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Hello Howard, Please accept my apologies, the issue was not related to LMDB. There have been a data race in my code that was only triggered by fast writes. Sorry for late answer, - your e-mail landed into the spam-folder, and I just found it.
With best regards, Pavel.
2015-04-16 8:04 GMT+06:00 Howard Chu hyc@symas.com:
pk@dbic.pro wrote:
Full_Name: Pavel Kraynyukhov Version: only LMDB from git and lmdb-0.9.14 OS: Gentoo Linux URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (37.99.47.171)
Hello there, I have ran into an issue with LMDB, which I can reproduce at will, but it seems a specific one. The git commit is 3368d1f5e243225cba4d730fba19ff600798ebe3 And this commit and my issue seems to be related.
- I use MDB_NOTLS flag on environment open.
- if I use MDB_NOSYNC flag for LMDB environment, the writer thread is
stuck after several transactions (writer thread backtrace):
P.S. tested against system provided lmdb version 0.9.14 and result is the
same. So this maybe not related to latest commit in git.
If you're having this problem in 0.9.14 then it is certainly not related to 3368d1f5e243225cba4d730fba19ff600798ebe3.
You confirm that the issue does not occur in 0.9.13? Can you upload a test case demonstrating the problem?
-- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/
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<div dir=3D"ltr"><div><div><div><div>Hello Howard,<br></div>Please accept m= y apologies, the issue was not related to LMDB. There have been a data race= in my code that was only triggered by fast writes.<br></div>Sorry for late= answer, - your e-mail landed into the spam-folder, and I just found it.<br=
<br></div>With best regards,<br></div>Pavel.<br><div><div><div><div><div c=
lass=3D"gmail_extra"><br><div class=3D"gmail_quote">2015-04-16 8:04 GMT+06:= 00 Howard Chu <span dir=3D"ltr"><<a href=3D"mailto:hyc@symas.com" target= =3D"_blank">hyc@symas.com</a>></span>:<br><blockquote class=3D"gmail_quo= te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"=
<a href=3D"mailto:pk@dbic.pro" target=3D"_blank">pk@dbic.pro</a> wrote:<br=
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"> Full_Name: Pavel Kraynyukhov<br> Version: only LMDB from git and lmdb-0.9.14<br> OS: Gentoo Linux<br> URL: <a href=3D"ftp://ftp.openldap.org/incoming/" target=3D"_blank">ftp://f= tp.openldap.org/incoming/</a><br> Submission from: (NULL) (37.99.47.171)<br> <br> <br> Hello there, I have ran into an issue with LMDB, which I can reproduce at w= ill,<br> but it seems a specific one. The git commit is<br> 3368d1f5e243225cba4d730fba19ff600798ebe3<br> And this commit and my issue seems to be related.<br> <br> 1. I use MDB_NOTLS flag on environment open.<br> 2. if=C2=A0 I use MDB_NOSYNC flag for LMDB environment, the writer thread i= s stuck<br> after several transactions (writer thread backtrace):<br> </blockquote> <br> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"> P.S. tested against system provided lmdb version 0.9.14 and result is the s= ame.<br> So this maybe not related to latest commit in git.<br> </blockquote> <br> If you're having this problem in 0.9.14 then it is certainly not relate= d to 3368d1f5e243225cba4d730fba19ff600798ebe3.<br> <br> You confirm that the issue does not occur in 0.9.13? Can you upload a test = case demonstrating the problem?<span class=3D"HOEnZb"><font color=3D"#88888= 8"><br> <br> -- <br> =C2=A0 -- Howard Chu<br> =C2=A0 CTO, Symas Corp.=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0<a href=3D"= http://www.symas.com" target=3D"_blank">http://www.symas.com</a><br> =C2=A0 Director, Highland Sun=C2=A0 =C2=A0 =C2=A0<a href=3D"http://highland= sun.com/hyc/" target=3D"_blank">http://highlandsun.com/hyc/</a><br> =C2=A0 Chief Architect, OpenLDAP=C2=A0 <a href=3D"http://www.openldap.org/p= roject/" target=3D"_blank">http://www.openldap.org/project/</a><br> </font></span></blockquote></div><br><br></div></div></div></div></div></di= v>
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pk＠dbic.pro