Symptoms

Running the CLI command dotnet sitecore cloud environment log download to retrieve a log file of about 4 GB may consume several gigabytes of RAM and end with the error message:

Cannot write more bytes to the buffer than the configured maximum buffer size: 2147483647.

Actions

To obtain large log files, use the xmcloud-monitoring-api endpoint instead of the CLI:

1. Acquire a valid JWT token for the target XM Cloud environment.
2. Execute an HTTP GET request to the following URL, replacing the placeholders with the actual data:
   

   https://xmcloud-monitoring-api.sitecorecloud.io/api/logs/v2/[environment-id]/[log-file-name]

3. Pass the token in the Authorization header. For example:
   

   >curl -o mylog.txt \
     -H "Authorization: Bearer <JWT-token>" \
     https://xmcloud-monitoring-api.sitecorecloud.io/api/logs/v2/[environment-id]/[log-file-name]

Log filename can be obtained using "log list" subcommand.
After the download finishes, the log file can be processed locally.

Note: Feature request XS-10119 has been logged to address this limitation in the CLI. For details on tracking the future status of this feature request, refer to KB0853187.