[ec2-beta] hung processes

[Anna Hentzel]

On Wed, Feb 25, 2009 at 2:03 PM, Eric Hammond <ehammond at thinksome.com> wrote:
> Anna:
>
> Are you snapshotting the EBS volumes?
>

I'm not snapshotting yet.

> Does your snapshot process freeze the file system (e.g., xfs_freeze)?
>
> If so, it's possible that the snapshot process failed and left the file
> system frozen which would cause some commands to hang, especially if
> your current working directory might be on that file system.
>
> If this fits with your experience, try a command like
>  xfs_freeze -u /mountpoint
> or the equivalent for your file system.

I tried this anyway, and it didn't seem to affect anything.

>
> Also note that you generally don't want to include the EBS volume file
> systems when rebundling to a new AMI.  Use the --exclude option to
> exclude the mount point.

Ah, thanks for this. For some reason I hadn't realized the bundles
were including the EBS volumes.

-Anna

>
> --
> Eric Hammond
> ehammond at thinksome.com
>
>
>
> Anna Hentzel wrote:
>> I'm running django, lighttpd, and postgis/postgres.
>>
>> The postgres database is on two EBS volumes, mounted raid 0.
>>
>> I tried to cluster a large table last night, which I think might have
>> been when this problem started.
>>
>> -Anna
>>
>> On Wed, Feb 25, 2009 at 1:46 PM, Eric Hammond <ehammond at thinksome.com> wrote:
>>> Anna:
>>>
>>> Can you provide more background on what you are doing on the instance?
>>>
>>> What kinds of software are you running?
>>>
>>> Are you using EBS (Elastic Block Store) or any other persistent storage
>>> mechanism?
>>>
>>> --
>>> Eric Hammond
>>> ehammond at thinksome.com
>>>
>>>
>>>
>>> Anna Hentzel wrote:
>>>> Hi,
>>>>
>>>> I don't know if this is related to the ubuntu beta or not, but I'm
>>>> getting a lot of hung processes that can't be killed even with -9.
>>>>
>>>> These commands hang:
>>>> ps -ef
>>>> sudo lsof -i tcp:3033
>>>> strace -p 7679
>>>>
>>>> Also, once I started getting the hung processes, all attempts to
>>>> upload bundles are failing. Anyone else see anything like that?
>>>>
>>>> Thanks
>>>> Anna
>>>>
>>
>