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https://issues.apache.org/jira/browse/YARN-3080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14342760#comment-14342760
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Beckham007 commented on YARN-3080:
----------------------------------
Sorry for mistaking.
The pidfile has two functions. 1. When NM restarting, it use the pid to check
whether the container finished. 2. As [~chenchun] said, "As for
signalContainer, we can use docker kill --signal="SIGNAL" containerId instead."
> The DockerContainerExecutor could not write the right pid to container pidFile
> ------------------------------------------------------------------------------
>
> Key: YARN-3080
> URL: https://issues.apache.org/jira/browse/YARN-3080
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 2.6.0
> Reporter: Beckham007
> Assignee: Abin Shahab
> Attachments: YARN-3080.patch, YARN-3080.patch, YARN-3080.patch,
> YARN-3080.patch
>
>
> The docker_container_executor_session.sh is like this:
> {quote}
> #!/usr/bin/env bash
> echo `/usr/bin/docker inspect --format {{.State.Pid}}
> container_1421723685222_0008_01_000002` >
> /data/nm_restart/hadoop-2.4.1/data/yarn/local/nmPrivate/application_1421723685222_0008/container_1421723685222_0008_01_000002/container_1421723685222_0008_01_000002.pid.tmp
> /bin/mv -f
> /data/nm_restart/hadoop-2.4.1/data/yarn/local/nmPrivate/application_1421723685222_0008/container_1421723685222_0008_01_000002/container_1421723685222_0008_01_000002.pid.tmp
>
> /data/nm_restart/hadoop-2.4.1/data/yarn/local/nmPrivate/application_1421723685222_0008/container_1421723685222_0008_01_000002/container_1421723685222_0008_01_000002.pid
> /usr/bin/docker run --rm --name container_1421723685222_0008_01_000002 -e
> GAIA_HOST_IP=c162 -e GAIA_API_SERVER=10.6.207.226:8080 -e
> GAIA_CLUSTER_ID=shpc-nm_restart -e GAIA_QUEUE=root.tdwadmin -e
> GAIA_APP_NAME=test_nm_docker -e GAIA_INSTANCE_ID=1 -e
> GAIA_CONTAINER_ID=container_1421723685222_0008_01_000002 --memory=32M
> --cpu-shares=1024 -v
> /data/nm_restart/hadoop-2.4.1/data/yarn/container-logs/application_1421723685222_0008/container_1421723685222_0008_01_000002:/data/nm_restart/hadoop-2.4.1/data/yarn/container-logs/application_1421723685222_0008/container_1421723685222_0008_01_000002
> -v
> /data/nm_restart/hadoop-2.4.1/data/yarn/local/usercache/tdwadmin/appcache/application_1421723685222_0008/container_1421723685222_0008_01_000002:/data/nm_restart/hadoop-2.4.1/data/yarn/local/usercache/tdwadmin/appcache/application_1421723685222_0008/container_1421723685222_0008_01_000002
> -P -e A=B --privileged=true docker.oa.com:8080/library/centos7 bash
> "/data/nm_restart/hadoop-2.4.1/data/yarn/local/usercache/tdwadmin/appcache/application_1421723685222_0008/container_1421723685222_0008_01_000002/launch_container.sh"
> {quote}
> The DockerContainerExecutor use docker inspect before docker run, so the
> docker inspect couldn't get the right pid for the docker, signalContainer()
> and nm restart would fail.
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