[ https://issues.apache.org/jira/browse/YARN-8706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chandni Singh updated YARN-8706: -------------------------------- Description: {{DockerStopCommand}} adds a grace period of 10 seconds. 10 seconds is also the default grace time use by docker stop [https://docs.docker.com/engine/reference/commandline/stop/] Documentation of the docker stop: {quote}the main process inside the container will receive {{SIGTERM}}, and after a grace period, {{SIGKILL}}. {quote} There is a {{DelayedProcessKiller}} in {{ContainerExcecutor}} which executes for all containers after a delay when {{sleepDelayBeforeSigKill>0}}. By default this is set to {{250 milliseconds}} and so irrespective of the container type, it will always get executed. For a docker container, {{docker stop}} takes care of sending a {{SIGKILL}} after the grace period - when sleepDelayBeforeSigKill > 10 seconds, then there is no point of executing DelayedProcessKiller - when sleepDelayBeforeSigKill < 1 second, then the grace period should be least, which is 1 second, because anyways we are forcing kill after 250 ms was: {{DockerStopCommand}} adds a grace period of 10 seconds. 10 seconds is also the default grace time use by docker stop [https://docs.docker.com/engine/reference/commandline/stop/] Documentation of the docker stop: {quote}the main process inside the container will receive {{SIGTERM}}, and after a grace period, {{SIGKILL}}. {quote} There is a {{DelayedProcessKiller}} in {{ContainerExcecutor}} which executes for all containers after a delay when {{sleepDelayBeforeSigKill>0}}. By default this is set to {{250 milliseconds}} and so irrespective of the container type, it will get always get executed. For a docker container, {{docker stop}} takes care of sending a {{SIGKILL}} after the grace period, so having {{DelayedProcessKiller}} seems redundant. > DelayedProcessKiller is executed for Docker containers even though docker > stop sends a KILL signal after the specified grace period > ----------------------------------------------------------------------------------------------------------------------------------- > > Key: YARN-8706 > URL: https://issues.apache.org/jira/browse/YARN-8706 > Project: Hadoop YARN > Issue Type: Sub-task > Reporter: Chandni Singh > Assignee: Chandni Singh > Priority: Major > Labels: docker > > {{DockerStopCommand}} adds a grace period of 10 seconds. > 10 seconds is also the default grace time use by docker stop > [https://docs.docker.com/engine/reference/commandline/stop/] > Documentation of the docker stop: > {quote}the main process inside the container will receive {{SIGTERM}}, and > after a grace period, {{SIGKILL}}. > {quote} > There is a {{DelayedProcessKiller}} in {{ContainerExcecutor}} which executes > for all containers after a delay when {{sleepDelayBeforeSigKill>0}}. By > default this is set to {{250 milliseconds}} and so irrespective of the > container type, it will always get executed. > > For a docker container, {{docker stop}} takes care of sending a {{SIGKILL}} > after the grace period > - when sleepDelayBeforeSigKill > 10 seconds, then there is no point of > executing DelayedProcessKiller > - when sleepDelayBeforeSigKill < 1 second, then the grace period should be > least, which is 1 second, because anyways we are forcing kill after 250 ms > -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org