[syslog-ng] syslog-ng 3.22.1 consuming a lot of RAM on amqp or kafka destinations - patterndb

Mon Aug 26 07:32:05 UTC 2019

Hi Joao,

Could you please share the whole config file, or the minimal config parts for the problem to happen, so we can reproduce the issue locally? The patterndb xml file will probably also be needed.
There were some PRs merged related to patterndb since 3.17, but I cannot say for sure, which would introduce a memory leak.

If you would like to debug syslog-ng for yourself, you can run it with valgrind.
For example: valgrind --leak-check=full sbin/syslog-ng -Fedtv

Thanks!

Best regards,
Attila
________________________________
From: syslog-ng <syslog-ng-bounces at lists.balabit.hu> on behalf of joao reis <joao at 7lan.net>
Sent: Sunday, August 25, 2019 9:19 PM
To: syslog-ng at lists.balabit.hu <syslog-ng at lists.balabit.hu>
Subject: Re: [syslog-ng] syslog-ng 3.22.1 consuming a lot of RAM on amqp or kafka destinations - patterndb

CAUTION: This email originated from outside of the organization. Do not follow guidance, click links, or open attachments unless you recognize the sender and know the content is safe.

Ok, I did another tests and discover that the problem is not amqp or
kafka destination, but the parserdb.

Removing the parser in the log line, the memory keeps normal.

Downgrading to syslog-ng 3.17 I can use the parserdb with amqp without
the memory leak problem. I didn't test with newer versions yet, but
seems to be a memory leak problem with patterndb. I will remove the
"<action>" sections in patterndb to see if it change something in 3.22...

Any known issue?

On 8/24/19 9:18 AM, joao reis wrote:
> Hi,
>
> I'm having high RAM consuming problems using both amqp or kafka
> destinations. I'm using patterndb (without any context definition)
> some basic filters.
>
> Changing the destination to "file" or "program" type, the high RAM
> problem doesn't happen.
>
> I tested these backends only in this version of syslog-ng and I don't
> know if it is a version specific problem.
>
> The backends are up and running and receiving correctly from syslog-ng.
>
> Here are my configurations:
>
> destination d_amqp {
>     amqp(
>         vhost("/email_log")
>         host("127.0.0.1")
>         port(5672)
>         exchange("maillog")
>         username("maillog")
>         password("maillog")
>         disk-buffer(
>             mem-buf-size(10000)
>             disk-buf-size(2000000)
>             reliable(yes)
>             dir("/tmp/disk-buffer")
>         )
>         exchange-type("fanout")
>         routing-key("")
>         persistent(yes)
>         value-pairs(
>             scope("nv-pairs")
>         )
>     );
> };
>
>
> destination d_kafka {
>   kafka(
>     bootstrap-servers("127.0.0.1:9092")
>     topic("MYTOPIC")
>   );
> };
>
>
> I added the disk-buffer option to see if it gets any better, but
> without any good result;
>
> Here the syslog-ng-ctl output, when configured to amqp:
>
> [root at logserver3 conf.d]# syslog-ng-ctl stats
> SourceName;SourceId;SourceInstance;State;Type;Number
> global;payload_reallocs;;a;processed;3635299
> src.journald;s_sys#0;journal;a;processed;542
> src.journald;s_sys#0;journal;a;stamp;1566648214
> global;sdata_updates;;a;processed;0
> global;scratch_buffers_bytes;;a;queued;512
> source;s_host;;a;processed;5440633
> destination;d_boot;;a;processed;0
> destination;d_kern;;a;processed;9
> source;s_sys;;a;processed;612
> dst.amqp;d_amqp#0;amqp,/email_log,127.0.0.1,5672,maillog,fanout;a;dropped;0
>
> dst.amqp;d_amqp#0;amqp,/email_log,127.0.0.1,5672,maillog,fanout;a;processed;2691676
>
> dst.amqp;d_amqp#0;amqp,/email_log,127.0.0.1,5672,maillog,fanout;a;queued;0
>
> dst.amqp;d_amqp#0;amqp,/email_log,127.0.0.1,5672,maillog,fanout;a;written;2691676
>
> src.internal;s_sys#1;;a;processed;70
> src.internal;s_sys#1;;a;stamp;1566648339
> global;msg_clones;;a;processed;2691634
> global;internal_queue_length;;a;processed;0
> destination;d_spol;;a;processed;0
> destination;d_mlal;;a;processed;0
> center;;received;a;processed;5441245
> destination;d_mesg;;a;processed;531
> destination;d_mail;;a;processed;0
> destination;d_auth;;a;processed;29
> destination;d_cron;;a;processed;52
> destination;d_amqp;;a;processed;2691676
> global;scratch_buffers_count;;a;queued;5970004541496
> center;;queued;a;processed;2692297
>
> Thanks in advance.
>
>
>
> ______________________________________________________________________________
>
> Member info: https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C3f366968cc6848e50dfc08d7299137f4%7C91c369b51c9e439c989c1867ec606603%7C0%7C1%7C637023576067773885&sdata=IevvrtaCVev4wWIIkX2qQ3USXFqgswZE%2Fr%2BSN7fps7I%3D&reserved=0
> Documentation:
> https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C3f366968cc6848e50dfc08d7299137f4%7C91c369b51c9e439c989c1867ec606603%7C0%7C1%7C637023576067773885&sdata=o4nPzuf08QzuA0gWM2YhR46tBfzYxCk2rEcAHB%2B2BYM%3D&reserved=0
> FAQ: https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C3f366968cc6848e50dfc08d7299137f4%7C91c369b51c9e439c989c1867ec606603%7C0%7C1%7C637023576067773885&sdata=1UinGzeqP9y8I42N0m2pnTtSYk%2BCzpN7SWuhPhGyhLs%3D&reserved=0
>
______________________________________________________________________________
Member info: https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.balabit.hu%2Fmailman%2Flistinfo%2Fsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C3f366968cc6848e50dfc08d7299137f4%7C91c369b51c9e439c989c1867ec606603%7C0%7C1%7C637023576067773885&sdata=IevvrtaCVev4wWIIkX2qQ3USXFqgswZE%2Fr%2BSN7fps7I%3D&reserved=0
Documentation: https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fsupport%2Fdocumentation%2F%3Fproduct%3Dsyslog-ng&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C3f366968cc6848e50dfc08d7299137f4%7C91c369b51c9e439c989c1867ec606603%7C0%7C1%7C637023576067773885&sdata=o4nPzuf08QzuA0gWM2YhR46tBfzYxCk2rEcAHB%2B2BYM%3D&reserved=0
FAQ: https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.balabit.com%2Fwiki%2Fsyslog-ng-faq&data=02%7C01%7CAttila.Szakacs%40oneidentity.com%7C3f366968cc6848e50dfc08d7299137f4%7C91c369b51c9e439c989c1867ec606603%7C0%7C1%7C637023576067773885&sdata=1UinGzeqP9y8I42N0m2pnTtSYk%2BCzpN7SWuhPhGyhLs%3D&reserved=0

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.balabit.hu/pipermail/syslog-ng/attachments/20190826/a11f62ce/attachment-0001.html>