[jira] [Comment Edited] (TS-3611) Segmentation fault: Address not mapped to object

["Nikolai Gorchilov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-3611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14549933#comment-14549933 ] 

Nikolai Gorchilov edited comment on TS-3611 at 5/20/15 4:24 AM:
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Unfortunately all of our production servers run on the same binary build with interim caching enabled.

We're aware that the interim storage will dissapear in v6 and we're planning to migrate to bcache later this year. In relation to that - are there any whitepapers/case studies regarding an optimal setup of bcache with ATS - like SSD to rotational disk size ratios, recommended bcache mode of operation, fine-tunings, etc. I couldn't find any relevant information.


was (Author: ngorchilov):
Unfortunately all of our productions servers run on the same binary build with interim caching enabled.

We're aware that the interim storage will dissapear in v6 and we're planning to migrate to bcache later this year. In relation to that - are there any whitepapers/case studies regarding an optimal setup of bcache with ATS - like SSD to rotational disk size ratios, recommended bcache mode of operation, fine-tunings, etc. I couldn't find any relevant information.

> Segmentation fault: Address not mapped to object
> ------------------------------------------------
>
>                 Key: TS-3611
>                 URL: https://issues.apache.org/jira/browse/TS-3611
>             Project: Traffic Server
>          Issue Type: Bug
>    Affects Versions: 5.3.0
>            Reporter: Nikolai Gorchilov
>              Labels: crash
>             Fix For: 6.0.0
>
>
> Experienced the following crash while running ATS 5.3.0 on custom Linux distro:
> {noformat}
> traffic_server: Segmentation fault (Address not mapped to object [0x10])
> traffic_server - STACK TRACE: 
> /z/bin/traffic_server(crash_logger_invoke(int, siginfo_t*, void*)+0x8e)[0x4ad5fe]
> /lib64/libpthread.so.0(+0x105f0)[0x2b63a09b55f0]
> /z/bin/traffic_server(HostDBProcessor::getbyname_imm(Continuation*, void (Continuation::*)(HostDBInfo*), char const*, int, HostDBProcessor::Options const&)+0x72)[0x68c652]
> /z/bin/traffic_server(HttpSM::do_hostdb_lookup()+0xb8)[0x5b2f48]
> /z/bin/traffic_server(HttpSM::set_next_state()+0xdb5)[0x5c1815]
> /z/bin/traffic_server(HttpSM::state_send_server_request_header(int, void*)+0x15a)[0x5bd5da]
> /z/bin/traffic_server(HttpSM::main_handler(int, void*)+0xbd)[0x5c282d]
> /z/bin/traffic_server[0x749be6]
> /z/bin/traffic_server(NetHandler::mainNetEvent(int, Event*)+0x1f2)[0x73c742]
> /z/bin/traffic_server(EThread::execute()+0xa4a)[0x76ad4a]
> /z/bin/traffic_server[0x7699ba]
> /lib64/libpthread.so.0(+0x7294)[0x2b63a09ac294]
> /lib64/libc.so.6(clone+0x6d)[0x2b63a16d471d]
> {noformat}
> UPDATE: Few hours later, another server, same crash reason, different call-stack:
> {noformat}
> traffic_server: Segmentation fault (Address not mapped to object [0x2adc4759bff0])
> traffic_server - STACK TRACE: 
> /z/bin/traffic_server(crash_logger_invoke(int, siginfo*, void*)+0x99)[0x4b0e49]
> /lib64/libpthread.so.0(+0x10630)[0x2ad84e658630]
> /lib64/libc.so.6(+0x903de)[0x2ad84f5273de]
> /z/bin/traffic_server(Vol::aggWrite(int, void*)+0x715)[0x6ff6a5]
> /z/bin/traffic_server(Vol::evacuateDocReadDone(int, Event*)+0x3fa)[0x70092a]
> /z/bin/traffic_server(AIOCallbackInternal::io_complete(int, void*)+0x3d)[0x6812fd]
> /z/bin/traffic_server(EThread::process_event(Event*, int)+0x10f)[0x75e77f]
> /z/bin/traffic_server(EThread::execute()+0x6ef)[0x75f28f]
> /z/bin/traffic_server[0x75db0a]
> /lib64/libpthread.so.0(+0x72d4)[0x2ad84e64f2d4]
> /lib64/libc.so.6(clone+0x6d)[0x2ad84f57e74d]
> {noformat}
> Here're the relevant configure options of my build:
> {noformat}
> ./configure \
>         --with-xml=libxml2 \
>         --disable-static \
>         --disable-spdy \
>         --enable-interim-cache \
>         --enable-tproxy \
>         --enable-hwloc \
>         --enable-experimental-plugins \
>         --enable-example-plugins
> {noformat}



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