Description of problem:
If httpd.pid file is corrupted, apached based cartridge like php and perl can not be started.

[downloadphpapp-domxq1.dev.rhcloud.com run]\> echo >httpd.pid 

[downloadphpapp-domxq1.dev.rhcloud.com run]\> gear start
Starting gear...
CLIENT_MESSAGE: Starting Apache+mod_php HTTPD server
(20014)Internal error: Error retrieving pid file run/httpd.pid
Remove it before continuing if it is corrupted.
An error occurred executing 'gear start' (exit code: 1)
Error message: Failed to execute: 'control start' for /var/lib/openshift/ad509918d8ac11e2a0f322000a9a98e8/php

For more details about the problem, try running the command again with the '--trace' option.

Version-Release number of selected component (if applicable):
devenv_3383

How reproducible:
Always

Steps to Reproduce:
1. ssh to the app and echo >httpd.pid 
2. run gear start/restart or rhc app start/restart $appname
3. remove httpd.pid
4. run gear start/restart


Actual results:
After step 2:
[root@ip-10-154-152-232 ~]# rhc app-start downloadphpapp
Unable to complete the requested operation due to: Failed to correctly execute all parallel operations - --DEBUG--
Failed to execute: 'control start' for /var/lib/openshift/ad509918d8ac11e2a0f322000a9a98e8/php

(20014)Internal error: Error retrieving pid file run/httpd.pid
Remove it before continuing if it is corrupted.

--RESULT--

--MESSAGE--
Starting Apache+mod_php HTTPD server

--ERROR--

--APP INFO--

--CART COMMANDS--

--CART PROPERTIES--
{}
--DATA--

--EXIT CODE--
1
--USER ACTIONABLE--
false
.
Reference ID: 8ad8d6b7741359386257b61be498d845


After step 4:
[downloadphpapp-domxq1.dev.rhcloud.com run]\> rm httpd.pid 
[downloadphpapp-domxq1.dev.rhcloud.com run]\> ls -lh
total 0
[downloadphpapp-domxq1.dev.rhcloud.com run]\> gear start
Starting gear...
CLIENT_MESSAGE: Starting Apache+mod_php HTTPD server
(98)Address already in use: make_sock: could not bind to address 127.0.252.1:8080
no listening sockets available, shutting down
Unable to open logs
An error occurred executing 'gear start' (exit code: 1)
Error message: Failed to execute: 'control start' for /var/lib/openshift/ad509918d8ac11e2a0f322000a9a98e8/php

[downloadphpapp-domxq1.dev.rhcloud.com run]\> netstat  |grep 127.0.252.1
[downloadphpapp-domxq1.dev.rhcloud.com run]\> 



Expected results:
It should be started/restarted successfully even if  httpd.pid is  corrupted.

Additional info:

Part of broker log( check whole log in attchment pls)
2013-06-19 03:13:08.723 [DEBUG] DEBUG: Output of parallel execute: [{:tag=>{"op_id"=>"51c15a02f054168bee00016c"}, :gear=>"ad509918d8ac11e2a0f322000a9a98e8", :job=>{:cartridge=>"openshift-origin-node", :action=>"start", :args=>{"--with-app-uuid"=>"ad509918d8ac11e2a0f322000a9a98e8", "--with-app-name"=>"downloadphpapp", "--with-container-uuid"=>"ad509918d8ac11e2a0f322000a9a98e8", "--with-container-name"=>"downloadphpapp", "--with-namespace"=>"domxq1", "--with-request-id"=>"8ad8d6b7741359386257b61be498d845", "--cart-name"=>"php-5.3", "--component-name"=>"openshift-php-5.3", "--with-software-version"=>"5.3", "--cartridge-vendor"=>"openshift"}}, :result_stdout=>"Failed to execute: 'control start' for /var/lib/openshift/ad509918d8ac11e2a0f322000a9a98e8/php\nCLIENT_MESSAGE: Starting Apache+mod_php HTTPD server\n\n(20014)Internal error: Error retrieving pid file run/httpd.pid\nRemove it before continuing if it is corrupted.\n", :result_stderr=>"", :result_exit_code=>1}], exitcode: 0, from: ip-10-154-152-232  (Request ID: 8ad8d6b7741359386257b61be498d845) (pid:2165)
2013-06-19 03:13:08.728 [DEBUG] DEBUG: MCollective Response Time (execute_parallel): 1.723373855s  (Request ID: 8ad8d6b7741359386257b61be498d845) (pid:2165)
2013-06-19 03:13:08.728 [DEBUG] DEBUG: server results: Failed to execute: 'control start' for /var/lib/openshift/ad509918d8ac11e2a0f322000a9a98e8/php (pid:2165)