The hosted runner: GitHub Actions 908 lost communication with the server. Anything in your workflow that terminates the runner process, starves it for CPU/Memory, or blocks its network access can cause this error.

Encountered a fatal error while running "/opt/hostedtoolcache/CodeQL/2.20.0/x64/codeql/codeql database finalize --finalize-dataset --threads=4 --ram=14567 /home/runner/work/_temp/codeql_databases/cpp". Exit code was 2 and error was: A fatal error occurred: Dataset import for /home/runner/work/_temp/codeql_databases/cpp/db-cpp failed with code 2. Context: A fatal error occurred: Could not write a relation to a file /home/runner/work/_temp/codeql_databases/cpp/db-cpp/default/var_decls.rel (eventual cause: IOException "No space left on device"). See the logs for more details. For more information, see https://gh.io/troubleshooting-code-scanning/out-of-disk-or-memory

ubuntu-latest pipelines will use ubuntu-24.04 soon. For more details, see https://github.com/actions/runner-images/issues/10636