[Devel] Re: c/r:read pipe error when restart

[kadyz]

I have found the reason, it's the same like
http://openvz.org/pipermail/devel/2011-January/026408.html

<http://openvz.org/pipermail/devel/2011-January/026408.html>hope Oren or the
other developers can fix it as soon as possible.

bad news is, the restart is still failed, is it possible that the version I
download can not work indeed, or can anyone tell me where I'm wrong.

2011/2/22 kadyz <allen303allen at gmail.com>

> hi all:
>    I have a very simple script test for c/r,but I'm unable to get a
> restart to complete. I get both linux-cr and user-cr code from the git
> a few weeks ago, and i think they are the newest. I'm using RHEL5.4,
> x86-64. Here are my steps:
>
>    # mkdir -p /cgroup
>    # mount -t cgroup -o freezer cgroup /cgroup
>    # mkdir /cgroup/1
>
>    # cat > foo.sh << EOF
>    #!/bin/sh
>    echo $$ > /cgroup/1/tasks
>    while true; do
>    echo "this is a test."
>    sleep 1s
>    done
>    EOF
>
>    # nsexec -tgcmpiUP pid foo.sh
>    about to clone with 38020000
>    this is a test.
>    this is a test.
>    ...
>
>    /* the following steps go on in another terminal */
>    # cat pid
>    29750
>    # echo FROZEN > /cgroup/1/freezer.state
>    # cat /cgroup/1/tasks
>    29750
>    29772
>    # checkpoint 29750 -l clog -o image.out
>    # kill -9 29750
>    # echo THAWED > /cgroup/1/freezer.state
>
>    (It seems ok for now, but when I try restart, the problem comes.)
>
>    # restart -l rlog -i image.out
>    read pipe: Bad file descriptor
>    Killed
>
>    (I have tried lots of times, and the rlog is usually empty, but I
> also see msg once in it)
>    # cat rlog
>    [err -512][pos 0][E @ ckpt_read_obj_type:426]Expecting to read type 1
>
>    (when I add -d -v, it comes like this)
>    # restart -d -v -i image.out
>    <31720>number of tasks: 2
>    <31720>number of vpids: 0
>    <31720>total tasks (including ghosts): 3
>    <31720>pid 99: inherit sid 0
>    <31720>pid 99: creator set to 1
>    <31720>pid 301: orphan session 1
>    <31720>pid 301: creator set to 302
>    <31720>====== TASKS
>    <31720> [0] pid 1 ppid 0 sid 0 creator 0 placeholder 302
>    <31720> [1] pid 99 ppid 1 sid 0 creator 1 prev 302
>    <31720> [2] pid 301 ppid 1 sid 1 creator 302     G
>    <31720> [3] pid 302 ppid 1 sid 1 creator 1 next 99      D
>    <31720>............
>    <31720>task[0].vidx = 1 (depth 0, rpid 1)
>    <31720>task[1].vidx = 2 (depth 0, rpid 99)
>    <31720>subtree (existing pidns)
>    <31720>fork child vpid 1 flags 0x1
>    <31721>====== PIDS ARRAY
>    <31721>[0] pid 1 ppid 301 sid 301 pgid 301
>    <31721>[1] pid 99 ppid 301 sid 301 pgid 301
>    <31720>task 1 forking with flags 11 numpids 1
>    <31721>............
>    <31720>task 1 pid[0]=0
>    read pipe: Bad file descriptor
>    Killed
>
>
>    (I found a similar discussion from
> http://openvz.org/pipermail/devel/2010-July/025274.html , but it
> didn't work for me. Because the code I use has fixed them all.)
>
>
>    Look forward and very appreciate for your helps!
>
>    Thank you!
>
>    Kadyz
>
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