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From "Jan Provaznik (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DTACLOUD-290) Memory leaking on Fedora 17
Date Wed, 01 Aug 2012 09:33:03 GMT
Jan Provaznik created DTACLOUD-290:
--------------------------------------

             Summary: Memory leaking on Fedora 17
                 Key: DTACLOUD-290
                 URL: https://issues.apache.org/jira/browse/DTACLOUD-290
             Project: DeltaCloud
          Issue Type: Bug
          Components: Server
         Environment: deltacloud-core-1.0.0-4.fc17.noarch (though same issue with dc-core
from git)
sinatra (1.3.2)
sinatra-rabbit (1.0.6)
Fedora 17
            Reporter: Jan Provaznik
            Priority: Critical


Memory used by deltacloudd process increases with time. After 12 hours, it's common it uses
~4G of virt memory and >1G of physical memory (only conductor's dbomatic script which periodically
checks running instances every minute was running).

You can reproduce the memory leak by this simple script:
#!/usr/bin/ruby                                                                 
require 'rubygems'                                                              
require 'deltacloud'                                                            
1000.times do |i| { DeltaCloud.new('mockuser', 'mockpassword', 'http://localhost:3002/api')
}

Used memory will increase by >10M (both virt and physical). The problem is probably with
lambda in check_capability usage in lib/deltacloud/collections/* files:
check_capability :for => lambda { |m| driver.respond_to? m }

if the lambda is replaced by true or other static value, the memory usage remains constant.
I see that in git the 'check_capability' call was replaced by 'set' call, this change has
no influence on this problem.

Also it's weird that after starting deltacloudd, used memory is 233m/33m (virt/res), but after
first request, used memory jumps to 776m/90m (virt/res) - this is far more than on Fedora
16, where used memory remains around 160m/50m.

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