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From "Qian Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MESOS-9231) `docker inspect` may return an incomplete result to Docker executor due to a race condition
Date Sat, 22 Sep 2018 14:06:00 GMT

    [ https://issues.apache.org/jira/browse/MESOS-9231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16624690#comment-16624690
] 

Qian Zhang commented on MESOS-9231:
-----------------------------------

I tried a newer version of Docker (17.12.1-ce), unfortunately it also has this issue, the
incomplete result returned by `docker inspect` is:
{code:java}
[
    {
        "CreatedAt": "0001-01-01T00:00:00Z",
        "Driver": "rexray",
        "Labels": null,
        "Mountpoint": "/",
        "Name": "",
        "Options": {},
        "Scope": "global",
        "Status": {
            "availabilityZone": "",
            "fields": null,
            "iops": 0,
            "name": "",
            "server": "vfs",
            "service": "vfs",
            "size": 0,
            "type": ""
        }
    }
]
{code}

> `docker inspect` may return an incomplete result to Docker executor due to a race condition
> -------------------------------------------------------------------------------------------
>
>                 Key: MESOS-9231
>                 URL: https://issues.apache.org/jira/browse/MESOS-9231
>             Project: Mesos
>          Issue Type: Bug
>    Affects Versions: 1.4.2, 1.5.1, 1.6.1
>            Reporter: Qian Zhang
>            Assignee: Qian Zhang
>            Priority: Major
>
> In the Docker container (`src/docker/executor`), we call `docker inspect` right after
`docker run` ([https://github.com/apache/mesos/blob/1.6.0/src/docker/executor.cpp#L230:L242),] there
is a small chance for `docker inspect` to return an incomplete result which does not contain
the Docker container ID, so we will see an error like below:
> {code:java}
> E0830 00:09:37.303499 2428 executor.cpp:385] Failed to inspect container 'mesos-eaa4f455-0a2c-47ff-bf98-8bd0ad243740':
Unable to create container: Unable to find Id in container
> {code}
> If that happens, Docker executor will not send `TASK_RUNNING` status update, so the task
will be stuck at `TASK_STARTING`.



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