Date: Tue, 08 Dec 1998 13:50:21 -0800 From: Mahadevan Iyer <iyer@internetdevices.com> To: Nate Williams <nate@mt.sri.com> Cc: java-port@FreeBSD.ORG, freebsd-java@FreeBSD.ORG, saurabh@internetdevices.com, namit@internetdevices.com, iyer@internetdevices.com Subject: Possible Bug in JVM Garbage Collection of Threads Message-ID: <366D9F1D.29759389@internetdevices.com> References: <36381ADB.DCCDAB3D@internetdevices.com> <199811091741.KAA04801@mt.sri.com> <36472A9A.A1661625@internetdevices.com> <199811091759.KAA04986@mt.sri.com>
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Hello Nate,
here is another one. This one is pretty critical and any help will be
deeply appreciated
FreeBSD JVM version : 1.1.7
This code causes the Resident memory size of the java process to continously
grow
You can see this if you run "top" on freeBSD
It will eventually given an OutOfMemoryError
If you throw in the socket code, it will give a "recursive malloc()" error
To trigger this error there has to be a client that continuously tries to
connect to the server
This problem seems to be an result of the previous problem, however this
causes our server to die.
I ran this using a SUN JVM on Solaris without any problems
-----------------------------------------TSock.java
----------------------------------
import java.net.*;
import java.io.*;
public class TSock {
public static void main(String[] args) throws Exception {
/* Required to trigger recursive malloc error after OutOfMemory
condition
ServerSocket server = new ServerSocket(9090);
*/
while(true) {
Thread t = new Thread();
t.start();
t.stop();
System.gc();
System.runFinalization();
/* Triggers recursive malloc error after OutOfMemory condition
Need to have a client that tries to continously connect to it
try {
Socket s = server.accept();
s.close();
}
catch(Exception e) {
}
*/
}
}
}
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