style95 commented on issue #4430: Update docker client version to 18.06.3 URL: https://github.com/apache/incubator-openwhisk/pull/4430#issuecomment-485671534 It seems from the Docker 18, it relies on kernel cgroup capability to limit memory swapness. Only after enabling it, I could successfully run memory exceeding test case in `ActionLimitTests`. Reference: https://docs.docker.com/install/linux/linux-postinstall/#your-kernel-does-not-support-cgroup-swap-limit-capabilities
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