines]

Azure Pipelines:
Successfully started running 2 pipeline(s).
33 pipeline(s) were filtered out due to trigger conditions.
There may be pipelines that require an authorized user to comment /azp run to run.

[Abhijeet Mohanty (jeet1995)]

/azp run java - cosmos - tests

[azure-pipelines]

Azure Pipelines:
Successfully started running 1 pipeline(s).

[azure-pipelines]

Azure Pipelines:
Successfully started running 2 pipeline(s).
33 pipeline(s) were filtered out due to trigger conditions.
There may be pipelines that require an authorized user to comment /azp run to run.

[Copilot]

🟡 Changes recommended

The new unit test constructs RxDocumentServiceRequest using a non-existent create(...) overload, which will fail compilation.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

This PR extends the Cosmos fault-injection test infrastructure to model additional “compute” server failures during address refresh, and broadens both unit and E2E coverage to validate the new error mappings and PPCB failover/recovery behavior.

Changes:

• Added new fault-injection server error types COMPUTE_SERVICE_UNAVAILABLE (503/0) and COMPUTE_INTERNAL_SERVER_ERROR (500/102), including metadata address-refresh allowance.
• Updated fault-injection server error construction to emit the expected status/substatus/header mapping for the new compute errors.
• Expanded unit/E2E tests to cover the new error types and verify they are surfaced in diagnostics and PPCB behavior.

File summaries

File	Description
sdk/cosmos/azure-cosmos-tests/src/test/java/com/azure/cosmos/PerPartitionCircuitBreakerE2ETests.java	Parameterizes the PPCB address-refresh recovery test to run against response delay and the new compute error types; asserts diagnostics capture the injected failure.
sdk/cosmos/azure-cosmos-tests/src/test/java/com/azure/cosmos/faultinjection/FaultInjectionUnitTest.java	Extends metadata-operation validation and adds a data-driven unit test to verify status/substatus/header mappings.
sdk/cosmos/azure-cosmos-test/src/main/java/com/azure/cosmos/test/implementation/faultinjection/FaultInjectionServerErrorResultInternal.java	Implements injected exception/header mapping for the new compute error types.
sdk/cosmos/azure-cosmos-test/src/main/java/com/azure/cosmos/test/faultinjection/FaultInjectionServerErrorType.java	Adds new enum values for compute-originated server errors.
sdk/cosmos/azure-cosmos-test/src/main/java/com/azure/cosmos/test/faultinjection/FaultInjectionRuleBuilder.java	Allows compute error types specifically for METADATA_REQUEST_ADDRESS_REFRESH metadata fault-injection rules.
sdk/cosmos/azure-cosmos-test/CHANGELOG.md	Documents the added compute fault-injection error types and address-refresh support.

Review details

• Files reviewed: 6/6 changed files
• Comments generated: 1
• Review effort level: Lite

---

💡 Add a code-review agent skill for context-aware, tailored reviews. Learn more in the docs.