Very Computer

Hello!

I'm using Tomcat to run my servlets.

In my servlet , I create class - Listenner ( Thread subclass ) -
that open ServerSocket  and listens to requests in the :
while( true )
{
        connection = listenSocket.accept();
        // When accepts the applet request opens another thread
to talk with it.
        AppletsHandlerServer handleServer = new
AppletsHandlerServer( connection ,dbClient );
        handleServer.start();

Quote:}

loop , then it create another class - Handler ( Thread
subclass ) that will talk with the clients.
The Listenner class also open JDBC connection to the Oracle and
then gives it to the Handler

My problem is that after some time that my servlet is running ,
and it can be 20 minutes up to 20 hours  , my servlet got
folowwing exception:
 java.lang.OutOfMemoryError
        at java.lang.Thread.start(Native Method)
        at
org.apache.tomcat.service.SimpleTcpEndpoint.processSocket
(SimpleTcpEn
dpoint.java:239)
        at
org.apache.tomcat.service.SimpleTcpEndpoint.acceptConnections
(SimpleT
cpEndpoint.java:250)
        at org.apache.tomcat.service.TcpListenerThread.run
(SimpleTcpEndpoint.jav
a:319)
        at java.lang.Thread.run(Unknown Source)
Endpoint ServerSocket
[addr=0.0.0.0/0.0.0.0,port=0,localport=8080] shutdown due t
o exception: java.lang.OutOfMemoryError

and then it crashs absolutely , so even all my computer
freezes , it also prints  following message:
#
# An EXCEPTION_STACK_OVERFLOW exception has been detected in
native code outside
 the VM.
# Program counter=0x5025c2c7
#

I need urgent help.
Do you think it is my bug or may be something else.
Thanks.Victor.

Vitaliy,

Something wrong with memory management. Is there any
special reasons for managing your Sockets, Listeners and
Helpers? Why you need Tomcat here? To avoid memory leak,
you have to revise all resources managing policy, closing
unnecessary threads, connections and so on.

Profiling tools or jvm profiling would be useful.

AlexV

Quote:> Hello!

> I'm using Tomcat to run my servlets.

> In my servlet , I create class - Listenner ( Thread subclass ) -
> that open ServerSocket  and listens to requests in the :
> while( true )
> {
> connection = listenSocket.accept();
> // When accepts the applet request opens another thread
> to talk with it.
> AppletsHandlerServer handleServer = new
> AppletsHandlerServer( connection ,dbClient );
> handleServer.start();
> }

> loop , then it create another class - Handler ( Thread
> subclass ) that will talk with the clients.
> The Listenner class also open JDBC connection to the Oracle and
> then gives it to the Handler

> My problem is that after some time that my servlet is running ,
> and it can be 20 minutes up to 20 hours  , my servlet got
> folowwing exception:
>  java.lang.OutOfMemoryError
>         at java.lang.Thread.start(Native Method)
>         at
> org.apache.tomcat.service.SimpleTcpEndpoint.processSocket
> (SimpleTcpEn
> dpoint.java:239)
>         at
> org.apache.tomcat.service.SimpleTcpEndpoint.acceptConnections
> (SimpleT
> cpEndpoint.java:250)
>         at org.apache.tomcat.service.TcpListenerThread.run
> (SimpleTcpEndpoint.jav
> a:319)
>         at java.lang.Thread.run(Unknown Source)
> Endpoint ServerSocket
> [addr=0.0.0.0/0.0.0.0,port=0,localport=8080] shutdown due t
> o exception: java.lang.OutOfMemoryError

> and then it crashs absolutely , so even all my computer
> freezes , it also prints  following message:
> #
> # An EXCEPTION_STACK_OVERFLOW exception has been detected in
> native code outside
>  the VM.
> # Program counter=0x5025c2c7
> #

> I need urgent help.
> Do you think it is my bug or may be something else.
> Thanks.Victor.