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Wheel packaging (bdist_wheel) calls Python's tempfile.mkdtemp() which defaults to /tmp inside the container. The container's /tmp is backed by docker's overlay on /var, which is only ~1 GB free on CI runners. This causes OSError: [Errno 28] No space left on device when building the Python wheel. The repo is already mounted at /ort (host: /local/mnt, ~20 GB free). Set TMPDIR/TEMP/TMP inside DockerBuildAndTestTask to /ort/build/_docker_tmp and create that directory on the host before the container runs, so all temp churn lands on the roomy volume instead of /var.
huaychou
requested review from
qti-ashwshan,
qti-chuteng,
qti-jkilpatrick,
qti-kromero,
qti-yuduo,
tirupath-qti and
yath1
as code owners
August 24, 2026 11:08
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