The hosted runner: GitHub Actions 43 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.

buildx failed with: ERROR: failed to solve: ResourceExhausted: mount callback failed on /tmp/containerd-mount2908330309: mount callback failed on /tmp/containerd-mount3469273748: failed to write compressed diff: failed to create diff tar stream: failed to copy: write /var/lib/buildkit/runc-overlayfs/content/ingest/002ad0b7187eece0380ee0509a6359406f18c1db3f90fc5bec2e2b035d6442ec/data: no space left on device

Unable to process command 'error' successfully.

No space left on device : '/home/runner/runners/2.321.0/_diag/pages/a2f993e4-b72a-4cdd-a0c9-0c8a40cd3345_ca395085-040a-526b-2ce8-bdc85f692774_1.log'

Unable to process file command 'step_summary' successfully.

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