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Troubleshoot pipeline failure to start

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TFS 2018

If your pipeline queues but never starts, check the following items.

Parallel job limits - no available agents or you have hit your free limits

If you're currently running other pipelines, you might not have any remaining parallel jobs, or you might have hit your free limits.

Demands that don't match the capabilities of an agent

If your pipeline has demands that don't meet the capabilities of any of your agents, your pipeline won't start. If only some of your agents have the desired capabilities and they're currently running other pipelines, your pipeline will be stalled until one of those agents becomes available.

To check the capabilities and demands specified for your agents and pipelines, see Capabilities.

TFS agent connection issues

Config fails while testing agent connection (on-premises TFS only)

Testing agent connection.
VS30063: You are not authorized to access http://<SERVER>:8080/tfs

If the above error is received while configuring the agent, log on to your TFS machine. Start the Internet Information Services (IIS) manager. Make sure Anonymous Authentication is enabled.

is TFS anonymous authentication enabled

Agent lost communication

This issue is characterized by the error message:

The job has been abandoned because agent did not renew the lock. Ensure agent is running, not sleeping, and has not lost communication with the service.

This error might indicate the agent lost communication with the server for a span of several minutes. Check the following to rule out network or other interruptions on the agent machine:

  • Verify automatic updates are turned off. A machine reboot from an update will cause a build or release to fail with the above error. Apply updates in a controlled fashion to avoid this type of interruption. Before rebooting the agent machine, mark the agent as disabled in the pool administration page and let any running build finish.
  • Verify the sleep settings are turned off.
  • If the agent is running on a virtual machine, avoid any live migration or other VM maintenance operation that might severely impact the health of the machine for multiple minutes.
  • If the agent is running on a virtual machine, the same operating-system-update recommendations and sleep-setting recommendations apply to the host machine. And also any other maintenance operations that several impact the host machine.
  • Performance monitor logging or other health metric logging can help to correlate this type of error to constrained resource availability on the agent machine (disk, memory, page file, processor, network).
  • Another way to correlate the error with network problems is to ping a server indefinitely and dump the output to a file, along with timestamps. Use a healthy interval, for example 20 or 30 seconds. If you're using Azure Pipelines, then you would want to ping an internet domain, for example bing.com. If you're using an on-premises TFS server, then you would want to ping a server on the same network.
  • Verify the network throughput of the machine is adequate. You can perform an online speed test to check the throughput.
  • If you use a proxy, verify the agent is configured to use your proxy. Refer to the agent deployment topic.

TFS Job Agent not started

This might be characterized by a message in the web console "Waiting for an agent to be requested". Verify the TFSJobAgent (display name: Visual Studio Team Foundation Background Job Agent) Windows service is started.

Misconfigured notification URL (1.x agent version)

This might be characterized by a message in the web console "Waiting for console output from an agent", and the process eventually times out.

A mismatching notification URL might cause the worker to process to fail to connect to the server. See Team Foundation Administration Console, Application Tier. The 1.x agent listens to the message queue using the URL that it was configured with. However, when a job message is pulled from the queue, the worker process uses the notification URL to communicate back to the server.

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