[BUG]: Docker@2 - Docker v2 task - Unhandled: Unexpected token .

[jonathan-itpro]

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Task name

Docker@2 - Docker v2 task

Task version

2.263.1

Issue Description

In the previous version (Version: 2.259.0) everything worked fine, however, in our version (Version: 2.263.1) we are seeing this error.

2025-09-29T21:52:31.3432619Z ##[section]Starting: buildAndPush
2025-09-29T21:52:31.3442238Z ==============================================================================
2025-09-29T21:52:31.3442613Z Task : Docker
2025-09-29T21:52:31.3442999Z Description : Build or push Docker images, login or logout, start or stop containers, or run a Docker command
2025-09-29T21:52:31.3443590Z Version : 2.263.1
2025-09-29T21:52:31.3443883Z Author : Microsoft Corporation
2025-09-29T21:52:31.3444187Z Help : https://aka.ms/azpipes-docker-tsg
2025-09-29T21:52:31.3444546Z ==============================================================================
2025-09-29T21:52:31.7810427Z ##[error]Unhandled: Unexpected token .
2025-09-29T21:52:31.7831233Z ##[error]/azp/_work/_tasks/Docker_e28912f1-0114-4464-802a-a3a35437fd16/2.263.1/node_modules/@azure/msal-node/lib/msal-node.cjs:48
tenantProfiles: accountEntity.tenantProfiles?.map((tenantProfile) => {
^

SyntaxError: Unexpected token .
at Module._compile (internal/modules/cjs/loader.js:723:23)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Module.require (internal/modules/cjs/loader.js:692:17)
at require (internal/modules/cjs/helpers.js:25:18)
at Object. (/azp/_work/_tasks/Docker_e28912f1-0114-4464-802a-a3a35437fd16/2.263.1/node_modules/@azure/identity/dist/index.js:5:18)
at Module._compile (internal/modules/cjs/loader.js:778:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
2025-09-29T21:52:31.7903900Z ##[section]Finishing: buildAndPush

Environment type (Please select at least one enviroment where you face this issue)

• Self-Hosted
• Microsoft Hosted
• VMSS Pool
• Container

Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

Azure DevOps Server Version (if applicable)

No response

Operation system

Ubuntu 20.04

Relevant log output

2025-09-30T13:43:19.4836837Z ##[section]Starting: buildAndPush
2025-09-30T13:43:19.4854589Z ==============================================================================
2025-09-30T13:43:19.4855226Z Task         : Docker
2025-09-30T13:43:19.4856015Z Description  : Build or push Docker images, login or logout, start or stop containers, or run a Docker command
2025-09-30T13:43:19.4856466Z Version      : 2.263.1
2025-09-30T13:43:19.4856799Z Author       : Microsoft Corporation
2025-09-30T13:43:19.4857188Z Help         : https://aka.ms/azpipes-docker-tsg
2025-09-30T13:43:19.4857644Z ==============================================================================
2025-09-30T13:43:19.9672907Z ##[error]Unhandled: Unexpected token .
2025-09-30T13:43:19.9691237Z ##[error]/azp/_work/_tasks/Docker_e28912f1-0114-4464-802a-a3a35437fd16/2.263.1/node_modules/@azure/msal-node/lib/msal-node.cjs:48
                tenantProfiles: accountEntity.tenantProfiles?.map((tenantProfile) => {
                                                             ^

SyntaxError: Unexpected token .
    at Module._compile (internal/modules/cjs/loader.js:723:23)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at Object.<anonymous> (/azp/_work/_tasks/Docker_e28912f1-0114-4464-802a-a3a35437fd16/2.263.1/node_modules/@azure/identity/dist/index.js:5:18)
    at Module._compile (internal/modules/cjs/loader.js:778:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
2025-09-30T13:43:19.9697139Z ##[section]Finishing: buildAndPush

Full task logs with system.debug enabled

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Repro steps

[brunobsm88]

Hi, I'm having exactly the same problem. Even older releases have stopped working.

[jonathan-itpro]

normalizede aftr update agent to 4.261.0 version

[ghostbust555]

Our production builds are all down while this is broken. Will be trying moving back to the v1 task to see if that resolves things, but certainly not great to have our build server down. If moving back doesn't fix I will try updating the agent but worry it will break other things.

[yousiftouma]

Same here, can't run Docker v2 task any more. Our agents are also running 4.261.0. I'm not sure I understand what you mean @jonathan-itpro , is it supposed to fixed on agent version 4.261.0 or did that version introduce the bug?

What should we do? Why is the issue closed when there is no clear fix or workaround presented?

[yousiftouma]

For anyone else finding this:
We had this variable set in pipelines:

• name: AGENT_USE_NODE10
  value: "true"

For something wholly unrelated. Removing that seemed to do the trick.

[Sven1310]

We also have the same problem. The problem occured suddenly. Completely unchanged build agent and pipeline. It is currently not possible to publish a new production release for our application. We also do NOT have the above mentioned variable "AGENT_USE_NODE10" in our pipelines :-( So I think this case is not closed really. If anybody has a solution, this would be great!

[cyl1d3]

We have the same problem, broke from one day to another without changing anything on our end.

[Sven1310]

Ok, updating the agent to current version solved the issue. But now I have a mismatch between needed node version and installed node version.

[tj-concentrix]

For anyone else finding this: We had this variable set in pipelines:

• name: AGENT_USE_NODE10
  value: "true"

For something wholly unrelated. Removing that seemed to do the trick.

Thanks, we also had AGENT_USE_NODE10 variable defined, I don't know why it was there but removing it fixed it.

For anyone else experiencing the issue, it looks like the @azure/msal-node library used by this task was recently updated and caused the error. If you don't have the variable defined, there is something else in your pipeline which is causing you to use a rather old Node.js version.

However the library's support policy says that even Node.js 10, as an even-numbered LTS release, should still work, so you may want to file a bug with them (I couldn't find an existing one).