Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

Bug 1278796

Summary:	logshifter stops sending logs to syslog
Product:	OpenShift Container Platform	Reporter:	Evgheni Dereveanchin <ederevea>
Component:	Logging	Assignee:	Luke Meyer <lmeyer>
Status:	CLOSED DUPLICATE	QA Contact:	chunchen <chunchen>
Severity:	high	Docs Contact:
Priority:	high
Version:	2.2.0	CC:	aos-bugs, dmace, ederevea, erich, pep, uobergfe, wsun
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-11-26 13:02:11 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1284900
Bug Blocks:	1273542

Description Evgheni Dereveanchin 2015-11-06 12:52:18 UTC

Description of problem:
in certain conditions, a logshifter process configured for syslog stops sending logs. It reads the pipe yet no messages are received on syslog side. This causes major issues with gear logging as the gear needs a restart to fix this

Version-Release number of selected component (if applicable):
openshift-origin-logshifter-1.8.1.0-1.el6op

How reproducible:
sometimes with gears having high log volume

Steps to Reproduce:
no clear reproducer at the moment. The gear can run for months before this issue reoccurs.

Comment 8 Dan Mace 2015-11-10 15:21:14 UTC

To continue diagnosing this, we'll need either:

1. Steps to reproduce.
2. A stack dump from logshifter while it's observed to be in a stalled state. This can be obtained by issuing a SIGABRT to the logshifter process.

Comment 17 Josep 'Pep' Turro Mauri 2015-11-26 13:02:11 UTC

Investigation of this bug revealed that the root cause is not in logshifter. It appears to be a problem in the kernel's epoll facility. This is being tracked in a separate bug report for the kernel (bug 1284900).

The resolution of the kernel bug should address the problem reported in here for logshifter, so I'm closing this one as a duplicate.

*** This bug has been marked as a duplicate of bug 1284900 ***