Investigating the Test Failure

Oct 13, 2025 by pynkocean.com 12 views

Introduction

The TestRestoreCheckpointing test in the ccl/backupccl repository has failed on release-24.2. This test is crucial for ensuring the proper functioning of the backup and restore mechanisms in CockroachDB. In this article, we will delve into the details of the test failure, analyze the error message, and provide a step-by-step guide to investigate and potentially resolve the issue.

Error Message Analysis

The error message indicates that the TestRestoreCheckpointing test has failed with a duration of 17.61 seconds. The test logs are captured in the outputs.zip/logTestRestoreCheckpointing4188343069 file, which can be accessed using the -show-logs flag. The error message highlights a discrepancy between the expected and actual values, specifically:

Error Trace: github.com/cockroachdb/cockroach/pkg/ccl/backupccl/backup_test.go:1412
Error: Not equal: expected: 3, actual: 5
Test: TestRestoreCheckpointing

This error message suggests that there is a mismatch between the expected and actual number of checkpoints or restore operations. We will investigate this further in the next section.

Investigating the Test Failure

To investigate the test failure, we need to analyze the test logs and understand the context in which the error occurred. The test logs are captured in the outputs.zip/logTestRestoreCheckpointing4188343069 file, which can be accessed using the -show-logs flag.

Analyzing the Test Logs

The test logs provide valuable information about the test execution, including the test name, duration, and any errors that occurred. In this case, the test logs indicate that the TestRestoreCheckpointing test has failed with a duration of 17.61 seconds.

=== RUN   TestRestoreCheckpointing
    test_log_scope.go:165: test logs captured to: outputs.zip/logTestRestoreCheckpointing4188343069
    test_log_scope.go:76: use -show-logs to present logs inline
    test_server_shim.go:152: automatically injected an external process virtual cluster under test; see comment at top of test_server_shim.go for details.
    backup_test.go:1412: 
        	Error Trace:	github.com/cockroachdb/cockroach/pkg/ccl/backupccl/backup_test.go:1412
        	Error:      	Not equal: 
        	            	expected: 3
        	            	actual  : 5
        	Test:       	TestRestoreCheckpointing
    testutils.go:296: no Invalid Descriptors
    panic.go:626: -- test log scope end --
test logs left over in: outputs.zip/logTestRestoreCheckpointing4188343069
--- FAIL: TestRestoreCheckpointing (17.61s)

Understanding the Error Message

The error message indicates that there is a mismatch between the expected and actual number of checkpoints or restore operations. Specifically, the expected value is 3, while the actual value is 5. This discrepancy suggests that there may be an issue with the test logic or the implementation of the backup and restore mechanisms.

Identifying Potential Causes

Based on the error message and the test logs, we can identify several potential causes for the test failure:

Incorrect test logic: The test logic may be incorrect, leading to an incorrect expected value.
Implementation issue: There may be an issue with the implementation of the backup and restore mechanisms, causing the actual value to differ from the expected value.
External factors: External factors, such as network issues or resource constraints, may be affecting the test execution and causing the error.

Next Steps

To resolve the test failure, we need to investigate the potential causes and gather more information about the test execution. We can do this by:

Analyzing the test logs: We can analyze the test logs to understand the context in which the error occurred and identify any potential issues.
Reviewing the test code: We can review the test code to ensure that the test logic is correct and that there are no implementation issues.
Running additional tests: We can run additional tests to verify that the issue is not specific to the TestRestoreCheckpointing test and to gather more information about the test execution.

Conclusion

In this article, we investigated the failure of the TestRestoreCheckpointing test in the ccl/backupccl repository. We analyzed the error message, understood the context in which the error occurred, and identified potential causes for the test failure. We also outlined the next steps to resolve the test failure, including analyzing the test logs, reviewing the test code, and running additional tests. By following these steps, we can ensure that the TestRestoreCheckpointing test is passing and that the backup and restore mechanisms in CockroachDB are functioning correctly.

Additional Resources

For more information about investigating Go test failures, please refer to the following resources:

Related Issues

This issue is related to the following Jira issues:

CRDB-48482

CC

This issue has been CC'd to the following teams:

@cockroachdb/disaster-recovery
Q&A: Investigating the Failure of TestRestoreCheckpointing in ccl/backupccl ====================================================================================

Introduction

In our previous article, we investigated the failure of the TestRestoreCheckpointing test in the ccl/backupccl repository. We analyzed the error message, understood the context in which the error occurred, and identified potential causes for the test failure. In this article, we will provide a Q&A section to help answer common questions related to investigating Go test failures.

Q: What is the purpose of the `TestRestoreCheckpointing` test?

A: The TestRestoreCheckpointing test is designed to verify the proper functioning of the backup and restore mechanisms in CockroachDB. It checks that the expected number of checkpoints or restore operations is correct.

Q: What is the error message indicating?

A: The error message indicates that there is a mismatch between the expected and actual number of checkpoints or restore operations. Specifically, the expected value is 3, while the actual value is 5.

Q: What are the potential causes of the test failure?

A: The potential causes of the test failure include:

Incorrect test logic: The test logic may be incorrect, leading to an incorrect expected value.
Implementation issue: There may be an issue with the implementation of the backup and restore mechanisms, causing the actual value to differ from the expected value.
External factors: External factors, such as network issues or resource constraints, may be affecting the test execution and causing the error.

Q: How can I analyze the test logs to understand the context in which the error occurred?

A: To analyze the test logs, you can use the -show-logs flag to present the logs inline. You can also review the test logs to identify any potential issues.

Q: How can I review the test code to ensure that the test logic is correct and that there are no implementation issues?

A: To review the test code, you can check the backup_test.go file in the ccl/backupccl repository. You can also use a code review tool to identify any potential issues.

Q: How can I run additional tests to verify that the issue is not specific to the `TestRestoreCheckpointing` test and to gather more information about the test execution?

A: To run additional tests, you can use the go test command with the -v flag to enable verbose mode. You can also use a testing framework, such as Go Test, to run multiple tests and gather more information about the test execution.

Q: What are some common mistakes to avoid when investigating Go test failures?

A: Some common mistakes to avoid when investigating Go test failures include:

Not analyzing the test logs: Failing to analyze the test logs can make it difficult to understand the context in which the error occurred.
Not reviewing the test code: Failing to review the test code can lead to incorrect assumptions about the test logic.
Not running additional tests: Failing to run additional tests can make it difficult to verify that the issue is not specific to the TestRestoreCheckpointing test.