Re: RGW flush_read_list error

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To the client they were showing up as a 500 error. Ty, do you know of any
client-side issues that could have come up during the test run? And there
was only a single GET happening at a time, right?




On 10/11/17, 9:27 AM, "ceph-users on behalf of Casey Bodley"
<ceph-users-bounces@xxxxxxxxxxxxxx on behalf of cbodley@xxxxxxxxxx> wrote:

>Hi Travis,
>
>This is reporting an error when sending data back to the client.
>Generally it means that the client timed out and closed the connection.
>Are you also seeing failures on the client side?
>
>Casey
>
>
>On 10/10/2017 06:45 PM, Travis Nielsen wrote:
>> In Luminous 12.2.1, when running a GET on a large (1GB file) repeatedly
>> for an hour from RGW, the following error was hit intermittently a
>>number
>> of times. The first error was hit after 45 minutes and then the error
>> happened frequently for the remainder of the test.
>>
>> ERROR: flush_read_list(): d->client_cb->handle_data() returned -5
>>
>> Here is some more context from the rgw log around one of the failures.
>>
>> 2017-10-10 18:20:32.321681 I | rgw: 2017-10-10 18:20:32.321643
>> 7f8929f41700 1 civetweb: 0x55bd25899000: 10.32.0.1 - -
>> [10/Oct/2017:18:19:07 +0000] "GET /bucket100/testfile.tst HTTP/1.1" 1 0
>>-
>> aws-sdk-java/1.9.0 Linux/4.4.0-93-generic
>> OpenJDK_64-Bit_Server_VM/25.131-b11/1.8.0_131
>> 2017-10-10 18:20:32.383855 I | rgw: 2017-10-10 18:20:32.383786
>> 7f8924736700 1 ====== starting new request req=0x7f892472f140 =====
>> 2017-10-10 18:20:46.605668 I | rgw: 2017-10-10 18:20:46.605576
>> 7f894af83700 0 ERROR: flush_read_list(): d->client_cb->handle_data()
>> returned -5
>> 2017-10-10 18:20:46.605934 I | rgw: 2017-10-10 18:20:46.605914
>> 7f894af83700 1 ====== req done req=0x7f894af7c140 op status=-5
>> http_status=200 ======
>> 2017-10-10 18:20:46.606249 I | rgw: 2017-10-10 18:20:46.606225
>> 7f8924736700 0 ERROR: flush_read_list(): d->client_cb->handle_data()
>> returned -5
>>
>> I don't see anything else standing out in the log. The object store was
>> configured with an erasure-coded data pool with k=2 and m=1.
>>
>> There are a number of threads around this, but I don't see a resolution.
>> Is there a tracking issue for this?
>> 
>>https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Flists.cep
>>h.com%2Fpipermail%2Fceph-users-ceph.com%2F2016-February%2F007756.ht&data=
>>02%7C01%7CTravis.Nielsen%40quantum.com%7C5ba068e75938455da6a408d510c50ddd
>>%7C322a135f14fb4d72aede122272134ae0%7C1%7C0%7C636433360880521631&sdata=Wb
>>EdpMEB%2BvjZS%2BxclppC3%2BHALu6iayzwjTQeFK3qMp8%3D&reserved=0
>> ml
>> 
>>https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.spin
>>ics.net%2Flists%2Fceph-users%2Fmsg16117.html&data=02%7C01%7CTravis.Nielse
>>n%40quantum.com%7C5ba068e75938455da6a408d510c50ddd%7C322a135f14fb4d72aede
>>122272134ae0%7C1%7C0%7C636433360880521631&sdata=5PSDwmEnZB7g9atCeRlZvTPUX
>>wHB3c1bFjiDt7VfkKI%3D&reserved=0
>> 
>>https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.spin
>>ics.net%2Flists%2Fceph-devel%2Fmsg37657.html&data=02%7C01%7CTravis.Nielse
>>n%40quantum.com%7C5ba068e75938455da6a408d510c50ddd%7C322a135f14fb4d72aede
>>122272134ae0%7C1%7C0%7C636433360880521631&sdata=4oEXugLrXjmIPRnz4LAiavbMF
>>kgUnEj5jBw%2F%2Bk9BYJE%3D&reserved=0
>>
>>
>> Here's our tracking Rook issue.
>> 
>>https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.c
>>om%2Frook%2Frook%2Fissues%2F1067&data=02%7C01%7CTravis.Nielsen%40quantum.
>>com%7C5ba068e75938455da6a408d510c50ddd%7C322a135f14fb4d72aede122272134ae0
>>%7C1%7C0%7C636433360880521631&sdata=pYi3%2FZupNoy7Act1bQomEee6seO%2BKDt%2
>>BzkgzmcYeJV4%3D&reserved=0
>>
>>
>> Thanks,
>> Travis
>>

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