Rails - Aug 2007 - Mongrel cluster and Log4r ?

Hi everyone,

Anybody is using Mongrel cluster and log4r (FileOutputter) in production
?
I am using that 3 mongrel clusters on the same server, logging to
log/production.log with log4r FileOutputter.
But unfortunately my logs get somehow interlaced...:-(
In one line I have a bit of log of process PID A as well as bit of log
of process ID B.

i looked a the Log4r manual about thread saftyness.. i see nothing wrong
in my log4r config

Here is an example of  log line I got :
< INFO> Aug 23 15:01:26 [4997]:   Parameters:
{"user"=>{"login_email"=>"seb-T7aq53A5KFg@public.gmane.org",
"challenge"=>"4c937c1698c583ff43afsdeb059cdf50c7c7a7c6",<
INFO> Aug 23
15:01:26 [5000]:


below is the my log4r config YML file.

log4r_config:
  # define all loggers ...
  loggers:
    - name      : default
      level     : DEBUG
      additive  : ''true''
      trace     : ''false''
      outputters:
        - fastFileOutputter


  outputters:

    - type     : FileOutputter
      name     : fastFileOutputter
      level    : DEBUG
      filename : "#{log_dir}/#{RAILS_ENV}.log"
      formatter:
        date_pattern: ''%b %d %H:%M:%S''
        pattern     : "<%5l> %d [#{pid}]: %m"
        type        : PatternFormatter
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After further investigation into the Log4r source code, I realized I was 
missing one really important config parameter : ''trunc''.

This should absolutely be set to true in a cluster environement 
otherwise you will likely have interlaced logs :-(

problem soldved.

below is the final working config

log4r_config:
  # define all loggers ...
  loggers:
    - name      : default
      level     : DEBUG
      additive  : ''true''
      trace     : ''false''
      outputters:
        - fastFileOutputter


  outputters:

    - type     : FileOutputter
      name     : fastFileOutputter
      level    : DEBUG
      filename : "#{log_dir}/#{RAILS_ENV}.log"
      trunc    : ''false''
      formatter:
        date_pattern: ''%b %d %H:%M:%S''
        pattern     : "<%5l> %d [#{pid}]: %m"
        type        : PatternFormatter

-sebastien CANTE
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