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Re: (ITS#7844) LMDB Delete Cursor inconsistencies

--537675cf_2ae8944a_1704c
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When I run the attached test case on my machine, I=E2=80=99m hitting the =
failing case.

Here is the test output:=C2=A0https://gist.github.com/armon/e529d7909fe30=
1126fc6

My steps:
=24 clang 7844.c mdb.c midl.c
=24 mkdir testdb
=24 ./a.out

=24 clang -v
Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
Target: x86=5F64-apple-darwin13.1.0
Thread model: posix

=24 uname -a
Darwin Armons-MacBook-Air.local 13.1.0 Darwin Kernel Version 13.1.0: Thu =
Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20=7E2/RELEASE=5FX86=5F64 x86=5F=
64

Best Regards,
Armon Dadgar

=46rom:=C2=A0Howard Chu hyc=40symas.com
Reply:=C2=A0Howard Chu hyc=40symas.com
Date:=C2=A0May 16, 2014 at 11:06:49 AM
To:=C2=A0armon.dadgar=40gmail.com armon.dadgar=40gmail.com, openldap-its=40=
openldap.org openldap-its=40openldap.org
Subject:=C2=A0 Re: (ITS=237844) LMDB Delete Cursor inconsistencies =20

armon.dadgar=40gmail.com wrote: =20
> --5372ac85=5F8edbdab=5F1271 =20
> Content-Type: text/plain; charset=3D=22utf-8=22 =20
> Content-Transfer-Encoding: quoted-printable =20
> Content-Disposition: inline =20
> =20
> =3D46or now, we have application code to retry the delete until no furt=
her =3D =20
> rows are removed. =20
> Still, it would be nice to have this resolved (and tested) in master=3D=
21 =20

Unable to reproduce the issue. I've attached my test program based on you=
r =20
description. =20

-- =20
-- Howard Chu =20
CTO, Symas Corp. http://www.symas.com =20
Director, Highland Sun http://highlandsun.com/hyc/ =20
Chief Architect, OpenLDAP http://www.openldap.org/project/ =20

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<html><head><style>body=7Bfont-family:Helvetica,Arial;font-size:13px=7D</=
style></head><body style=3D=22word-wrap: break-word; -webkit-nbsp-mode: s=
pace; -webkit-line-break: after-white-space;=22><div id=3D=22bloop=5Fcust=
omfont=22 style=3D=22font-family:Helvetica,Arial;font-size:13px; color: r=
gba(0,0,0,1.0); margin: 0px; line-height: auto;=22>When I run the attache=
d test case on my machine, I=E2=80=99m hitting the failing case.</div><di=
v id=3D=22bloop=5Fcustomfont=22 style=3D=22font-family:Helvetica,Arial;fo=
nt-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;=22>=
<br></div><div id=3D=22bloop=5Fcustomfont=22 style=3D=22font-family:Helve=
tica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-heig=
ht: auto;=22>Here is the test output:&nbsp;https://gist.github.com/armon/=
e529d7909fe301126fc6</div><div id=3D=22bloop=5Fcustomfont=22 style=3D=22f=
ont-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin=
: 0px; line-height: auto;=22><br></div><div id=3D=22bloop=5Fcustomfont=22=
 style=3D=22font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0=
,1.0); margin: 0px; line-height: auto;=22>My steps:</div><div id=3D=22blo=
op=5Fcustomfont=22 style=3D=22font-family:Helvetica,Arial;font-size:13px;=
 color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;=22>=24 clang 784=
4.c mdb.c midl.c</div><div id=3D=22bloop=5Fcustomfont=22 style=3D=22font-=
family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0p=
x; line-height: auto;=22>=24 mkdir testdb</div><div id=3D=22bloop=5Fcusto=
mfont=22 style=3D=22font-family:Helvetica,Arial;font-size:13px; color: rg=
ba(0,0,0,1.0); margin: 0px; line-height: auto;=22>=24 ./a.out</div><div i=
d=3D=22bloop=5Fcustomfont=22 style=3D=22font-family:Helvetica,Arial;font-=
size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;=22><br=
></div><div id=3D=22bloop=5Fcustomfont=22 style=3D=22font-family:Helvetic=
a,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height:=
 auto;=22><div id=3D=22bloop=5Fcustomfont=22 style=3D=22margin: 0px;=22>=24=
 clang -v</div><div id=3D=22bloop=5Fcustomfont=22 style=3D=22margin: 0px;=
=22>Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)</div><=
div id=3D=22bloop=5Fcustomfont=22 style=3D=22margin: 0px;=22>Target: x86=5F=
64-apple-darwin13.1.0</div><div id=3D=22bloop=5Fcustomfont=22 style=3D=22=
margin: 0px;=22>Thread model: posix</div><div id=3D=22bloop=5Fcustomfont=22=
 style=3D=22margin: 0px;=22><br></div><div id=3D=22bloop=5Fcustomfont=22 =
style=3D=22margin: 0px;=22><div id=3D=22bloop=5Fcustomfont=22 style=3D=22=
margin: 0px;=22>=24 uname -a</div><div id=3D=22bloop=5Fcustomfont=22 styl=
e=3D=22margin: 0px;=22>Darwin Armons-MacBook-Air.local 13.1.0 Darwin Kern=
el Version 13.1.0: Thu Jan 16 19:40:37 PST 2014; root:xnu-2422.90.20=7E2/=
RELEASE=5FX86=5F64 x86=5F64</div></div></div><div id=3D=22bloop=5Fcustomf=
ont=22 style=3D=22font-family:Helvetica,Arial;font-size:13px; color: rgba=
(0,0,0,1.0); margin: 0px; line-height: auto;=22><br></div> <div id=3D=22b=
loop=5Fsign=5F1400272071967389952=22 class=3D=22bloop=5Fsign=22><div styl=
e=3D=22font-family:helvetica,arial;font-size:13px=22>Best Regards,</div><=
div style=3D=22font-family:helvetica,arial;font-size:13px=22>Armon Dadgar=
<br></div></div> <div style=3D=22color:black=22><br>=46rom:&nbsp;<span st=
yle=3D=22color:black=22>Howard Chu</span> <a href=3D=22mailto:hyc=40symas=
.com=22>hyc=40symas.com</a><br>Reply:&nbsp;<span style=3D=22color:black=22=
>Howard Chu</span> <a href=3D=22mailto:hyc=40symas.com=22>hyc=40symas.com=
</a><br>Date:&nbsp;<span style=3D=22color:black=22>May 16, 2014 at 11:06:=
49 AM</span><br>To:&nbsp;<span style=3D=22color:black=22>armon.dadgar=40g=
mail.com</span> <a href=3D=22mailto:armon.dadgar=40gmail.com=22>armon.dad=
gar=40gmail.com</a>, <span style=3D=22color:black=22>openldap-its=40openl=
dap.org</span> <a href=3D=22mailto:openldap-its=40openldap.org=22>openlda=
p-its=40openldap.org</a><br>Subject:&nbsp;<span style=3D=22color:black=22=
> Re: (ITS=237844) LMDB Delete Cursor inconsistencies <br></span></div><b=
r> <blockquote type=3D=22cite=22 class=3D=22clean=5Fbq=22><span><div><div=
></div><div>armon.dadgar=40gmail.com wrote:
<br>&gt; --5372ac85=5F8edbdab=5F1271
<br>&gt; Content-Type: text/plain; charset=3D=22utf-8=22
<br>&gt; Content-Transfer-Encoding: quoted-printable
<br>&gt; Content-Disposition: inline
<br>&gt;
<br>&gt; =3D46or now, we have application code to retry the delete until =
no further =3D
<br>&gt; rows are removed.
<br>&gt; Still, it would be nice to have this resolved (and tested) in ma=
ster=3D21
<br>
<br>Unable to reproduce the issue. I've attached my test program based on=
 your =20
<br>description.
<br>
<br>-- =20
<br>   -- Howard Chu
<br>   CTO, Symas Corp.           http://www.symas.com
<br>   Director, Highland Sun     http://highlandsun.com/hyc/
<br>   Chief Architect, OpenLDAP  http://www.openldap.org/project/
<br><hr></div></div></span></blockquote></body></html>
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