Investigate the npgsql artifacts

Oct 13, 2025 by talynt.org 93 views

Introduction

Roachtest is a comprehensive testing framework for CockroachDB, a distributed relational database. It provides a wide range of tests to ensure the stability and reliability of the database. However, in this article, we will focus on a specific issue where the npgsql test has failed. We will investigate the cause of the failure, analyze the test results, and provide recommendations for further investigation.

Test Results

The npgsql test failed with the following message:

(orm_helpers.go:224).summarizeFailed: 
Tests run on Cockroach v25.1.1-dev-51f8c75bda532de0ce947043498649e8a741fe4a
Tests run against npgsql v7.0.2
3316 Total Tests Run
2679 tests passed
637 tests failed
271 tests skipped
2 tests ignored
0 tests passed unexpectedly
1 test failed unexpectedly
0 tests expected failed but skipped
0 tests expected failed but not run
---
--- FAIL: Npgsql.Tests.CommandTests(NonMultiplexing).Cancel -  (unexpected)
For a full summary look at the npgsql artifacts 
An updated blocklist (npgsqlBlocklist) is available in the artifacts' npgsql log
test artifacts and logs in: /artifacts/npgsql/run_1

Test Parameters

The test was run with the following parameters:

arch=amd64
cloud=gce
coverageBuild=false
cpu=4
encrypted=false
fs=ext4
localSSD=true
metamorphicLeases=epoch
runtimeAssertionsBuild=false
ssd=0

Analysis

The test failed with 637 tests failed, 271 tests skipped, and 2 tests ignored. The failure message indicates that the test Npgsql.Tests.CommandTests(NonMultiplexing).Cancel failed unexpectedly. The full summary of the test results is available in the npgsql artifacts.

Recommendations

Investigate the npgsql artifacts: The npgsql artifacts contain a full summary of the test results, including the failed tests and the updated blocklist. Investigating these artifacts will provide more information about the cause of the failure.
Check the npgsql version: The test was run against npgsql v7.0.2. Checking the npgsql version and ensuring that it is up-to-date may resolve the issue.
Verify the CockroachDB version: The test was run on CockroachDB v25.1.1-dev-51f8c75bda532de0ce947043498649e8a741fe4a. Verifying the CockroachDB version and ensuring that it is up-to-date may resolve the issue.
Check the test parameters: The test parameters were set to arch=amd64, cloud=gce, coverageBuild=false, cpu=4, encrypted=false, fs=ext4, localSSD=true, metamorphicLeases=epoch, runtimeAssertionsBuild=false, and ssd=0. Verifying these parameters and ensuring that they are correct may resolve the issue.

Same Failure on Other Branches

The same failure has been observed on other branches, including:

#142456: roachtest: npgsql failed [nil pointer dereference] [B-runtime-assertions-enabled C-test-failure O-roachtest O-robot T-sql-foundations branch-master release-blocker]
#142455: roachtest: npgsql failed [flaky test] [C-test-failure O-roachtest O-robot T-sql-foundations branch-release-23.2.21-rc]

Conclusion

The npgsql test failed with 637 tests failed, 271 tests skipped, and 2 tests ignored. The failure message indicates that the test Npgsql.Tests.CommandTests(NonMultiplexing).Cancel failed unexpectedly. Investigating the npgsql artifacts, checking the npgsql version, verifying the CockroachDB version, and checking the test parameters may resolve the issue. The same failure has been observed on other branches, indicating that it may be a more widespread issue.

Additional Resources

Jira Issue

Q: What is Roachtest?

A: Roachtest is a comprehensive testing framework for CockroachDB, a distributed relational database. It provides a wide range of tests to ensure the stability and reliability of the database.

Q: What is npgsql?

A: npgsql is a PostgreSQL driver for .NET. It allows .NET applications to connect to PostgreSQL databases.

Q: What is the purpose of the npgsql test in Roachtest?

A: The npgsql test in Roachtest is designed to ensure that the npgsql driver is working correctly with CockroachDB. It tests various scenarios, such as connecting to the database, executing queries, and handling errors.

Q: What are the possible causes of the npgsql test failure?

A: There are several possible causes of the npgsql test failure, including:

Incorrect npgsql version: The npgsql version may be outdated or not compatible with the CockroachDB version.
Incorrect CockroachDB version: The CockroachDB version may be outdated or not compatible with the npgsql version.
Test parameters: The test parameters may be incorrect or not set properly.
nil pointer dereference: A nil pointer dereference may occur due to a bug in the npgsql driver or the CockroachDB code.
Flaky test: The test may be flaky due to a bug in the npgsql driver or the CockroachDB code.

Q: How can I investigate the npgsql test failure?

A: To investigate the npgsql test failure, you can:

Check the npgsql artifacts: The npgsql artifacts contain a full summary of the test results, including the failed tests and the updated blocklist.
Check the npgsql version: Ensure that the npgsql version is up-to-date and compatible with the CockroachDB version.
Check the CockroachDB version: Ensure that the CockroachDB version is up-to-date and compatible with the npgsql version.
Verify the test parameters: Ensure that the test parameters are correct and set properly.
Check for nil pointer dereferences: Check the npgsql driver and the CockroachDB code for nil pointer dereferences.

Q: How can I resolve the npgsql test failure?

A: To resolve the npgsql test failure, you can:

Update the npgsql version: Update the npgsql version to the latest version that is compatible with the CockroachDB version.
Update the CockroachDB version: Update the CockroachDB version to the latest version that is compatible with the npgsql version.
Verify the test parameters: Verify that the test parameters are correct and set properly.
Fix nil pointer dereferences: Fix any nil pointer dereferences in the npgsql driver or the CockroachDB code.

Q: What are the next steps after resolving the npgsql test failure?

A: After resolving the npgsql test failure, you can:

Re-run the npgsql test: Re-run the npgsql test to ensure that the failure is resolved.
Verify the test results: Verify that the test results are correct and that the npgsql driver is working correctly with CockroachDB.
Update the documentation: Update the documentation to reflect the changes made to resolve the npgsql test failure.

Q: Who can I contact for further assistance?

A: You can contact the CockroachDB team for further assistance. They can provide additional guidance and support to help resolve the npgsql test failure.