Re: [uml-user] Apache2/Tomcat5 in a 2.6.x host/client

[Peter <pe...@ri...>]

Hi Jay.  I host a lot of customers running Tomcat on their VPS.  That =
signal 11 can indicate an out of memory error (on the VPS).  So check =
you have started Tomcat with a -Xmx setting of something reasonable =
(e.g. -Xmx128m).  Otherwise Java will consume all the memory on the UML =
instance (presuming smaller than 512MB or so).

Also, you may want to try a 2.4 UML kernel for Java users.  I've had =
some better luck with that in some cases than a 2.6 one.

Regards, Peter
----- Original Message -----=20
> Good evening,
>=20
> First of all; I was wondering if anyone has had any luck running =
apache2=20
> and tomcat5 in a virtual machine.
>=20
> If not, has anyone else experianced problems with java networking=20
> applications?  I've got my configuration running and everything tests=20
> fine, but after a load test with between 300 - 500 connections, tomcat =

> pukes.  I get an exception that starts like this:
>=20
>=20
> An unexpected exception has been detected in native code outside the =
VM.
> Unexpected Signal : 11 occurred at PC=3D0x40023E9E
> Function=3D(null)+0x40023E9E
> Library=3D/lib/libpthread.so.0
>=20
> NOTE: We are unable to locate the function name symbol for the error
>       just occurred. Please refer to release documentation for =
possible
>       reason and solutions.
>=20
>=20
> Current Java thread:
>         at java.net.PlainSocketImpl.socketAccept(Native Method)
>         at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
>         - locked <0x44f3b700> (a java.net.PlainSocketImpl)
>         at java.net.ServerSocket.implAccept(ServerSocket.java:448)
>         at java.net.ServerSocket.accept(ServerSocket.java:419)
> ...
>=20
>=20
>=20
> I've tried the same application in a none UML environment with no =
problems.  I've tried upgrading my UML to the most current 2.6.7.  I've =
tried both the Blackdown and Sun jvms.  I've even tried running my load =
test on a simple page that only displays the time.  All yeild the same =
results.
>=20
> I'm not sure what additional information might be helpful with =
figuring this out.  And other than this one problem, I love UML and have =
had pretty good results. =20
>=20
> Thanks in advance for any help that the list may be able to offer.
>=20
> --=20
>=20
> Jay Herrick