Bug 1128009

Summary:	Failed to threaddump rails4 quickstart after access the app url
Product:	OpenShift Online	Reporter:	XiuJuan Wang <xiuwang>
Component:	Templates	Assignee:	Jakub Hadvig <jhadvig>
Status:	CLOSED WONTFIX	QA Contact:	libra bugs <libra-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	2.x	CC:	dmcphers, jokerman, mfojtik, mmccomas
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Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2015-06-12 02:02:03 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description XiuJuan Wang 2014-08-08 06:03:14 UTC

Description of problem:
Can't thread dump rails4 quickstart of ruby-2.0 after access the app url,showing "Unable to detect application PID. Check the application's availability by accessing http://<app>-<domain>.dev.rhcloud.com."

Check the process in app, there is no Passenger RackApp process existed

It works for normal ruby-2.0 app.

Version-Release number of selected component (if applicable):
devenv_5052

How reproducible:
Always

Steps to Reproduce:
1.Create a rails application
rhc app create railsapp ruby-2.0 mysql-5.5
2.Add this upstream Rails4 quickstart repository
cd rails4
git remote add upstream -m master git://github.com/openshift/rails4-example.git
git pull -s recursive -X theirs upstream master
git push
3.Access this app
4.Threaddump this app

Actual results:
Step 4:
# rhc threaddump rails4 
 Unable to detect application PID. Check the application's availability by accessing http://rails4-abcd.dev.rhcloud.com

Expected results:
Could threaddump this app

Additional info:

Comment 1 Michal Fojtik 2014-08-08 11:12:49 UTC

AFAIK, thread dump is not supported for ruby > 1.8 (including rails3/ruby1.9). I will make jhadvig double check this as he was working on it.