Lager: Crash.log is deleted from the folder, only rotated versions are present

[Larisa Krasnytskaya]

Hello!

 

After some time of app’s work, “crash.log” file appears to be deleted. Only rotated versions are present.

On one environment only one of them is present (crash.log.4), on another - more (crash.log.0, crash.log.3, crash.log.4).

 

Some inputs:

·        Scheduled rotation makes files to be deleted (by default rotation is happening on midnight);

·        Continuous application restart (as Windows service) makes files to be numbered incorrectly ;

·        Single application restart made crash.log file to be recreated;

 

Here is my lager confg:

 

  {lager, [

    {handlers, [

        {lager_file_backend, [{file, "log/error.log"}, {level, error}, {size, 10485760}, {count, 59}]},

        {lager_file_backend, [{file, "log/info.log"}, {level, info}, {size, 10485760}, {count, 29}]},

        {lager_file_backend, [{file, "log/debug.log"}, {level, debug}, {size, 31457280}, {count, 99}]}

    ] },

    {crash_log, "log/crash.log"}

  ] }

 

It looks like that the {crash_log_count} is equal to the default value, i.e. 5.

 

Lager version 3.2.4 (https://github.com/basho/lager/)

OS: Windows Server 2012

 

I would appreciate any tips on why this can happens.

 

 

Thanks in advance, Larisa

 

[Luke Bakken]

Hi Larisa,

I suggest that you use Lager from the current, official repository:

https://github.com/erlang-lager/lager

This PR that I submitted a while back probably fixes the issue you are
seeing - https://github.com/erlang-lager/lager/pull/509

Let me know how it goes -
Luke