Hi James,

    Please, find attached the crash log file. I could not access the link 
https://issues.apache.org/browse/TS.

Thanks
Gandhimathi

________________________________________
From: James Peach [[email protected]]
Sent: Tuesday, August 30, 2016 1:27 PM
To: Users
Subject: Re: Slow Request Error

> On Aug 30, 2016, at 11:09 AM, Velusamy, Gandhimathi <[email protected]> 
> wrote:
>
> Hi James,
>
>   Thanks for your reply.
>
> Actually the Traffic server is getting crashed when I am trying to download 
> the files from client from a python code using urllib.urlretrieve().
>
> I am having two setups (two different testbeds). It is working fine on one 
> set up in which the links carry 1Gb bandwidth but it is not working on the 
> set up in which the links carry 10 Mb bandwidth.
>
> as soon as it downloaded from first server, it is getting crashed.

Ah, this is a bug then. Can you please file a Jira issue at 
https://issues.apache.org/browse/TS, including the crash log if you can.

>
>
> but when I download using wget from command prompt one by one, it is working 
> with slower link set up.
>
> So I tried to debug using the slow.log.threshold.
>
> traffic_server: Segmentation fault (Address not mapped to object [0x88])
> traffic_server - STACK TRACE:
> bin/traffic_server(_Z19crash_logger_invokeiP9siginfo_tPv+0x8e)[0x4ad02e]
> /lib/x86_64-linux-gnu/libpthread.so.0(+0x10330)[0x7fce5f6f5330]
> bin/traffic_server(_ZNK22ProxyClientTransaction9get_netvcEv+0xc)[0x4f122c]
> bin/traffic_server(_ZN6HttpSM12update_statsEv+0x322)[0x5a1282]
> bin/traffic_server(_ZN6HttpSM9kill_thisEv+0x380)[0x5b3e60]
> bin/traffic_server(_ZN6HttpSM12main_handlerEiPv+0x108)[0x5b49f8]
> bin/traffic_server(_ZN10HttpTunnel12main_handlerEiPv+0x19d)[0x5f125d]
> bin/traffic_server(_Z15write_to_net_ioP10NetHandlerP18UnixNetVConnectionP7EThread+0x11f0)[0x749c70]
> bin/traffic_server(_ZN10NetHandler12mainNetEventEiP5Event+0x29c)[0x73b6dc]
> bin/traffic_server(_ZN7EThread7executeEv+0x9c2)[0x76d442]
> bin/traffic_server[0x76c04a]
> /lib/x86_64-linux-gnu/libpthread.so.0(+0x8184)[0x7fce5f6ed184]
> /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fce5e9f637d]
> gvelus01@ts:/usr/local$
>
>
> Thanks
> Gandhimathi
>
> ________________________________________
> From: James Peach [[email protected]]
> Sent: Monday, August 29, 2016 10:15 PM
> To: [email protected]
> Subject: Re: Slow Request Error
>
>> On Aug 29, 2016, at 5:12 PM, Velusamy, Gandhimathi <[email protected]> 
>> wrote:
>>
>> Hi,
>>
>>  I am working with balancer plugins and I am getting the following error in 
>> my Diags.log.
>
> This is not an error. You have set proxy.config.http.slow.log.threshold, so 
> Traffic Server is logging information about requests that took longer than 
> that threshold.
>
> https://docs.trafficserver.apache.org/en/latest/admin-guide/files/records.config.en.html#proxy-config-http-slow-log-threshold
>
>> The bandwidth on the links is 10 Mbits/sec.
>>
>> As I am working on balancer plugin I turned caching off.
>>
>> I am trying to download pdf files of different sizes from client.
>>
>> My Diags.log shows:
>> Aug 29 19:36:50.096] Server {0x7fdffcf15780} ERROR: <HttpSM.cc:7015 
>> (update_stats)> [8] Slow Request: client_ip: 172.16.4.2:46306 url: 
>> http://172.16.1.2/book_14mb.pdf status: 200 unique id:  redirection_tries: 0 
>> bytes: 14243401 fd: 0 client state: 0 server state: 9 ua_begin: 0.000 
>> ua_first_read: 0.000 ua_read_header_done: 0.000 cache_open_read_begin: 
>> -0.001 cache_open_read_end: -0.001 dns_lookup_begin: 0.000 dns_lookup_end: 
>> 0.000 server_connect: 0.000 server_first_read: 0.007 
>> server_read_header_done: 0.007 server_close: 11.263 ua_close: 11.263 
>> sm_finish: 11.263 plugin_active: -0.001 plugin_total: -0.001
>
> Basically all the time in this transaction is between server_read_header_done 
> and server_close, so it took a long time for the origin server to deliver the 
> object contents.
>
>> [Aug 29 19:42:03.295] Server {0x7fdff9f70700} ERROR: <HttpSM.cc:7015 
>> (update_stats)> [9] Slow Request: client_ip: 172.16.4.2:46340 url: 
>> http://172.16.2.2/book_14mb.pdf status: 200 unique id:  redirection_tries: 0 
>> bytes: 14243401 fd: 0 client state: 0 server state: 9 ua_begin: 0.000 
>> ua_first_read: 0.000 ua_read_header_done: 0.000 cache_open_read_begin: 
>> -0.001 cache_open_read_end: -0.001 dns_lookup_begin: 0.000 dns_lookup_end: 
>> 0.000 server_connect: 0.000 server_first_read: 0.007 
>> server_read_header_done: 0.007 server_close: 11.088 ua_close: 11.088 
>> sm_finish: 11.088 plugin_active: -0.001 plugin_total: -0.001
>>
>> Even for small download also getting the same error:
>> Aug 29 20:06:26.853] Server {0x7fdff9e6f700} ERROR: <HttpSM.cc:7015 
>> (update_stats)> [10] Slow Request: client_ip: 172.16.4.2:46489 url: 
>> http://172.16.3.2/book_3mb.pdf status: 200 unique id:  redirection_tries: 0 
>> bytes: 3129946 fd: 0 client state: 0 server state: 9 ua_begin: 0.000 
>> ua_first_read: 0.000 ua_read_header_done: 0.000 cache_open_read_begin: 
>> -0.001 cache_open_read_end: -0.001 dns_lookup_begin: 0.000 dns_lookup_end: 
>> 0.000 server_connect: 0.000 server_first_read: 0.001 
>> server_read_header_done: 0.001 server_close: 1.719 ua_close: 1.719 
>> sm_finish: 1.719 plugin_active: -0.001 plugin_total: -0.001
>>
>>
>> May I please, know how to get rid of this error.
>>
>>
>> Thanks
>> Gandhimathi
>

Attachment: crash-2016-08-30-144224.log
Description: crash-2016-08-30-144224.log

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