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Bug 1099511 - [PATCH] rpmdb often gets corrupted upon concurrent access due to a race in CDB
Summary: [PATCH] rpmdb often gets corrupted upon concurrent access due to a race in CDB
Keywords:
Status: CLOSED INSUFFICIENT_DATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: db4
Version: 6.7
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Jan Staněk
QA Contact: qe-baseos-daemons
URL:
Whiteboard:
Depends On:
Blocks: 1112653
TreeView+ depends on / blocked
 
Reported: 2014-05-20 13:37 UTC by Lubomir Rintel
Modified: 2017-10-06 17:57 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 1099509
: 1112653 (view as bug list)
Environment:
Last Closed: 2015-10-14 06:32:17 UTC
Target Upstream Version:
Embargoed:
mleitner: needinfo-

Attachments (Terms of Use)
Fix for bdb issue #3514381; el6/db4 (2.67 KB, patch)
2014-05-20 13:37 UTC, Lubomir Rintel 		no flags Details | Diff
View All

Description Lubomir Rintel 2014-05-20 13:37:45 UTC 
Created attachment 897576 [details]
Fix for bdb issue #3514381; el6/db4

Cloning the bug for el6.
The patch is a bit different, the older version only contains the reader/writer table issue.

+++ This bug was initially created as a clone of Bug #1099509 +++

Description of problem:

Our continuous integration often encounters a situation when rpmdb gets corrupted while a rpmdb reader meets with a package installation. We've tracked down the issue to a race condition in CDB and upstream had now kindly provided a fix.

Upstream bug report: https://community.oracle.com/thread/3514381

Test cases (slow one, that reproduces the issue with RPM, and a minimal one for db4) are here: http://v3.sk/~lkundrak/bdb-crash/

Attaching the fix.

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

libdb-5.3.21-17.el7.x86_64
Comment 8 Jan Staněk 2014-06-24 11:38:43 UTC 
Attached patch applied.

Commit: http://pkgs.devel.redhat.com/cgit/rpms/db4/commit/?h=rhel-6.6&id=a6636742a157fe3db05a444156d75c6a1e7fc273
Comment 12 Jan Staněk 2014-07-08 09:01:45 UTC 
Hi Lubomir,
the provided fix seems nonworking - the tests still fails even with db4 with provided patch applied.

Test run:
$ make test
sh test.sh
Tue Jul  8 09:52:20 CEST 2014
test.sh: line 9: 17651 Segmentation fault      (core dumped) ./reader
Reader died
test.sh: line 12: 22785 Terminated              ( while ./writer; do
    :;
done; echo 'Writer died' )
Tue Jul  8 10:29:34 CEST 2014

Backtrace:
$ gdb ./reader core.17651
Program terminated with signal 11, Segmentation fault.
#0  0x0000003203678674 in _int_free () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.147.el6.x86_64
(gdb) bt
#0  0x0000003203678674 in _int_free () from /lib64/libc.so.6
#1  0x00000036cd902dd0 in __env_region_detach (env=0xac66b0, infop=0xac6b78, destroy=<value optimized out>)
    at ../../env/env_region.c:1099
#2  0x00000036cd8b4217 in __mutex_env_refresh (env=0xac66b0) at ../../mutex/mut_region.c:275
#3  0x00000036cd90023b in __env_refresh (dbenv=0xac6010, orig_flags=0, rep_check=0)
    at ../../env/env_open.c:966
#4  0x00000036cd900524 in __env_close (dbenv=0xac6010, rep_check=0) at ../../env/env_open.c:736
#5  0x00000036cd90073a in __env_close_pp (dbenv=0xac6010, flags=<value optimized out>)
    at ../../env/env_open.c:695
#6  0x0000000000400b58 in env_close () at test.c:71
#7  0x0000000000400ea8 in main () at test.c:152
(gdb) quit
Comment 22 RHEL Program Management 2014-07-28 12:45:45 UTC 
Development Management has reviewed and declined this request.
You may appeal this decision by reopening this request.
Comment 24 Honza Horak 2014-07-28 12:53:37 UTC 
Let's keep this bug opened since there indeed is an issue, we only do not have a patch yet. Also recovering the need info for the reporter as per comment #12.
Comment 27 Honza Horak 2015-10-14 06:32:17 UTC 
Since there has been no further input given and we're not able to fix the bug with the current information provided, closing the bug. Please, re-open in case there is some additional information that we can use to fix the issue.
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