The blog of Richard Fennell

This is the blog of Richard Fennell, I am a Microsoft MVP for Developer Technologies and the CTO of Black Marble Ltd a Microsoft Gold Partner based in the North of England. Black Marble specialises in Integration projects using the Azure/Microsoft stack. I blog mostly on the subject of DevOps using Azure DevOps and GitHub.
Richard Fennell (headshot)

Why are my Azure DevOps Pipeline cache hits missing

I have blogged in the past about Caching NVD Vulnerability Dependency data on hosted Azure DevOps Pipeline agents. Using the cache is a great way to speed up slow builds. However, today I was surprised to find I was getting cache misses on my pipeline, even though I was sure the cache should have been hit. There are rules over how the cache is used: The cache is specific to a pipeline definition, so there is no sharing of the cache between pipeline definitions The cache is only created if the pipeline is successful (running the post run tasks) The cache only lasts 7 days but what I had not realised was the cache is also specific to the branch in a not so obvious way....

June 5, 2024 · 2 min · Richard Fennell

Still time to register for the Global DevOps Experience

There is still time to register for the free Global DevOps Experience which is being run on the 15th of June at many venues around the world, including Black Marble’s offices. The Global DevOps Experience is a day full of learning and fun, as we immerse you in the world of DevOps and AI. You will learn about the latest trends and technologies, and work in a team to solve challenging exercises based around a realistic business scenario....

June 3, 2024 · 1 min · Richard Fennell

Azure DevOps pipeline jobs failing to start

The Issue Whilst migrating some Azure DevOps classic pipelines to templated multi-stage YAML, I hit a problem that a job running on a self-hosted agent would not start. The YAML stage, which required approval, would be queued and approved, but the agent would just sit there with the message Starting job but would never start. The strange thing was even though the job was not started, the pipeline instantly showed as failed with no error message....

May 29, 2024 · 1 min · Richard Fennell

Failing client connections with SQL OPENJSON Incorrect Syntax error after upgrading Identity Server 6 to 7

The Issue Whilst updating a client’s Duende Identity Server from versions 6 to 7, we experienced a problem. We followed the upgrade steps and all was working fine against our development instance i.e. the Identity Server Db was upgraded to the current schema and we could login from our test MVC web client without issues. The problem occured when we started to test using our UAT (a production replica) DB. On loading the Identity Server, it did the expected EF migrations and appeared to start, but when a client tried to connect we got an exception in the Identity Server logs in the form...

May 29, 2024 · 1 min · Richard Fennell

Fix for SonarQube recoverable indexing failures error

The Issue Within one of our Azure DevOps builds we today started to see the following error when running the SonarQube analysis step: ##[error][SQ] Task failed with status FAILED, Error message: Unrecoverable indexing failures: 1 errors among 1 requests. Check Elasticsearch logs for further details. Nothing obvious pointed to why this should have started to occur, the SonarQube logs showed nothing more than a longer version of the same message....

May 16, 2024 · 1 min · Richard Fennell