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Date: Mon, 3 Aug 2009 15:42:47 -0700 (PDT)
From: Madhuri Patwardhan <madhuri_patwardhan@yahoo.com>
Subject: what exactly happens when timeouts are set and tomcat has outofmemory
 errors.
To: Tomcat Users List <users@tomcat.apache.org>, aw@ice-sa.com
In-Reply-To: <722546.24516.qm@web52602.mail.re2.yahoo.com>
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Hi,=0A=0ACan somebody go over the details of what exactly happens when tomc=
at instance has outOfmemory errors and there are following timeouts set in =
a loadbalancer worker config. =0A=0AThis is my understanding.=0A=0Aping_mod=
e=3DA, ping_timeout=3D10000, reply_timeout=3D60000 and recorver_options=3D3=
=0A=0AIf the timeouts are set as above then CPing/Cpong test for connect an=
d prepost will work. When a new real request is sent to this tomcat instanc=
e, it should hit reply_timeout because it has outofmemory errors. Then depe=
nding on no. of retries set (it is default, for me so 2), this instance wil=
l be tried once again. Second time also it should not get reply within repl=
y_timeout and at that point it should be marked in "ERR" state. =0AHowever,=
 I don't see that. I don't see it being marked in "ERR" state. The state is=
 still "OK" inspite of this tomcat instance having outofmemory errors. Coul=
d somebody explain what am I missing?=0A=0AAlso, what does recorvery option=
 mean in this case? Is it possible to explain what happens when I set recov=
ery options? what happens when I set it to 3? What will happen if I set it =
to 7?=0A=0AI am really hoping to get more understanding of how this works.=
=0A=0AThanks,=0AMadhuri=0A=0A--- On Mon, 8/3/09, Madhuri Patwardhan <madhur=
i_patwardhan@yahoo.com> wrote:=0A=0A> From: Madhuri Patwardhan <madhuri_pat=
wardhan@yahoo.com>=0A> Subject: Re: after setting timeouts got puzzling res=
ults=0A> To: "Tomcat Users List" <users@tomcat.apache.org>, aw@ice-sa.com=
=0A> Date: Monday, August 3, 2009, 6:12 PM=0A> =0A> Hi,=0A> =0A> I am using=
 apache 2.2.11 and mod_jk 1.2.28 and tomcat=0A> version 5.5.27 and 5.5.20=
=0A> =0A> Thanks,=0A> Madhuri=0A> =0A> --- On Mon, 8/3/09, Andr=E9 Warnier =
<aw@ice-sa.com>=0A> wrote:=0A> =0A> > From: Andr=E9 Warnier <aw@ice-sa.com>=
=0A> > Subject: Re: after setting timeouts got puzzling=0A> results=0A> > T=
o: "Tomcat Users List" <users@tomcat.apache.org>=0A> > Date: Monday, August=
 3, 2009, 1:48 PM=0A> > Madhuri Patwardhan wrote:=0A> > > Hi,=0A> > > =0A> =
> > We are running with apache loadbalancer and 19=0A> tomcat=0A> > workers=
 loadbalanced.=0A> > > I went through the timeout document and other=0A> > =
documents, and my apache access log in detail before=0A> > choosing the tim=
eout values. I am seeing a bit=0A> surprising=0A> > results after setting t=
imeouts.=0A> > > =0A> > > Earlier we did not have connect_timeout,=0A> > pr=
epost_timeout, reply_timeout, recovery_options and=0A> > ping_mode set. Aft=
er going through the documents and=0A> > analyzing our application logs for=
 timings I set the=0A> > following values.=0A> > > =0A> > > ping_mode =3D A=
=0A> > > reply_timeout=3D60000=0A> > > recorvery_options=3D3=0A> > > socket=
_connect_timeout=3D5000=0A> > > =0A> > > Ping_timeout is set to the default=
 value that is=0A> > 10000.=0A> > > =0A> > > I saw that one of the tomcat i=
nstances had out=0A> of=0A> > memory errors and loadbalacer still showed th=
at worker=0A> in=0A> > good state for 24 hours. I felt after setting these=
=0A> timeouts=0A> > infact it should have detected conditions like this=0A>=
 quickly.=0A> > What am I missing?=0A> > > =0A> > One thing that is missing=
 above, and would help=0A> someone to=0A> > answer, are the versions of Apa=
che, mod_jk and Tomcat=0A> you=0A> > are using.=0A> > (At least I suppose i=
t is mod_jk).=0A> > =0A> >=0A> --------------------------------------------=
-------------------------=0A> > To unsubscribe, e-mail: users-unsubscribe@t=
omcat.apache.org=0A> > For additional commands, e-mail: users-help@tomcat.a=
pache.org=0A> > =0A> > =0A> =0A> =0A> =0A> =0A> ---------------------------=
------------------------------------------=0A> To unsubscribe, e-mail: user=
s-unsubscribe@tomcat.apache.org=0A> For additional commands, e-mail: users-=
help@tomcat.apache.org=0A> =0A> =0A=0A=0A      

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