[service] Error in conan create: PREV for <reference> is None

[danimtb]

In some jobs, the conan create command fails at some point when installing dependencies with the following message:

PREV for <reference> is None

For example, this is the full message:

AssertionError: PREV for nasm/2.15.05:0a420ff5c47119e668867cdb51baff0eca1fdb68 is None: {"recipe": {"revision": "3b0fc0a593bbfd22ed8e922fd0a9e303", "remote": "conan-center", "properties": {}, "checksums": {"conan_export.tgz": {"md5": "d74e7aee83295b4efa262a86357996de", "sha1": "2ad66c8a8bebe58c81a2e40a162e508db109c527"}, "conanmanifest.txt": {"md5": "888beba3abf6092477903c358a359ed6", "sha1": "55a224eeaf5e5e5ff916ce2c6c060df9f9791b1c"}, "conanfile.py": {"md5": "e21c0ebc27f5837a9c651fb9809fab83", "sha1": "650ce5ae4d43f1ee219cae209fafbe279895c36f"}}}, "packages": {"0a420ff5c47119e668867cdb51baff0eca1fdb68": {"revision": null, "recipe_revision": null, "remote": null, "properties": {}, "checksums": {}}}}

ERROR: PREV for nasm/2.15.05:0a420ff5c47119e668867cdb51baff0eca1fdb68 is None: {"recipe": {"revision": "3b0fc0a593bbfd22ed8e922fd0a9e303", "remote": "conan-center", "properties": {}, "checksums": {"conan_export.tgz": {"md5": "d74e7aee83295b4efa262a86357996de", "sha1": "2ad66c8a8bebe58c81a2e40a162e508db109c527"}, "conanmanifest.txt": {"md5": "888beba3abf6092477903c358a359ed6", "sha1": "55a224eeaf5e5e5ff916ce2c6c060df9f9791b1c"}, "conanfile.py": {"md5": "e21c0ebc27f5837a9c651fb9809fab83", "sha1": "650ce5ae4d43f1ee219cae209fafbe279895c36f"}}}, "packages": {"0a420ff5c47119e668867cdb51baff0eca1fdb68": {"revision": null, "recipe_revision": null, "remote": null, "properties": {}, "checksums": {}}}}

Pull request affected at some point:

• glib: add version 2.67.4 #4589 (comment)
• add qt cmake macros #4577 (comment)
• Qt 6.0.1 #4412 (comment)
• openssl: provide official variables in cmake_find_package #4597 (comment)

We thought it was due to a corrupted Conan client installation at first and we fixed this issue in the affected machine. However, the issue came back and raised in different machines. We think now that it could be some case of concurrency and probably a bug in the CI pipeline, but we need to investigate this thoroughly.

[ericLemanissier]

could it be linked to conan-io/conan#6379 or conan-io/conan#8172 ?

Originally posted by @ericLemanissier in #4577 (comment)

[SSE4]

might be related to conan-io/conan#8517

[danimtb]

might be related to conan-io/conan#8517

Yes, Javier is investigating this on the Conan side.

could it be linked to conan-io/conan#6379 or conan-io/conan#8172 ?

Originally posted by @ericLemanissier in #4577 (comment)

Not sure if related, but thanks for pointing it out.

[jgsogo]

I'm proposing this change (conan-io/conan#8519). I think we are writing that metadata.json without package-revision at some point, but I can't figure out when... if we merge the into 1.32.x we can try it in ConanCenter soon.

[jgsogo]

We keep trying to figure out what is originating these errors. conan-io/conan#8519 is a good place to follow it. They are not deterministic, so the best we can do is to trigger again those PRs and eventually they (or other PRs) will fail with the same error.

We are adding more logs to the CI that hopefully will help us to figure out what is happening there.

[danimtb]

closing this issue as this has not happened again and is an old issue report. Thanks!