Bug 73543

Summary:	Unexpected errors in LD_DEBUG debug logs?
Product:	[Retired] Red Hat Raw Hide	Reporter:	Joe Orton <jorton>
Component:	glibc	Assignee:	Jakub Jelinek <jakub>
Status:	CLOSED NOTABUG	QA Contact:	Brian Brock <bbrock>
Severity:	low	Docs Contact:
Priority:	low
Version:	1.0	CC:	fweimer
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
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Fixed In Version:		Doc Type:	Bug Fix
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Last Closed:	2002-09-05 22:30:40 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Joe Orton 2002-09-05 22:30:34 UTC

Description of Problem:
Whilst using LD_DEBUG to track down an Apache bug, I noticed that the debug 
log produced using LD_DEBUG=files contains some curious errors along with the
normal output: a number of errors as follows:

31622:  /lib/libnss_nisplus.so.2: error: relocation error: undefined symbol:
_nss_nisplus_initgroups_dyn (fatal)

The processes operate correctly and the debug log contains all the expected
output along with these errors messages.

Version-Release number of selected component (if applicable):
glibc-2.2.93-3

How Reproducible:
Always

Steps to Reproduce:
From a recent "everything" install:

$ su -
# LD_DEBUG=files LD_DEBUG_OUTPUT=/tmp/ldebug /usr/sbin/httpd
# service httpd stop

Actual Results:
# grep error /tmp/ldebug.*
many errors in log like:
31622:
/lib/libnss_files.so.2: error: relocation error: undefined symbol:
_nss_files_initgroups_dyn (fatal)

Expected Results:
No errors

Comment 1 Jakub Jelinek 2002-09-09 11:08:38 UTC

That comes from dlsym() - only libnss_nis.so.2 contains a initgroups_dyn
handler and the generic code just attempts to look it up and if it has not
succeeded, falls back to a default handling.