'az login' hangs in linux server: msal_extensions.cache_lock: Process 505865 failed to create lock file

[violascarlett]

Related command

Describe the bug
'az login' command hangs after user authentication . This happens executing from user accounts except root user.

azure cli 2.38.0 is installed. I tried reinstalling the same version, but didn't help.

Not even working after clearing /home/(username)/.azure directory, where token information and cache saved.

I tried 'az login --debug' command. It is stuck after a message "msal_extensions.cache_lock: Process 505865 failed to create lock file"

Expected behavior
complete the authentication and return token information and login details.

Environment summary
CLI version (az --version : 2.38.0) / OS : RHEL 7 / Shell Type : bash

Additional context
The terminal remains stuck after authentication. But if I quit the session by clicking ctrl+z after some couple of minutes and try $az account show, it displays the token information.

[yonzhan]

Thank you for opening this issue, we will look into it.

[jiasli]

I can't repro this issue with a clean CentOS 7 container:

docker run -it --rm centos:7

echo -e "[azure-cli]
name=Azure CLI
baseurl=https://packages.microsoft.com/yumrepos/azure-cli
enabled=1
gpgcheck=1
gpgkey=https://packages.microsoft.com/keys/microsoft.asc" | tee /etc/yum.repos.d/azure-cli.repo

yum install azure-cli

az login

In your output, it looks like msal_extensions reached these lines in CrossPlatLock._try_to_create_lock_file: https://github.com/AzureAD/microsoft-authentication-extensions-for-python/blob/69eef72b0e7a540ae00abb6a65e749cfce4d532a/msal_extensions/cache_lock.py#L49-L51

CrossPlatLock._try_to_create_lock_file is called by CrossPlatLock.__enter__: https://github.com/AzureAD/microsoft-authentication-extensions-for-python/blob/69eef72b0e7a540ae00abb6a65e749cfce4d532a/msal_extensions/cache_lock.py#L57

CrossPlatLock.__enter__ is only called once by PersistedTokenCache.modify: https://github.com/AzureAD/microsoft-authentication-extensions-for-python/blob/d0696aeb6f65168b1e0d405cd871b80bb101cd76/msal_extensions/token_cache.py#L63

Could you try to clear ~/.azure (/home/username/.azure), instead of /home/.azure?

If that doesn't work, any chance you are running multiple Azure CLI instances concurrently?

cc @rayluo

[violascarlett]

@jiasli
Tried cleaning /home/(username)/.azure directory but no changes.

could you be more specific about azure CLI instances? Do you mean containers?

FYI We are running azure CLI commands from different user accounts concurrently on a single server.