[noPoll] NoPoll does not install latest 0.4.7 version on centos 7

Thu Aug 11 11:08:52 CEST 2022

Hello Alexander,

About mirror, we do not controll that resource:

https://download.postgresql.org/pub/repos/yum/9.4/redhat/rhel-7-x86_64/repodata/repomd.xml: 
[Errno 14] HTTPS Error 404 - Not Found

About error you are reporting, we have:

|==16754==ERROR: AddressSanitizer: SEGV on unknown address 
0x7fff68000008 (pc 0x7fc1db73d30d bp 0x61100003a100 sp 0x7fc1d517a970 T6)||
||==16754==The signal is caused by a READ memory access.|

...at the same time, we have signal caused at this line 
(https://github.com/ASPLes/nopoll/blob/master/src/nopoll_conn.c#L3260):

|    /* get the first 2 bytes from the websocket header */||
||    bytes = __nopoll_conn_receive (conn, buffer, 2);||
||    if (bytes == 0) {||
||        /* connection not ready */||
||line 3260:        nopoll_log (conn->ctx, NOPOLL_LEVEL_DEBUG, 
"Connection id=%d without data, errno=%d : %s, returning no message",||
||                conn->id, errno, strerror (errno));||
||        return NULL;||
||    }|

Reading the line and the error, and knowing it is a very well tested 
execution path,
it looks like you are passing a deallocated connection, or similar. Not 
a nopoll issue.

Another indicator that something with the memory is not handled 
correctly, is that the
sigsegv report is failing on a function that returns constant strings, 
so in normal circumstances,
it cannot trigger SIGSEGV given strerror (int) => "const char *" 
(constant -> constant, no modify, no error)

|    #0 0x7fc1db73d30c in __GI_getenv (/usr/lib64/libc.so.6+0x3930c)||
||    #1 0x7fc1db734e2d in __dcigettext (/usr/lib64/libc.so.6+0x30e2d)||
||    #2 0x7fc1db790cdd in __GI___strerror_r 
(/usr/lib64/libc.so.6+0x8ccdd)||
||*    #3 0x7fc1db790c1e in strerror (/usr/lib64/libc.so.6+0x8cc1e)*||
||    #4 0x7fc1ddc1f5ec in nopoll_conn_get_msg 
/usr/src/nopoll/trunk/rpm/BUILD/nopoll-0.4.7.b429/src/nopoll_conn.c:3260||
||    #5 0xcbd60f in wsfeed_perform_single_feed_operation 
/home/petliar/mygitworkdir/inrush_ftx_2/libwsfeed/wsfeed.c:450||
||    #6 0x8650fa in worker_main 
/home/petliar/mygitworkdir/inrush_ftx_2/libserverx86/server_worker.c:2155||
||    #7 0x7fc1de9b7ea4 in start_thread 
(/usr/lib64/libpthread.so.0+0x7ea4)||
||    #8 0x7fc1db8029fc in clone (/usr/lib64/libc.so.6+0xfe9fc)|

However, having said that, it is also suspicious that the signal trigger 
is located
at __GI_getenv...maybe you are using an outdated libc6...or some locale 
configuration
causing problems while attempting to get a localized strerror (errno). 
If that is the case,
try running your application changing locale to defaults and see it it 
is more stable:

|LANG=C ./your-application-running-nopoll|

In any case, this backtrace is very rare, so I will bet for the simplest 
explanation first: something
with the memory (double deallocation, passing something that is not a 
connection, deallocating
segments affecting part of your application...).

Best Regards,

El 11/8/22 a las 7:26, Alexander Petliar escribió:
> Hello Francis,
>
>   * We were able to download 0.4.7 version for centos 7.
>   * Thank you for your help with this issue!
>   * May it be that the mirrors were updated overnight?
>
>     sudo yum install libnopoll0-dev libnopoll0  --downloadonly
>     --downloaddir=/tmp
>     [petliar at ip-10-148-18-164 ~]$ ll /tmp/
>     -rw-r--r-- 1 root root 160776 Aug 10 07:20
>     libnopoll0-0.4.7.b429-5.el7.x86_64.rpm
>     -rw-r--r-- 1 root root  18664 Aug 10 07:20
>     libnopoll0-dev-0.4.7.b429-5.el7.x86_64.rpm
>
>
>   * *We have a crash inside the nopoll library.*
>     After running for some time (one time it was 10 minutes, another
>     time it was 30 minutes) and receiving and processing hundreds and
>     thousands of messages, it stopped, see below.
>     Could you please help us understand the problem and how to fix it?
>
>
>     ASAN:DEADLYSIGNAL
>     =================================================================
>     Thu Aug 11 00:32:30.522 SYSTEM_MONITOR NOTICE  [0] | "FTX" is in
>     America/New_York
>     Thu Aug 11 00:32:30.522 SYSTEM_MONITOR DEBUG   fh_do_tz_check()
>     Doing TZ check
>     Thu Aug 11 00:32:30.522 SYSTEM_MONITOR DEBUG   fh_do_tz_check()
>     America/New_York : Thu Aug 11 00:32:30 2022
>     ==16754==ERROR: AddressSanitizer: SEGV on unknown address
>     0x7fff68000008 (pc 0x7fc1db73d30d bp 0x61100003a100 sp
>     0x7fc1d517a970 T6)
>     ==16754==The signal is caused by a READ memory access.
>     Thu Aug 11 00:32:30.531 SYSTEM_MONITOR NOTICE  Setting UTC offset
>     for [0] | "FTX" to 1660190400000000000
>     Thu Aug 11 00:32:30.531 FCPSRV   DEBUG  
>     CMD_UPDATE_EXCHANGE_TZ_OFFSET feed:FTX offset:-7563181636854775808
>         #0 0x7fc1db73d30c in __GI_getenv (/usr/lib64/libc.so.6+0x3930c)
>         #1 0x7fc1db734e2d in __dcigettext (/usr/lib64/libc.so.6+0x30e2d)
>         #2 0x7fc1db790cdd in __GI___strerror_r
>     (/usr/lib64/libc.so.6+0x8ccdd)
>         #3 0x7fc1db790c1e in strerror (/usr/lib64/libc.so.6+0x8cc1e)
>         #4 0x7fc1ddc1f5ec in nopoll_conn_get_msg
>     /usr/src/nopoll/trunk/rpm/BUILD/nopoll-0.4.7.b429/src/nopoll_conn.c:3260
>         #5 0xcbd60f in wsfeed_perform_single_feed_operation
>     /home/petliar/mygitworkdir/inrush_ftx_2/libwsfeed/wsfeed.c:450
>         #6 0x8650fa in worker_main
>     /home/petliar/mygitworkdir/inrush_ftx_2/libserverx86/server_worker.c:2155
>         #7 0x7fc1de9b7ea4 in start_thread
>     (/usr/lib64/libpthread.so.0+0x7ea4)
>         #8 0x7fc1db8029fc in clone (/usr/lib64/libc.so.6+0xfe9fc)
>
>
>
>     Regards,
>   * Alexander Petliar
>     Pico / Redline Trading Solution
>
>
> ------------------------------------------------------------------------
> *From:* Alexander Petliar <alexander.petliar at pico.net>
> *Sent:* Wednesday, August 10, 2022 5:55 PM
> *To:* Francis Brosnan Blazquez <francis.brosnan at aspl.es>; 
> nopoll at lists.aspl.es <nopoll at lists.aspl.es>
> *Cc:* Michael Feole <michael.feole at pico.net>; John Moore 
> <john.moore at pico.net>
> *Subject:* Re: [noPoll] NoPoll does not install latest 0.4.7 version 
> on centos 7
> Francis,
>
> We are located in the USA, may it be that the mirror servers serving 
> North America are not updated?
>
> Regards,
> Alexander
>
> ------------------------------------------------------------------------
> *From:* Alexander Petliar <alexander.petliar at pico.net>
> *Sent:* Wednesday, August 10, 2022 9:53 AM
> *To:* Francis Brosnan Blazquez <francis.brosnan at aspl.es>; 
> nopoll at lists.aspl.es <nopoll at lists.aspl.es>
> *Cc:* Michael Feole <michael.feole at pico.net>
> *Subject:* Re: [noPoll] NoPoll does not install latest 0.4.7 version 
> on centos 7
> Hello Francis,
>
> Here is the corrected output:
>
> petliar at ip-10-148-20-125 ~]$ sudo yum install libnopoll0-dev 
> libnopoll0  --downloadonly
> Loaded plugins: fastestmirror
> Loading mirror speeds from cached hostfile
>  * base: mirror.centos.org
>  * epel: forksystems.mm.fcix.net
>  * extras: mirror.centos.org
>  * updates: mirror.centos.org
> Resolving Dependencies
> --> Running transaction check
> ---> Package libnopoll0.x86_64 0:0.4.6.b400-5.el7 will be installed
> ---> Package libnopoll0-dev.x86_64 0:0.4.6.b400-5.el7 will be installed
> --> Finished Dependency Resolution
>
> Dependencies Resolved
>
> ==============================================================================================================================================================================================================================================================================
>  Package   Arch      Version                   Repository             
>                Size
> ==============================================================================================================================================================================================================================================================================
> Installing:
>  libnopoll0  x86_64      0.4.6.b400-5.el7                   
>  aspl-public                            157 k
>  libnopoll0-dev  x86_64      0.4.6.b400-5.el7                   
>  aspl-public                             18 k
>
> Transaction Summary
> ==============================================================================================================================================================================================================================================================================
> Install  2 Packages
>
> Total size: 175 k
> Installed size: 689 k
> Background downloading packages, then exiting:
> exiting because "Download Only" specified
>
>
> Thanks,
> Alexander
> ------------------------------------------------------------------------
> *From:* Alexander Petliar <alexander.petliar at pico.net>
> *Sent:* Wednesday, August 10, 2022 9:43 AM
> *To:* Francis Brosnan Blazquez <francis.brosnan at aspl.es>; 
> nopoll at lists.aspl.es <nopoll at lists.aspl.es>
> *Cc:* Michael Feole <michael.feole at pico.net>
> *Subject:* Re: [noPoll] NoPoll does not install latest 0.4.7 version 
> on centos 7
> Hello Francis,
>
> I tried it again, but the problem still exists, it installs 0.4.6 
> version for centos7, please see below:
>
>
> [petliar at ip-10-148-20-125 ~]$ sudo yum install libnopoll0-dev 
> libnopoll0  --downloadonly
> Loaded plugins: fastestmirror
> https://download.postgresql.org/pub/repos/yum/9.4/redhat/rhel-7-x86_64/repodata/repomd.xml: 
> [Errno 14] HTTPS Error 404 - Not Found
> Trying other mirror.
> To address this issue please refer to the below knowledge base article
>
> https://access.redhat.com/articles/1320623
>
> If above article doesn't help to resolve this issue please create a 
> bug on https://bugs.centos.org/
>
> Loading mirror speeds from cached hostfile
>  * base: mirror.centos.org
>  * epel: forksystems.mm.fcix.net
>  * extras: mirror.centos.org
>  * updates: mirror.centos.org
> Resolving Dependencies
> --> Running transaction check
> ---> Package libnopoll0.x86_64 0:0.4.6.b400-5.el7 will be installed
> ---> Package libnopoll0-dev.x86_64 0:0.4.6.b400-5.el7 will be installed
> --> Finished Dependency Resolution
>
> Dependencies Resolved
>
> ==============================================================================================================================================================================================================================================================================
>  Package                                               Arch  Version   
>               Repository                            Size
> ==============================================================================================================================================================================================================================================================================
> Installing:
>  libnopoll0                                                x86_64 
>  0.4.6.b400-5.el7                  aspl-public                         
>    157 k
>  libnopoll0-dev                                                x86_64 
>  0.4.6.b400-5.el7                  aspl-public                         
>     18 k
>
> Transaction Summary
> ==============================================================================================================================================================================================================================================================================
> Install  2 Packages
>
> Total download size: 175 k
> Installed size: 689 k
> Background downloading packages, then exiting:
> (1/2): libnopoll0-dev-0.4.6.b400-5.el7.x86_64.rpm                     
>    |  18 kB  00:00:00
> (2/2): libnopoll0-0.4.6.b400-5.el7.x86_64.rpm                        | 
> 157 kB  00:00:00
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> Total 305 kB/s | 175 kB  00:00:00
> exiting because "Download Only" specified
>
>
>
>
> Thanks,
> Alexander
> ------------------------------------------------------------------------
> *From:* Francis Brosnan Blazquez <francis.brosnan at aspl.es>
> *Sent:* Wednesday, August 10, 2022 7:35 AM
> *To:* Alexander Petliar <alexander.petliar at pico.net>; 
> nopoll at lists.aspl.es <nopoll at lists.aspl.es>
> *Cc:* Michael Feole <michael.feole at pico.net>
> *Subject:* Re: [noPoll] NoPoll does not install latest 0.4.7 version 
> on centos 7
>
> Hello Alexander,
>
> Problem is now fixed. You should be able to download latest stable 
> published.
>
> Best Regards,
>
> |[root at centos-7-amd64 src]# yum install libnopoll0-dev libnopoll0  
> --downloadonly||
> ||Loaded plugins: fastestmirror||
> ||Loading mirror speeds from cached hostfile||
> || * base: mirror.uv.es||
> || * epel: mirror.uv.es||
> || * extras: mirror.uv.es||
> || * updates: mirror.uv.es||
> ||Resolving Dependencies||
> ||--> Running transaction check||
> ||---> Package libnopoll0.x86_64 0:0.4.2.b289-5.el7.centos will be 
> updated||
> ||---> Package libnopoll0.x86_64 0:0.4.6.b400-5.el7 will be updated||
> ||---> Package libnopoll0.x86_64 0:0.4.7.b429-5.el7 will be an update||
> ||---> Package libnopoll0-dev.x86_64 0:0.4.2.b289-5.el7.centos will be 
> updated||
> ||---> Package libnopoll0-dev.x86_64 0:0.4.6.b400-5.el7 will be updated||
> ||---> Package libnopoll0-dev.x86_64 0:0.4.7.b429-5.el7 will be an 
> update||
> ||--> Finished Dependency Resolution||
> ||
> ||Dependencies Resolved||
> ||
> ||=========================================================================================================================================================================================================================================||
> || Package Arch Version 
> Repository                                              Size||
> ||=========================================================================================================================================================================================================================================||
> ||Updating:||
> || libnopoll0 x86_64 0.4.7.b429-5.el7 core-admin 157 k||
> || libnopoll0-dev x86_64 0.4.7.b429-5.el7 
> core-admin                                              18 k||
> ||
> ||Transaction Summary||
> ||=========================================================================================================================================================================================================================================||
> ||Upgrade  2 Packages||
> ||
> ||Total size: 175 k||
> ||Background downloading packages, then exiting:||
> ||exiting because "Download Only" specified|
>
>
> El 9/8/22 a las 18:11, Alexander Petliar escribió:
>> Hello,
>>
>> Could you please help me with the following problem:
>> I am following the installation instruction from the website 
>> (https://www.aspl.es/nopoll/downloads.html 
>> <https://www.aspl.es/nopoll/downloads.html>)
>> to install NoPoll library on my Centos 7,
>> and it installs 0.4.6 version instead of the latest 0.4.7
>>
>> Please see my steps below:
>>
>> >yum search nopoll
>>     ...........
>> ========================================================= N/S 
>> matched: nopoll ========================================
>> libnopoll0.x86_64 : WebSocket OpenSource implementation
>>   libnopoll0-dev.x86_64 : WebSocket OpenSource implementation (devel)
>>
>> >sudo yum install libnopoll0.x86_64
>>        ......
>>      Downloading packages:
>> *libnopoll0-0.4.6.b400-5.el7.x86_64.rpm*
>> Installed:
>> *           libnopoll0.x86_64 0:0.4.6.b400-5.el7*
>> *
>> *
>>
>>
>> Regards,
>> Alexander Petliar
>> Pico / Redline Trading Solution
>>
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