Open Stack

Can you use the transaction ID in the object server log that is in error to
correlate with the proxy server logs to see how the proxy server responded
for that REST API request?


On Fri, Jul 12, 2013 at 12:46 PM, Samuel Merritt <sam at swiftstack.com> wrote:

> On 7/12/13 12:34 AM, Jonathan Lu wrote:
>
>> Hi, all stackers,
>>      I test the cluster and get such error msg:
>>          Jul 12 11:23:57 ubuntu-12 proxy-server ERROR with Object server
>> 192.168.1.161:60
>>
>>          00/xvdb1 re: Trying to get final status of PUT to
>> /v1/AUTH_test/test_8/e9a243cb0
>>
>>          462406a9ca10b590ed42a5f: Timeout (10s) (txn:
>> txe58fdd4aaaf8402a86814b67272a**1d1a)
>>
>>           (client_ip: 192.168.1.151)
>>
>>
>>      It seems that the proxy is waiting for the request of getting the
>> final status of object and failed. Can anyone give me some hint that why
>> this happened?
>>
>
> That error indicates that the proxy server sent an entire HTTP PUT
> request, including the whole body, to one of the object servers, but that
> object server failed to respond with headers in time (where "in time" here
> looks like "10 seconds").
>
> That can happen for many reasons, including heavy IO load on the object
> server, and since you're benchmarking the cluster, you may well have driven
> the load up high.
>
> Do note that the proxy will still return a successful response to the
> client if a quorum (2 out of 3) of the writes succeeded, so seeing this
> error in the logs does not necessarily indicate that clients are seeing
> errors.
>
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