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From: Bernhard Slominski <bernhard.slominski@zooplus.com>
To: 'Tomcat Users List' <tomcat-user@jakarta.apache.org>
Subject: AW: jspServlet runs out of memory while compiling some jsp files
	using fork=true
Date: Fri, 27 May 2005 15:02:28 +0200
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Hi,

I think it happens randomly because it depends on the actual load on =
the
server.
Where there is not much traffic it's OK, but with more traffic the =
server
runs out of memomry.
I see your point that you cannot "control" the webmasters.
But still with the problems you have and the obvious very big =
application
with 10000 lines in a JSP (this must we a horror to maintain the code) =
and
hundreds of jars you should have a proper deployment process and not =
just
copying JSPs across.
It does not mean that it's more complicated, I implemented this in my
company with an ant script and it's really simple, stable and secure. =
Nobody
want's to go back to the old copy "solution".

Cheers

Bernhard

> -----Urspr=FCngliche Nachricht-----
> Von: Vesa Varimo [mailto:vesa.varimo@jippii.com]
> Gesendet: Freitag, 27. Mai 2005 14:59
> An: Tomcat Users List
> Betreff: Re: jspServlet runs out of memory while compiling some jsp
> files using fork=3Dtrue
>=20
>=20
>=20
> Hi,
>=20
> no the webapp is running whole time without redeployments.
> The jsp pages are quite large, 5000-10000 rows and there are=20
> many of them.=20
> Can this affect to memory usage of javac compiler?
> This is a strange problem, because sometimes these same pages=20
> compile just=20
> fine, sometimes they don't.
>=20
>=20
> Thx,
>=20
> Vesa
>=20
> ----- Original Message -----=20
> From: "Steve Kirk" <tomcat-user@web-startup.co.uk>
> To: "'Tomcat Users List'" <tomcat-user@jakarta.apache.org>
> Sent: Friday, May 27, 2005 3:32 PM
> Subject: RE: jspServlet runs out of memory while compiling=20
> some jsp files=20
> using fork=3Dtrue
>=20
>=20
> Is the problem caused because you redeploy the whole webapp each =
time?
> Could you just deploy only those files that have changed?  I=20
> can't imagine
> that this leads to overloading unless the numbers are massive...?
>=20
> > -----Original Message-----
> > From: Vesa Varimo [mailto:vesa.varimo@jippii.com]
> > Sent: Friday 27 May 2005 13:34
> > To: Tomcat Users List
> > Subject: Re: jspServlet runs out of memory while compiling
> > some jsp files using fork=3Dtrue
> >
> >
> >
> > Yes, that would be one solution, but not suitable for our
> > case because our
> > webmasters are constantly updating jsp pages on our
> > production servers.
> > Btw. I'm using tomcat 5.0.28.
> >
> > Thx,
> >
> > Vesa
> >
> > ----- Original Message -----=20
> > From: "Bernhard Slominski" <bernhard.slominski@zooplus.com>
> > To: "'Tomcat Users List'" <tomcat-user@jakarta.apache.org>
> > Sent: Friday, May 27, 2005 3:25 PM
> > Subject: AW: jspServlet runs out of memory while compiling
> > some jsp files
> > using fork=3Dtrue
> >
> >
> > Hi,
> >
> > I would suggest that you do a precompilation of your jsps on
> > a deployment
> > machine which is separate from the live machine.
> > So your compilation is not done on the live server, which
> > might be on heavy
> > load.
> > Also you don't have the problem that the first visitor has to
> > wait an awful
> > long time until the page get's displayed.
> >
> > Cheers
> >
> > Bernhard
> >
> > > -----Urspr=FCngliche Nachricht-----
> > > Von: Vesa Varimo [mailto:vesa.varimo@jippii.com]
> > > Gesendet: Freitag, 27. Mai 2005 12:45
> > > An: tomcat-user@jakarta.apache.org
> > > Betreff: jspServlet runs out of memory while compiling some
> > jsp files
> > > using fork=3Dtrue
> > >
> > >
> > > Hi,
> > >
> > > I'm having OutOfMemory error while Tomcat tries to compile
> > > jsp files. The problem occures few times in day so it's quite
> > > hard to repeat.
> > > Tomcat is configured to run javac in separate JVM with
> > > fork=3Dtrue option. I tried to give more memory for ant using
> > > ANT_OPTS, but it didn't help.
> > > I read source code for the jasper compiler and there are
> > > variables that configure how much memory is given to ant, but
> > > I'm not able to configure them
> > > with jspServlet init parameters.
> > >
> > > How should I resolved this? Is the Jikes compiler a solution
> > > worth of trying?
> > >
> > > Stacktrace included below. I have hundreds of jars in
> > > classpath... so I can't paste the whole compiler output.
> > >
> > > BR,
> > >
> > > Vesa Varimo
> > > vesa.varimo@jippii.com
> > >
> > > --------------------------------------------------------------
> > > ------------------
> > >
> > > 2005-05-26 21:42:53 StandardWrapperValve[jsp]:
> > > Servlet.service() for servlet jsp threw exception
> > > java.lang.OutOfMemoryError
> > >
> > > May 7, 2005 12:21:42 PM org.apache.jasper.compiler.Compiler
> > > generateClass
> > > SEVERE: Javac exception
> > > Compile failed; see the compiler error output for details.
> > >         at
> > org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:944)
> > >         at
> > org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:764)
> > >         at
> > >=20
> org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:379)
> > >         at
> > > org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
> > >         at
> > > org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
> > >         at
> > > org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
> > >         at
> > > org.apache.jasper.JspCompilationContext.compile(JspCompilation
> > > Context.java:511)
> > >         at
> > > org.apache.jasper.servlet.JspServletWrapper.service(JspServlet
> > > Wrapper.java:295)
> > >         at
> > > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet
> > > .java:292)
> > >         at
> > > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
> > >         at
> > > javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> > >         at
> > > org.apache.catalina.core.ApplicationFilterChain.internalDoFilt
> > > er(ApplicationFilterChain.java:237)
> > >         at
> > > org.apache.catalina.core.ApplicationFilterChain.doFilter(Appli
> > > cationFilterChain.java:157)
> > >         at
> > > org.apache.catalina.core.StandardWrapperValve.invoke(StandardW
> > > rapperValve.java:214)
> > >
> >
> >=20
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> >=20
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>=20
>=20
>=20
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