Applet Usage

Hi,
I'm new to Java Tech.
I'm very much confused with Applet...
I know that this is a basic q'n..still i'm not clear enough...
Applets are the programs which run on the clients side....
In which situations will i be using a applet...
can i use a JSP in the place of a Applet and give the data to the jSP Page....
Kindly anyone clear me the concepts of Applet..where it shud be used???in which situation???
Thanks,
Ram

As you said applets are the programs that run on the client side. Yes and there are certain limitations to it. Usually many browsers that may not support applets. Servlets is an optimum solution when you are working with a client-server application as servlet are very dynamic. Because servlets can also produce html with javascript set in.
Applets may give you a cosmetic graphic look. But they are poorly supported to my knowledge. And if you want to write an applet that communicates to a servlet. You need to do huge home work on that.
From Sun:
An applet is a program written in the Java programming language that can be included in an HTML page, much in the same way an image is included in a page. When you use a Java technology-enabled browser to view a page that contains an applet, the applet's code is transferred to your system and executed by the browser's Java Virtual Machine (JVM). For information and examples on how to include an applet in an HTML page, refer to this description of the <APPLET> tag.

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Hi all,
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machName portno port:127.0.0.1 2002 2002
found key for : alias
SunX509: skip default keystore: java.security.AccessControlException: access den
ied (java.util.PropertyPermission javax.net.ssl.trustStore read)
trigger seeding of SecureRandom
done seeding SecureRandom
Machine Name is 127.0.0.1
%% No cached client session
*** ClientHello, v3.1
RandomCookie: GMT: 1009970996 bytes = { 101, 168, 120, 86, 239, 175, 47, 195, 7
4, 19, 250, 73, 236, 219, 251, 102, 102, 151, 188, 95, 121, 105, 96, 173, 182, 3
3, 212, 30 }
Session ID: {}
Cipher Suites: { 0, 9 }
Compression Methods: { 0 }
[write] MD5 and SHA1 hashes: len = 45
0000: 01 00 00 29 03 01 3C 33 EF 34 65 A8 78 56 EF AF ...)..<3.4e.xV..
0010: 2F C3 4A 13 FA 49 EC DB FB 66 66 97 BC 5F 79 69 /.J..I...ff.._yi
0020: 60 AD B6 21 D4 1E 00 00 02 00 09 01 00 `..!.........
AWT-EventQueue-1, WRITE: SSL v3.1 Handshake, length = 45
[write] MD5 and SHA1 hashes: len = 47
0000: 01 03 01 00 06 00 00 00 20 00 00 09 06 00 40 3C ........ .....@<
0010: 33 EF 34 65 A8 78 56 EF AF 2F C3 4A 13 FA 49 EC 3.4e.xV../.J..I.
0020: DB FB 66 66 97 BC 5F 79 69 60 AD B6 21 D4 1E ..ff.._yi`..!..
AWT-EventQueue-1, WRITE: SSL v2, contentType = 22, translated length = 16340
AWT-EventQueue-1, READ: SSL v3.1 Handshake, length = 670
*** ServerHello, v3.1
RandomCookie: GMT: 1009970996 bytes = { 225, 193, 138, 42, 75, 55, 82, 98, 128,
65, 108, 86, 20, 94, 198, 33, 33, 115, 40, 27, 29, 0, 117, 169, 21, 60, 48, 113
Session ID: {60, 51, 239, 52, 239, 124, 121, 133, 111, 116, 246, 8, 10, 20, 99,
150, 141, 208, 153, 124, 223, 176, 115, 34, 158, 29, 153, 32, 194, 198, 217, 12
6}
Cipher Suite: { 0, 9 }
Compression Method: 0
%% Created: [Session-1, SSL_RSA_WITH_DES_CBC_SHA]
** SSL_RSA_WITH_DES_CBC_SHA
[read] MD5 and SHA1 hashes: len = 74
0000: 02 00 00 46 03 01 3C 33 EF 34 E1 C1 8A 2A 4B 37 ...F..<3.4...*K7
0010: 52 62 80 41 6C 56 14 5E C6 21 21 73 28 1B 1D 00 Rb.AlV.^.!!s(...
0020: 75 A9 15 3C 30 71 20 3C 33 EF 34 EF 7C 79 85 6F u..<0q <3.4..y.o
0030: 74 F6 08 0A 14 63 96 8D D0 99 7C DF B0 73 22 9E t....c.......s".
0040: 1D 99 20 C2 C6 D9 7E 00 09 00 .. .......
*** Certificate chain
chain [0] = [
Version: V1
Subject: CN=prasadv, OU=nms, O=mindtree, L=bangalore, ST=karnataka, C=IN
Signature Algorithm: MD5withRSA, OID = 1.2.840.113549.1.1.4
Key: com.sun.net.ssl.internal.ssl.JSA_RSAPublicKey@479809
Validity: [From: Wed Jan 02 14:46:52 GMT+05:30 2002,
               To: Thu Jan 02 14:46:52 GMT+05:30 2003]
Issuer: CN=prasadv, OU=nms, O=mindtree, L=bangalore, ST=karnataka, C=IN
SerialNumber: [    3c32d004 ]
Algorithm: [MD5withRSA]
Signature:
0000: 71 00 A6 5A 95 8D 02 1F FD DF 51 55 73 14 59 C2 q..Z......QUs.Y.
0010: 51 40 D5 38 BE 0C 52 17 44 01 CC 6B 72 05 69 94 [email protected].
0020: 9E 01 2D C5 E4 FF D9 B6 73 8F 0C 84 6F 2A 4B A4 ..-.....s...o*K.
0030: 42 B7 EE E2 B2 32 A6 64 28 6B A2 F1 91 A8 D2 36 B....2.d(k.....6
0040: 09 E8 50 72 1F 25 77 B5 0D 92 48 96 87 EE 76 AF ..Pr.%w...H...v.
0050: 67 FD BF 7F 77 35 36 2F F2 2F 2D 9E 1F 2C F2 8C g...w56/./-..,..
0060: BF B6 44 9F 49 EE E8 E3 13 ED EC 3D 17 1B EC 28 ..D.I......=...(
0070: 6A 37 36 37 BC C3 36 3F 76 22 FF 1C 02 AB 90 0A j767..6?v"......
AWT-EventQueue-1, SEND SSL v3.1 ALERT: fatal, description = certificate_unknown
AWT-EventQueue-1, WRITE: SSL v3.1 Alert, length = 2
IO exceptionuntrusted server cert chain
Exception occurred during event dispatching:
java.security.AccessControlException: access denied (java.lang.RuntimePermission
exitVM)
at java.security.AccessControlContext.checkPermission(AccessControlConte
xt.java:272)
at java.security.AccessController.checkPermission(AccessController.java:
399)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:545)
at java.lang.SecurityManager.checkExit(SecurityManager.java:765)
at java.lang.Runtime.exit(Runtime.java:91)
at java.lang.System.exit(System.java:701)
at Connection.<init>(Connection.java:94)
at Main$2.actionPerformed(Main.java:373)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:14
50)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Abstra
ctButton.java:1504)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:378)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:250
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:216)
at java.awt.Component.processMouseEvent(Component.java:3717)
at java.awt.Component.processEvent(Component.java:3546)
at java.awt.Container.processEvent(Container.java:1164)
at java.awt.Component.dispatchEventImpl(Component.java:2595)
at java.awt.Container.dispatchEventImpl(Container.java:1213)
at java.awt.Component.dispatchEvent(Component.java:2499)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2451
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2216)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2125)
at java.awt.Container.dispatchEventImpl(Container.java:1200)
at java.awt.Window.dispatchEventImpl(Window.java:912)
at java.awt.Component.dispatchEvent(Component.java:2499)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:319)
at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:10
3)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.Dialog.show(Dialog.java:370)
at Main.validate(Main.java:434)
at Main$MenuItemListener.actionPerformed(Main.java:729)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:14
50)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Abstra
ctButton.java:1504)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:378)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:250
at javax.swing.AbstractButton.doClick(AbstractButton.java:279)
at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseRelease
d(BasicMenuItemUI.java:886)
at java.awt.Component.processMouseEvent(Component.java:3717)
at java.awt.Component.processEvent(Component.java:3546)
at java.awt.Container.processEvent(Container.java:1164)
at java.awt.Component.dispatchEventImpl(Component.java:2595)
at java.awt.Container.dispatchEventImpl(Container.java:1213)
at java.awt.Component.dispatchEvent(Component.java:2499)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:2451
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2216)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2125)
at java.awt.Container.dispatchEventImpl(Container.java:1200)
at java.awt.Component.dispatchEvent(Component.java:2499)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:319)
at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:10
3)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
errors at server side :
trustStore type is : jks
init truststore
adding private entry as trusted cert: [
Version: V1
Subject: CN=prasadv, OU=nms, O=mindtree, L=bangalore, ST=karnataka, C=IN
Signature Algorithm: MD5withRSA, OID = 1.2.840.113549.1.1.4
Key: com.sun.net.ssl.internal.ssl.JSA_RSAPublicKey@291aff
Validity: [From: Wed Jan 02 14:46:52 GMT+05:30 2002,
               To: Thu Jan 02 14:46:52 GMT+05:30 2003]
Issuer: CN=prasadv, OU=nms, O=mindtree, L=bangalore, ST=karnataka, C=IN
SerialNumber: [    3c32d004 ]
Algorithm: [MD5withRSA]
Signature:
0000: 71 00 A6 5A 95 8D 02 1F FD DF 51 55 73 14 59 C2 q..Z......QUs.Y.
0010: 51 40 D5 38 BE 0C 52 17 44 01 CC 6B 72 05 69 94 [email protected].
0020: 9E 01 2D C5 E4 FF D9 B6 73 8F 0C 84 6F 2A 4B A4 ..-.....s...o*K.
0030: 42 B7 EE E2 B2 32 A6 64 28 6B A2 F1 91 A8 D2 36 B....2.d(k.....6
0040: 09 E8 50 72 1F 25 77 B5 0D 92 48 96 87 EE 76 AF ..Pr.%w...H...v.
0050: 67 FD BF 7F 77 35 36 2F F2 2F 2D 9E 1F 2C F2 8C g...w56/./-..,..
0060: BF B6 44 9F 49 EE E8 E3 13 ED EC 3D 17 1B EC 28 ..D.I......=...(
0070: 6A 37 36 37 BC C3 36 3F 76 22 FF 1C 02 AB 90 0A j767..6?v"......
trigger seeding of SecureRandom
done seeding SecureRandom
Befotre main step
Waiting for request under port
matching server alias : alias
Finalizer, SEND SSL v3.1 ALERT: warning, description = close_notify
Finalizer, WRITE: SSL v3.1 Alert, length = 2
Waiting for request under port
[read] MD5 and SHA1 hashes: len = 3
0000: 01 03 01 ...
[read] MD5 and SHA1 hashes: len = 44
0000: 00 06 00 00 00 20 00 00 09 06 00 40 3C 33 EF 34 ..... .....@<3.4
0010: 65 A8 78 56 EF AF 2F C3 4A 13 FA 49 EC DB FB 66 e.xV../.J..I...f
0020: 66 97 BC 5F 79 69 60 AD B6 21 D4 1E f.._yi`..!..
Thread-0, READ: SSL v2, contentType = 22, translated length = 45
*** ClientHello, v3.1
RandomCookie: GMT: 1009970996 bytes = { 101, 168, 120, 86, 239, 175, 47, 195, 7
4, 19, 250, 73, 236, 219, 251, 102, 102, 151, 188, 95, 121, 105, 96, 173, 182, 3
3, 212, 30 }
Session ID: {}
Cipher Suites: { 0, 9 }
Compression Methods: { 0 }
%% Created: [Session-1, SSL_NULL_WITH_NULL_NULL]
*** ServerHello, v3.1
RandomCookie: GMT: 1009970996 bytes = { 225, 193, 138, 42, 75, 55, 82, 98, 128,
65, 108, 86, 20, 94, 198, 33, 33, 115, 40, 27, 29, 0, 117, 169, 21, 60, 48, 113
Session ID: {60, 51, 239, 52, 239, 124, 121, 133, 111, 116, 246, 8, 10, 20, 99,
150, 141, 208, 153, 124, 223, 176, 115, 34, 158, 29, 153, 32, 194, 198, 217, 12
6}
Cipher Suite: { 0, 9 }
Compression Method: 0
Cipher suite: SSL_RSA_WITH_DES_CBC_SHA
*** Certificate chain
chain [0] = [
Version: V1
Subject: CN=prasadv, OU=nms, O=mindtree, L=bangalore, ST=karnataka, C=IN
Signature Algorithm: MD5withRSA, OID = 1.2.840.113549.1.1.4
Key: com.sun.net.ssl.internal.ssl.JSA_RSAPublicKey@47c5fc
Validity: [From: Wed Jan 02 14:46:52 GMT+05:30 2002,
               To: Thu Jan 02 14:46:52 GMT+05:30 2003]
Issuer: CN=prasadv, OU=nms, O=mindtree, L=bangalore, ST=karnataka, C=IN
SerialNumber: [    3c32d004 ]
Algorithm: [MD5withRSA]
Signature:
0000: 71 00 A6 5A 95 8D 02 1F FD DF 51 55 73 14 59 C2 q..Z......QUs.Y.
0010: 51 40 D5 38 BE 0C 52 17 44 01 CC 6B 72 05 69 94 [email protected].
0020: 9E 01 2D C5 E4 FF D9 B6 73 8F 0C 84 6F 2A 4B A4 ..-.....s...o*K.
0030: 42 B7 EE E2 B2 32 A6 64 28 6B A2 F1 91 A8 D2 36 B....2.d(k.....6
0040: 09 E8 50 72 1F 25 77 B5 0D 92 48 96 87 EE 76 AF ..Pr.%w...H...v.
0050: 67 FD BF 7F 77 35 36 2F F2 2F 2D 9E 1F 2C F2 8C g...w56/./-..,..
0060: BF B6 44 9F 49 EE E8 E3 13 ED EC 3D 17 1B EC 28 ..D.I......=...(
0070: 6A 37 36 37 BC C3 36 3F 76 22 FF 1C 02 AB 90 0A j767..6?v"......
*** ServerHelloDone
[write] MD5 and SHA1 hashes: len = 670
0000: 02 00 00 46 03 01 3C 33 EF 34 E1 C1 8A 2A 4B 37 ...F..<3.4...*K7
0010: 52 62 80 41 6C 56 14 5E C6 21 21 73 28 1B 1D 00 Rb.AlV.^.!!s(...
0020: 75 A9 15 3C 30 71 20 3C 33 EF 34 EF 7C 79 85 6F u..<0q <3.4..y.o
0030: 74 F6 08 0A 14 63 96 8D D0 99 7C DF B0 73 22 9E t....c.......s".
0040: 1D 99 20 C2 C6 D9 7E 00 09 00 0B 00 02 4C 00 02 .. ..........L..
0050: 49 00 02 46 30 82 02 42 30 82 01 AB 02 04 3C 32 I..F0..B0.....<2
0060: D0 04 30 0D 06 09 2A 86 48 86 F7 0D 01 01 04 05 ..0...*.H.......
0070: 00 30 68 31 0B 30 09 06 03 55 04 06 13 02 49 4E .0h1.0...U....IN
0080: 31 12 30 10 06 03 55 04 08 13 09 6B 61 72 6E 61 1.0...U....karna
0090: 74 61 6B 61 31 12 30 10 06 03 55 04 07 13 09 62 taka1.0...U....b
00A0: 61 6E 67 61 6C 6F 72 65 31 11 30 0F 06 03 55 04 angalore1.0...U.
00B0: 0A 13 08 6D 69 6E 64 74 72 65 65 31 0C 30 0A 06 ...mindtree1.0..
00C0: 03 55 04 0B 13 03 6E 6D 73 31 10 30 0E 06 03 55 .U....nms1.0...U
00D0: 04 03 13 07 70 72 61 73 61 64 76 30 1E 17 0D 30 ....prasadv0...0
00E0: 32 30 31 30 32 30 39 31 36 35 32 5A 17 0D 30 33 20102091652Z..03
00F0: 30 31 30 32 30 39 31 36 35 32 5A 30 68 31 0B 30 0102091652Z0h1.0
0100: 09 06 03 55 04 06 13 02 49 4E 31 12 30 10 06 03 ...U....IN1.0...
0110: 55 04 08 13 09 6B 61 72 6E 61 74 61 6B 61 31 12 U....karnataka1.
0120: 30 10 06 03 55 04 07 13 09 62 61 6E 67 61 6C 6F 0...U....bangalo
0130: 72 65 31 11 30 0F 06 03 55 04 0A 13 08 6D 69 6E re1.0...U....min
0140: 64 74 72 65 65 31 0C 30 0A 06 03 55 04 0B 13 03 dtree1.0...U....
0150: 6E 6D 73 31 10 30 0E 06 03 55 04 03 13 07 70 72 nms1.0...U....pr
0160: 61 73 61 64 76 30 81 9F 30 0D 06 09 2A 86 48 86 asadv0..0...*.H.
0170: F7 0D 01 01 01 05 00 03 81 8D 00 30 81 89 02 81 ...........0....
0180: 81 00 D2 18 99 9D 29 35 BC 5F AB 80 0C 14 F2 19 ......)5._......
0190: 13 B4 27 28 B1 37 AC 8F 33 CE 2F 08 BF F0 8E 88 ..'(.7..3./.....
01A0: DA BA 40 4B 94 F6 CE CB F3 C9 79 1F 80 CD BA D9 [email protected].....
01B0: 3B 19 8C 70 37 CE E4 DD 49 C7 EF AA FC 30 87 78 ;..p7...I....0.x
01C0: BF D7 8A 68 CE 13 F2 56 8C 08 51 CB AE 17 B1 DC ...h...V..Q.....
01D0: 0B 40 E7 35 AC F6 57 16 A5 B1 AA DB 88 26 2E 6A [email protected]......&.j
01E0: 4A C7 83 45 7F 79 D2 9F 28 ED 54 28 B8 56 48 A1 J..E.y..(.T(.VH.
01F0: 0D 95 47 E0 1F DB 70 0B 38 CA E5 B7 A0 DC 3C 87 ..G...p.8.....<.
0200: BC 07 02 03 01 00 01 30 0D 06 09 2A 86 48 86 F7 .......0...*.H..
0210: 0D 01 01 04 05 00 03 81 81 00 71 00 A6 5A 95 8D ..........q..Z..
0220: 02 1F FD DF 51 55 73 14 59 C2 51 40 D5 38 BE 0C [email protected]..
0230: 52 17 44 01 CC 6B 72 05 69 94 9E 01 2D C5 E4 FF R.D..kr.i...-...
0240: D9 B6 73 8F 0C 84 6F 2A 4B A4 42 B7 EE E2 B2 32 ..s...o*K.B....2
0250: A6 64 28 6B A2 F1 91 A8 D2 36 09 E8 50 72 1F 25 .d(k.....6..Pr.%
0260: 77 B5 0D 92 48 96 87 EE 76 AF 67 FD BF 7F 77 35 w...H...v.g...w5
0270: 36 2F F2 2F 2D 9E 1F 2C F2 8C BF B6 44 9F 49 EE 6/./-..,....D.I.
0280: E8 E3 13 ED EC 3D 17 1B EC 28 6A 37 36 37 BC C3 .....=...(j767..
0290: 36 3F 76 22 FF 1C 02 AB 90 0A 0E 00 00 00 6?v"..........
Thread-0, WRITE: SSL v3.1 Handshake, length = 670
Thread-0, READ: SSL v3.1 Alert, length = 2
Thread-0, RECV SSLv3 ALERT: fatal, certificate_unknown
html file used at client side
<HTML>


<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 600 HEIGHT = 200 codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,0,0">
<PARAM NAME = CODE VALUE = Main>
<PARAM NAME = CODEBASE VALUE = . >
<PARAM NAME = machinename VALUE = "127.0.0.1" >
<PARAM NAME = port VALUE = "2002" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
<PARAM NAME="scriptable" VALUE="false">
</OBJECT>
</HTML>
Please help me to solve out this problem.
Thanks,
prasad.

Are u using MS JVM i.e default IE browser or you have installed the plug in?

Is this bad usage of the applet sound player

I have this class for playing audio for my application.
currently it is a game the is presented in a JFrame but when trying to play audio i kept coming across the use of java.applet.AudioClip for playing audio.
what i want to know is what i am doing really bad use of this class?
and if so where should i look to find tips on how to make a better audio class for my game?
import java.applet.AudioClip;
import java.applet.Applet;
public class SoundPlayer {
     public static final int WALL_HIT_SOUND = 1, BRICK_HIT_SOUND = 2, POWER_UP_SOUND = 3;
     private static boolean setUp = false;
     private static AudioClip wallHit = null, brickHit = null, powerUp = null;
     public void play(int clipID) {
          if (!setUp) {
               setUp();
          AudioClip clip;
          switch (clipID) {
               default:
               case WALL_HIT_SOUND:
                    clip = wallHit;
                    break;
               case BRICK_HIT_SOUND:
                    clip = brickHit;
                    break;
               case POWER_UP_SOUND:
                    clip = powerUp;
                    break;
          if (clip != null) {
               clip.play();
     public void setUp() {
          wallHit = loadClip("wallHit");
          brickHit = loadClip("brickHit");
          powerUp = loadClip("powerUp");
          setUp = true;
     public AudioClip loadClip(String name) {
          try {
               return Applet.newAudioClip(getClass().getResource("/sound/files/" + name + ".wav"));
          } catch (Exception e) {
               System.err.println("Cannot open Audio File: " + name + ".wav will not play this sound");
               return null;
}Thanks Scott.

To respond to your first question (Is it bad to use)
java.applet.AudioClip isn't part of the JavaSound API, so this isn't really the correct forum to ask this question.
You should go check out a generic applet forum for the question...
To respond to your second question (What should I use if it's bad)
javax.sound.sampled.Clip is probably what you should be using for an application to play short sounds.
/* To load a clip */
AudioInputStream ais = AudioSystem.getAudioInputStream(new File("bang.wav"));
Clip c = AudioSystem.getClip();
c.open(ais);
/* To play a clip */
c.start();
/* To stop */
c.stop();
/* To stop & reset to beginning */
c.stop();
c.setFramePosition(0);

Disco App Server high CPU usage, Disco Applet freezes, tuning possible?

Hi again,
so I am facing again a dramatic performance issue with our Discoverer.
I have a cross-table report with ten page items, one datapoint, a percentage calculation and a total.
After querying the data from the DB, building the report (calculating total and percentages) takes 50 seconds, Disco Applet is freezed, App Server shows high CPU load (one core about 60%, other three cores about 20%). The report fetches 5600 rows, which is quite nothing.
Disco Version: 10.1.2.54.25 (CPU IV).
Are there any parameters / settings on the application server to improve the performance at this place?
Thanks in advance,
Christian

I found the solution for this special problem: the total in the report was the cause. Without it, the report reacts as I expect it.
Nevertheless, other reports (approx. 300.000 rows of data in a crosstab) with four page items also cause this high CPU load on the AS and freeze Disco for some half a minute. Our costumers do complain about this as it always seems that Disco hung up.
Any suggestions on how to tune the AS?
Regards,
Christian

Applet CPU usage problem

Hi All,
I have a tcp/ip listener that is running in a thread that is munching 100% of cpu. I wait for data in an endless loop but in a thread this can't take 100% cpu...or can it?

If you check for data all the time, it can. If you tell the Thread to sleep for while between each check you'll use less resources.

Applet not getting loaded in Windows Vista's Mozilla Browser

Hi,
When I open the URL http://www.operamini.com/demo/ , the applet in that site gets loaded from windows XP and linux, but not from windows vista, for the same firefox version. When I refer the Java console I get the message lissted below.
c:   clear console window
f:   finalize objects on finalization queue
g:   garbage collect
h:   display this help message
l:   dump classloader list
m:   print memory usage
o:   trigger logging
p:   reload proxy configuration
q:   hide console
r:   reload policy configuration
s:   dump system and deployment properties
t:   dump thread list
v:   dump thread stack
x:   clear classloader cache
0-5: set trace level to <n>
load: class org.microemu.applet.Main not found.
java.lang.ClassNotFoundException: org.microemu.applet.Main
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)What can be the reason? what should be done to overcome this?Is it due to any version incompatibility of Java? I have no idea regarding this.
Please help
Rony

there are other issues as well - in Safari:
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/s.png] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/v] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)
attempt to load resource [/t] using System ClasslLoader from a.Code(Unknown Source)
       me2.o.a(null:-1)

Problem Launching Java Applet with Plug-in: Version 1.4.2_01

Hello out there:
I recently installed j2re-1.4.2_01 on my home computer but have been unable to access Web sites emmploying JAva applets. The following is an email exchange with Jeff Hall of Lowell Observatory, manager of an educational site hosted by Lowell, trying to resolve my problem. The messages are better understood if read in reverse order.
I'm hoping that someone will recognize the source of my problem and can recommmend a solution. I would appreciate any help offered.
Thanks,
Mike Coucke
Hi Jeff:
Well, I guess the problem lies with me somewhere. Here's my answer/status to your questions/suggestions:
1) I'm using MS Windows Me version 4.90.3000
2) I do have the directory C:\Windows\.jpi_cache\jar\, but the only thing in it is an empty folder labeled "1.0". The file LP.jar does not exist anywhere on my hard drive.
3) I tried several game sites that utilized Java applets and got the same results: the Java cup in the upper left corner followed a few seconds later by the red "X". So, evidently the problem is somewhere on my end.
I'm going to post our email exchanges in a Java Users Forum managed by Sun to see if anyone out there can solve my problem. However, if you have any more suggestions, I'll be glad to try them.
Thanks for the help.
Mike Coucke
[email protected]
----- Original Message -----
From: "Jeffrey Hall" <[email protected]>
To: "'Mike Coucke'" <[email protected]>
Sent: Friday, September 05, 2003 1:02 PM
Subject: RE: Registration with Lowell Education Online
Mike,
Rats! What version of Windows are you using? It's a little strange to
see the user directory set to C:\Windows; if you're using XP, I'd expect
it to be something like C:\Documents and Settings\Mike Coucke. In any
event, the output that is of concern is these two lines:
java.lang.ClassNotFoundException: LPRemote.class
Caused by: java.net.UnknownHostException: proxy
It looks like your browser is not finding our server's IP when it comes
time to download the necessary Java code.
LPRemote.class is the fundamental code that runs LOPARC, and your
browser should be downloading it automatically when you click connect.
LPRemote.class is stored along with a bunch of other classes in a file
called "LP.jar" that you download from our server. So, if you go to C:
in Windows Explorer and do a file search for LP.jar, you should find it.
On my machine, it's stored in a directory called ".jpi_cache\jar\" in my
user home directory. Let me know if you have this file, or the
jpi-cache directory.
One other thing you might try is going to a different site that you know
uses Java applets -- I think some of the online game rooms at Yahoo use
Java. See if other sites that use Java load correctly. Then we'll know
if it's our server specifically, or a more general problem on your end.
Jeff Hall
Lowell Observatory
Hello Jeff:
I still have the Java "blues". I followed your instructions, but am still unable to launch a LOPARC session. After an initial failure, I uninstalled all three Java versions I had (1.4.0, 1.4.1, 1.4.2), then reinstalled 1.4.2_01 from the Sun website.
Now, when I try to launch LOPARC, I initially get a blank window with the Java cup in the upper left corner. After about 20 seconds, the cup changes to a red "X". During those 20 seconds, the following appear in the IE message bar at the bottom of the window: "Applet LPRemote notinited" (their spelling) which changes to "Loading Java Applet Failed..." when the red "X" appears.
Following is a copy of the log from my Java Console during all of this:
Java(TM) Plug-in: Version 1.4.2_01
Using JRE version 1.4.2_01 Java HotSpot(TM) Client VM
User home directory = C:\WINDOWS
Proxy Configuration: Manual Configuration
Proxy: http=proxy,https=proxy,ftp=proxy,gopher=proxy
Proxy Overrides:
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class LPRemote.class not found.
java.lang.ClassNotFoundException: LPRemote.class
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.UnknownHostException: proxy
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.http.HttpClient.privilegedOpenServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.<init>(Unknown Source)
at sun.plugin.net.protocol.http.HttpClient.New(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.createConnection(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 10 more
I followed this up by executing the following three console commands:
"dump system properties"
"dump classholder list"
"dump thread list"
and obtained the following listings:
Dump system properties ...
acl.read = +
acl.read.default =
acl.write = +
acl.write.default =
application.home = C:\PROGRA~1\JAVA\J2RE14~1.2_0
awt.toolkit = sun.awt.windows.WToolkit
browser = sun.plugin
browser.vendor = Sun Microsystems, Inc.
browser.version = 1.1
deployment.javaws.cache.dir = C:\WINDOWS\.javaws\cache
deployment.javaws.jre.0.enabled = true
deployment.javaws.jre.0.location = http://java.sun.com/products/autodl/j2se
deployment.javaws.jre.0.osarch = x86
deployment.javaws.jre.0.osname = Windows
deployment.javaws.jre.0.path = C:\Program Files\Java\j2re1.4.2_01\bin\javaw.exe
deployment.javaws.jre.0.platform = 1.4
deployment.javaws.jre.0.product = 1.4.2_01
deployment.javaws.jre.0.registered = true
deployment.javaws.version = javaws-1.4.2_01
deployment.system.cacerts = C:\PROGRA~1\JAVA\J2RE14~1.2_0\lib\security\cacerts
deployment.system.home = C:\WINDOWS\Sun\Java\Deployment
deployment.system.jssecacerts = C:\PROGRA~1\JAVA\J2RE14~1.2_0\lib\security\cacerts
deployment.system.profile = C:\WINDOWS
deployment.system.security.policy = file:/C:/WINDOWS/Sun/Java/Deployment/security/java.policy
deployment.user.cachedir = C:\WINDOWS\Application Data\Sun\Java\Deployment\cache
deployment.user.certs = C:\WINDOWS\Application Data\Sun\Java\Deployment\security\deployment.certs
deployment.user.extdir = C:\WINDOWS\Application Data\Sun\Java\Deployment\ext
deployment.user.home = C:\WINDOWS\Application Data\Sun\Java\Deployment
deployment.user.jssecerts = C:\WINDOWS\Application Data\Sun\Java\Deployment\security\deployment.jssecerts
deployment.user.logdir = C:\WINDOWS\Application Data\Sun\Java\Deployment\log
deployment.user.profile = C:\WINDOWS\Application Data
deployment.user.security.policy = file:/C:/WINDOWS/Application%20Data/Sun/Java/Deployment/security/java.policy
deployment.user.tmpdir = C:\WINDOWS\Application Data\Sun\Java\Deployment\cache\tmp
file.encoding = Cp1252
file.encoding.pkg = sun.io
file.separator = \
file.separator.applet = true
http.agent = Mozilla/4.0 (Windows Me 4.90)
http.auth.serializeRequests = true
https.protocols = SSLv3,SSLv2Hello
java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironment
java.awt.printerjob = sun.awt.windows.WPrinterJob
java.class.path = C:\PROGRA~1\JAVA\J2RE14~1.2_0\classes
java.class.version = 48.0
java.class.version.applet = true
java.endorsed.dirs = C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\endorsed
java.ext.dirs = C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\ext
java.home = C:\PROGRA~1\JAVA\J2RE14~1.2_0
java.io.tmpdir = C:\WINDOWS\TEMP\
java.library.path = D:\PROGRAM FILES\INTERNET EXPLORER 6;.;C:\WINDOWS\SYSTEM;C:\WINDOWS;D:\PROGRA~1\INTERN~1;;C:\WINDOWS;C:\WINDOWS\COMMAND
java.protocol.handler.pkgs = sun.plugin.net.protocol|sun.plugin.net.protocol
java.runtime.name = Java(TM) 2 Runtime Environment, Standard Edition
java.runtime.version = 1.4.2_01-b06
java.specification.name = Java Platform API Specification
java.specification.vendor = Sun Microsystems Inc.
java.specification.version = 1.4
java.util.prefs.PreferencesFactory = java.util.prefs.WindowsPreferencesFactory
java.vendor = Sun Microsystems Inc.
java.vendor.applet = true
java.vendor.url = http://java.sun.com/
java.vendor.url.applet = true
java.vendor.url.bug = http://java.sun.com/cgi-bin/bugreport.cgi
java.version = 1.4.2_01
java.version.applet = true
java.vm.info = mixed mode
java.vm.name = Java HotSpot(TM) Client VM
java.vm.specification.name = Java Virtual Machine Specification
java.vm.specification.vendor = Sun Microsystems Inc.
java.vm.specification.version = 1.0
java.vm.vendor = Sun Microsystems Inc.
java.vm.version = 1.4.2_01-b06
javaplugin.maxHeapSize = 96m
javaplugin.nodotversion = 142_01
javaplugin.proxy.config.list = http=proxy,https=proxy,ftp=proxy,gopher=proxy
javaplugin.proxy.config.type = manual
javaplugin.version = 1.4.2_01
javaplugin.vm.options = -Djava.class.path=C:\PROGRA~1\JAVA\J2RE14~1.2_0\classes -Xbootclasspath/a:C:\PROGRA~1\JAVA\J2RE14~1.2_0\lib\plugin.jar -Xmx96m -Djavaplugin.maxHeapSize=96m -Xverify:remote -Djavaplugin.version=1.4.2_01 -Djavaplugin.nodotversion=142_01 -Dbrowser=sun.plugin -DtrustProxy=true -Dapplication.home=C:\PROGRA~1\JAVA\J2RE14~1.2_0 -Djava.protocol.handler.pkgs=sun.plugin.net.protocol
line.separator = \r\n
line.separator.applet = true
os.arch = x86
os.arch.applet = true
os.name = Windows Me
os.name.applet = true
os.version = 4.90
os.version.applet = true
package.restrict.access.netscape = false
package.restrict.access.sun = true
package.restrict.definition.java = true
package.restrict.definition.netscape = true
package.restrict.definition.sun = true
path.separator = ;
path.separator.applet = true
sun.arch.data.model = 32
sun.boot.class.path = C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\rt.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\i18n.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\sunrsasign.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\jsse.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\jce.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\lib\charsets.jar;C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\classes;C:\PROGRA~1\JAVA\J2RE14~1.2_0\lib\plugin.jar
sun.boot.library.path = C:\PROGRAM FILES\JAVA\J2RE1.4.2_01\bin
sun.cpu.endian = little
sun.cpu.isalist = pentium i486 i386
sun.io.unicode.encoding = UnicodeLittle
sun.java2d.fontpath =
sun.net.client.defaultConnectTimeout = 120000
sun.os.patch.level =
trustProxy = true
user.country = US
user.dir = C:\WINDOWS\Desktop
user.home = C:\WINDOWS
user.language = en
user.name = Michael G. Coucke
user.timezone =
user.variant =
Done.
Dump classloader list ...
codebase=http://kraken.lowell.edu/, key=http://kraken.lowell.edu/,IONJava/classes/ion_16.jar,IONJava/classes/LP.jar, zombie=false, cache=true, refcount=1, info=sun.plugin.ClassLoaderInfo@109de5b
Done.
Dump thread list ...
Group main,ac=11,agc=2,pri=10
main,5,alive
AWT-Windows,6,alive,dameon
AWT-Shutdown,5,alive
Java2D Disposer,10,alive,dameon
AWT-EventQueue-0,6,alive
Group Plugin Thread Group,ac=3,agc=0,pri=10
Main Console Writer,6,alive
AWT-EventQueue-1,6,alive
TimerQueue,5,alive,dameon
Group http://kraken.lowell.edu/-threadGroup,ac=2,agc=0,pri=4
thread applet-LPRemote.class,4,alive
AWT-EventQueue-2,4,alive
Done.
I'm not a Java expert, so this may be more information than you ever wanted to see.
Once again, I hope that you can help. My experience has been that I usually have some obscure option set incorrectly and that causes me great grief.
Thanks fo your help,
Mike Coucke
[email protected]
----- Original Message -----
From: "Jeffrey Hall" <[email protected]>
To: "'Mike Coucke'" <[email protected]>
Sent: Thursday, September 04, 2003 11:48 AM
Subject: RE: Registration with Lowell Education Online
Hi Mike,
Try it now. I think this problem has arisen because Sun just
released a new version of the Plug-in (1.4.2), and when we released the
public beta of LOPARC, only one relevant version (1.4.0) was available
and the LOPARC code was written to look for that by default. I have
just recoded the relevant routines so they should now cause your browser
to simply pick up the latest 1.4 version of the Plug-in you have
installed, whatever it is. I "broke" Java on my machine to replicate
your problem, and the code I inserted today did fix it. Hopefully it
will have the same effect for you. I am running IE 6 and plugin
1.4.2_01 (as accessed via Tools->Sun Java Console).
One broader problem: some (non-LOPARC-specific) users on the Sun
forums have reported the "JRE collision" you are seeing when multiple
versions of the Plug-in are installed on the same machine. So if the
fix I made to our code doesn't work, one option would be to uninstall
all Java components from your computer and do a fresh install of the
latest runtime environment.
Let me know how/if this works. Thanks for the feedback and for your
patience.
Best regards,
Jeff Hall
Lowell Observatory
-----Original Message-----
From: Mike Coucke [mailto:[email protected]]
Sent: Wednesday, September 03, 2003 6:30 PM
To: [email protected]
Subject: Re: Registration with Lowell Education Online
Hello Jeff:
So far, I have been unable to launch a LOPARC session. I repeatedly
get the following error message:
"Exception: java.lang.ClassNotFoundException: LPRemote.class"
My browser is MS Internet Explorer version 6.0.2800.1106 Initially I was
using Java Plug-In version 1.4.1 and received the error message. I went
to the Sun website and downloaded/installed Java Plug-In version 1.4.2
and still get the message.
Before I try to launch LOPARC, I can select Tools->Sun Java Console from
IE's pull down menu to check my Java Plug-In version. When I try to
launch LOPARC, I get the following message:
"Applet(s) in this HTML page requires a version of Java different from
the one the browser is currently using. In order to run the applet(s)
in this HTML page, a new browser session is required, press 'Yes' to
start a new browser session." If I select 'No', I get the following
message: "Java Plug-in detected JRE collission"
If I select 'Yes', a new browser window opens and then I get the first
message above.
Can you help?
Mike Coucke
[email protected]
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Monday, September 01, 2003 5:30 PM
Subject: Registration with Lowell Education Online
September 1, 2003
Dear Michael Coucke:
Thank you for registering with Lowell Observatory's online education
site. We hope you enjoy using it and visit regularly as we continue to
expand its features and capabilities. This is a one-time welcoming
email.
For your records, your user ID is xxxxx, and your password is #########.
You'll need to supply these each time you log in.
This site gives you access to research-grade equipment including a 16"
telescope, CCD detector, and image processing software. Our online
archive of data is now available 24/7. The telescope will be opening to
our onsite users in May, and on select nights to the Internet at large
in June.
We have designed this site so you don't need a huge monitor or a
supercomputer to use it. All pages are viewable on screens running at
800x600 resolution or higher. To use LOPARC, you'll need a Java-enabled
browser with the Java 1.4 plug-in installed. If you don't have the
plug-in, you'll be prompted to download it the first time you attempt to
connect. This is an admittedly large (9 MB) but one-time-only download.
This site works correctly under Internet Explorer version 5 or higher.
If you use Netscape, you must be running version 6 or higher, and
display or applet behavior anomalies may occur.
If at any time you can't connect to our server, simply try again later.
We do experience several power outages each year, particularly during
Flagstaff's summer thunderstorm season. Our server is fully protected
and backed up, and can be quickly brought back on line, but any active
user sessions will be lost. Thanks for your patience during these
inevitable downtimes.
Your questions, comments, suggestions, and bug reports about this site
are always welcome. On behalf of the LOPARC development team, thanks
for signing up!
Jeffrey Hall
Assistant Research Scientist
Associate Director, Education and Special Programs
Lowell Observatory
Flagstaff, Arizona

Hi Mike,
I see this in your logs:
Java(TM) Plug-in: Version 1.4.2_01
Using JRE version 1.4.2_01 Java HotSpot(TM) Client VM
User home directory = C:\WINDOWS
Proxy Configuration: Manual Configuration
Proxy: http=proxy,https=proxy,ftp=proxy,gopher=proxy
Proxy Overrides:
I just helped my Dad set up his computer with a new
cable modem, and had the situation where we couldn't
access any secure Web sites. The cable folks had us
disable the proxy. It looks like the error message is
saying it can't find your proxy server, and the logs
you posted say that you've decided to configure your
proxy manually, rather than using the settings from
IE (which is how mine is set up in the plugin
control panel.)
Could that be the problem?
--Steve

Very high memory usage..possible memory leak? Solaris 10 8/07 x64

Hi,
I noticed yesterday that my machine was becoming increasingly slow, where once it was pretty snappy. It's a Compaq SR5250NX with 1GB of RAM. Upon checking vmstat, I noticed that the "Free" column was ~191MB. Now, the only applications I had open were FireFox 2.0.11, GAIM, and StarOffice. I closed all of them, and the number reported in the "Free" column became approximately 195MB. "Pagefile" was about 5.5x that size. There were no other applications running and it's a single user machine, so I was the only one logged in. System uptime: 9 days.
I logged out, logged back in, to see if that had an affect. It did not. Rebooted and obviously, that fixed it. Now with only FireFox, GAIM, and a terminal open, vmstat reports "Free" as ~450MB. I've noticed if I run vmstat every few seconds, the "Free" total keeps going down. Example:
unknown% vmstat
kthr      memory            page            disk          faults      cpu
r b w   swap free re mf pi po fr de sr cd s0 s1 s2   in   sy   cs us sy id
0 0 0 870888 450220 9 27 10 0 1 0 8 2 -0 -0 -0 595 1193 569 72 1 28
unknown% vmstat
kthr      memory            page            disk          faults      cpu
r b w   swap free re mf pi po fr de sr cd s0 s1 s2   in   sy   cs us sy id
0 0 0 870880 450204 9 27 10 0 1 0 8 2 -0 -0 -0 596 1193 569 72 1 28
unknown% vmstat
kthr      memory            page            disk          faults      cpu
r b w   swap free re mf pi po fr de sr cd s0 s1 s2   in   sy   cs us sy id
0 0 0 870828 450092 9 27 10 0 1 0 8 2 -0 -0 -0 596 1193 570 71 1 28
unknown%Output of prstat -u Kendall (my username ) is as follows:
   PID USERNAME SIZE   RSS STATE PRI NICE      TIME CPU PROCESS/NLWP
2026 Kendall   124M   70M sleep   59    0   0:01:47 1.4% firefox-bin/7
1093 Kendall    85M   77M sleep   59    0   0:07:15 1.1% Xsun/1
1802 Kendall    60M   15M sleep   59    0   0:00:08 0.1% gnome-terminal/2
1301 Kendall    93M   23M sleep   49    0   0:00:30 0.1% java/14
1259 Kendall    53M   15M sleep   49    0   0:00:32 0.1% gaim/1
2133 Kendall 3312K 2740K cpu1    59    0   0:00:00 0.0% prstat/1
1276 Kendall    51M   12M sleep   59    0   0:00:11 0.0% gnome-netstatus/1
1247 Kendall    46M   10M sleep   59    0   0:00:06 0.0% metacity/1
1274 Kendall    51M   13M sleep   59    0   0:00:05 0.0% wnck-applet/1
1249 Kendall    56M   17M sleep   59    0   0:00:07 0.0% gnome-panel/1
1278 Kendall    48M 9240K sleep   59    0   0:00:05 0.0% mixer_applet2/1
1245 Kendall 9092K 3844K sleep   59    0   0:00:00 0.0% gnome-smproxy/1
1227 Kendall 8244K 4444K sleep   59    0   0:00:01 0.0% xscreensaver/1
1201 Kendall 4252K 1664K sleep   59    0   0:00:00 0.0% sdt_shell/1
1217 Kendall    55M   16M sleep   59    0   0:00:00 0.0% gnome-session/1
   779 Kendall    47M 2208K sleep   59    0   0:00:00 0.0% gnome-volcheck/1
   746 Kendall 5660K 3660K sleep   59    0   0:00:00 0.0% bonobo-activati/1
1270 Kendall    49M   10M sleep   49    0   0:00:00 0.0% clock-applet/1
1280 Kendall    47M 8904K sleep   59    0   0:00:00 0.0% notification-ar/1
1199 Kendall 2928K 884K sleep   59    0   0:00:00 0.0% dsdm/1
1262 Kendall    47M 2268K sleep   59    0   0:00:00 0.0% gnome-volcheck/1
Total: 37 processes, 62 lwps, load averages: 0.11, 0.98, 1.63System uptime is 9 hours, 48 minutes. I'm just wondering why the memory usage seems so high to do...nothing. It's obviously a real problem as the machine turned very slow when vmstat was showing 195MB free.
Any tips, tricks, advice, on which way to go with this?
Thanks!

Apologies for the delayed reply. School has been keeping me nice and busy.
Anyway, here is the output of prstat -Z:
   PID USERNAME SIZE   RSS STATE PRI NICE      TIME CPU PROCESS/NLWP
2040 Kendall      144M   76M sleep   59    0   0:04:26 2.0% firefox-bin/10
28809 Kendall     201M 193M sleep   59    0   0:42:30 1.9% Xsun/1
2083 Kendall      186M   89M sleep   49    0   0:02:31 1.2% java/58
2260 Kendall       59M   14M sleep   59    0   0:00:00 1.0% gnome-terminal/2
2050 Kendall       63M   21M sleep   49    0   0:01:35 0.6% realplay.bin/4
2265 Kendall     3344K 2780K cpu1    59    0   0:00:00 0.2% prstat/1
29513 Kendall     71M   33M sleep   39    0   0:07:25 0.2% gaim/1
28967 Kendall     56M   18M sleep   59    0   0:00:24 0.1% gnome-panel/1
29060 Kendall     93M   24M sleep   49    0   0:02:58 0.1% java/14
28994 Kendall     51M   13M sleep   59    0   0:00:23 0.1% wnck-applet/1
28965 Kendall     49M   14M sleep   59    0   0:00:33 0.0% metacity/1
   649 noaccess   164M   46M sleep   59    0   0:09:54 0.0% java/23
28996 Kendall     51M   12M sleep   59    0   0:00:50 0.0% gnome-netstatus/1
2264 Kendall    1352K 972K sleep   59    0   0:00:00 0.0% csh/1
28963 Kendall 9100K 3792K sleep   59    0   0:00:03 0.0% gnome-smproxy/1
ZONEID    NPROC SWAP   RSS MEMORY      TIME CPU ZONE
     0           80          655M 738M    73%       1:18:40 7.7% global
Total: 80 processes, 322 lwps, load averages: 0.27, 0.27, 0.22Sorry about the bad formatting, it's copied from the terminal.
In any event, we can see that FireFox is sucking up 145MB (??!?!!? crazy...) XSun, 200MB, and java 190MB. I'm running Java Desktop System (Release 3) so I assume that is what accounts for the the high memory usage RE: java process. But, XSun, 200MB?
Is this normal and I just need to toss another gig in, or what?
Thanks

Applet hangs web server when upgrading from 1.6 to 1.7

I've got a client-side printing application which works fine on 1.6 and fails on 1.7 where it essentially hang the server on the connect option to the server and loading the jar file. Specifics:
PC Client running windows 7 x64
Browser versions IE9, IE10, Firefox 17.0.1 (PC-client) all fail
Client PC has latest Java 1.7.0 10-b 18 installed
Web server is Apache2.4.3 x64 running on Windows 2008 Server R2 through the network
Jar file is signed and the certificate is loaded
Apache server is sitting on another server through a network connection. Backrev java to 1.6 and it passes. I've specified the -Djava.net.prefIPv4Stack=true option in the applet call but it doesn't fix the issue.
The java console loads but then hangs on the connecting portion:
Java Plug-in 10.10.2.18
Using JRE version 1.7.0_10-b18 Java HotSpot(TM) Client VM
User home directory = C:\Users\user
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
cache: Initialize resource manager: com.sun.deploy.cache.ResourceProviderImpl@1ae81ab
security: property package.access value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.
security: property package.access new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws
security: property package.access value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws
security: property package.access new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy
security: property package.access value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy
security: property package.access new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy,com.sun.jnlp
security: property package.definition value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.
security: property package.definition new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws
security: property package.definition value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws
security: property package.definition new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy
security: property package.definition value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy
security: property package.definition new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy,com.sun.jnlp
security: property package.access value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy,com.sun.jnlp
security: property package.access new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy,com.sun.jnlp,org.mozilla.jss
security: property package.definition value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy,com.sun.jnlp
security: property package.definition new value sun.,com.sun.xml.internal.ws.,com.sun.xml.internal.bind.,com.sun.imageio.,com.sun.org.apache.xerces.internal.utils.,com.sun.org.apache.xalan.internal.utils.,com.sun.org.glassfish.external.,com.sun.org.glassfish.gmbal.,com.sun.javaws,com.sun.deploy,com.sun.jnlp,org.mozilla.jss
security: --- parseCommandLine converted : -Djava.net.preferIPv4Stack=true
into:
[-Djava.net.preferIPv4Stack=true]
basic: Added progress listener: sun.plugin.util.ProgressMonitorAdapter@8bbbf4
basic: Plugin2ClassLoader.addURL parent called for http://10.100.1.61/patholog/java/patholog/dist/PathologLibS.jar
security: Blacklist revocation check is enabled
security: Trusted libraries list check is enabled
network: Cache entry found [url: http://10.100.1.61/patholog/java/patholog/dist/PathologLibS.jar, version: null] prevalidated=true/0
cache: Adding MemoryCache entry: http://10.100.1.61/patholog/java/patholog/dist/PathologLibS.jar
cache: Resource http://10.100.1.61/patholog/java/patholog/dist/PathologLibS.jar has expired.
network: Connecting http://10.100.1.61/patholog/java/patholog/dist/PathologLibS.jar with proxy=DIRECT
network: Connecting http://10.100.1.61:80/ with proxy=DIRECT
network: Connecting http://10.100.1.61/patholog/java/patholog/dist/PathologLibS.jar with cookie "Patholog=vl141e491gffhpc07aupt0rnq5"
What is most irritating is that a local instance for debugging (i.e. apache2.4.3 x64) running locally and running the application on the same machine) passes perfectly so it appears that it involves a network connection rather than a localhost operation.
I noticed on a good connection the server returns with ResponseCode 304. I do not see that line in the log on the failing applet load. Apache logs set at debug show no errors even though the operation hangs the server.
Anyone got any ideas on how to debug and resolve this?
-Thanks
-G

More information:
Installed jre.1.6.37 (x32 version) along with 1.7.10 (x32 version) and the applet loads. Installed 1.7.10 (x32 version) only on the windows 7 x64 client fails. I've done both the x-java-applet method and the JNLP method and both hang. The JNLP j2se version is set to "1.6+" so in theory 1.7 should jre should work fine without a 1.6.37 loaded.
I've got wireshark dumps that I'm analyzing and noticed that there two OCSP responses (successful) but nothing after that, specifically where it hangs. Any ideas on how to debug this further?

SeaMonkey v2.0.4's Java applets doesn't work all the time.

Hello. I use Mozilla's SeaMonkey v2.0.4 (using binary from mozilla.org) in Debian/Linux. I can get Java applets to work on https://eetime11.adp.com/c08e/logon but not on http://javatester.org, http://java.com/en/download/installed.jsp, and http://java.com/en/download/help/testvm.xml
Java Plug-in 1.6.0_20
Using JRE version 1.6.0_20-b02 Java HotSpot(TM) Client VM
User home directory = /home/ant
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class testvm2/Main.class not found.
java.lang.ClassNotFoundException: testvm2.Main.class
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
FYI on my setups:
$ pwd
/home/Programs/seamonkey2/plugins
$ ls -all
total 28
drwxr-xr-x 2 ant ant 4096 2010-04-15 15:46 .
drwxr-xr-x 15 ant ant 4096 2010-04-16 08:32 ..
lrwxrwxrwx 1 root root 32 2009-11-27 17:19 libflashplayer.so -> /home/Programs/libflashplayer.so
lrwxrwxrwx 1 root root 63 2010-04-15 15:46 libjavaplugin_oji.so -> /home/Programs/jre1.6.0_20/plugin/i386/ns7/libjavaplugin_oji.so
-rwxr-xr-x 1 ant ant 15824 2009-10-17 09:30 libnullplugin.so
$ ls -all /home/Programs/jre1.6.0_20/plugin/i386/ns7/libjavaplugin_oji.so
-rwxr-xr-x 1 ant ant 137021 2010-04-12 14:39 /home/Programs/jre1.6.0_20/plugin/i386/ns7/libjavaplugin_oji.so
Does anyone know why? Thank you in advance. :)
Edited by: antdude on Apr 16, 2010 8:37 AM

More poking around:
$ java -version
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8pre) (6b18~pre2-1)
OpenJDK Server VM (build 14.0-b16, mixed mode)
# dpkg -l | grep ^ii |grep java
ii ca-certificates-java 20091021 Common CA certificates (JKS keystore)
ii java-common 0.35 Base of all Java packages
ii libaccess-bridge-java 1.26.2-4 Java Access Bridge for GNOME
ii libaccess-bridge-java-jni 1.26.2-4 Java Access Bridge for GNOME (jni bindings)
ii libhsqldb-java 1.8.0.10-6 Java SQL database engine
ii liblucene2-java 2.9.2+ds1-1 Full-text search engine library for Java(TM)
ii libservlet2.4-java 5.0.30-12 Servlet 2.4 and JSP 2.0 Java library
ii openoffice.org-java-common 1:3.2.0-4 full-featured office productivity suite -- arch-independent Java support files
ii tzdata-java 2010h-1 time zone and daylight-saving time data for use by java runtimes
# dpkg -l | grep ^ii |grep jre
# locate bin/java
/home/Programs/jre1.6.0_20/bin/java
/home/Programs/jre1.6.0_20/bin/java_vm
/home/Programs/jre1.6.0_20/bin/javaws
/usr/bin/java
/usr/bin/javaws
/usr/lib/jvm/java-6-openjdk/bin/java
/usr/lib/jvm/java-6-openjdk/bin/java-rmi.cgi
/usr/lib/jvm/java-6-openjdk/bin/javaws
/usr/lib/jvm/java-6-openjdk/jre/bin/java
/usr/lib/jvm/java-6-openjdk/jre/bin/javaws
/usr/lib/jvm/java-6-openjdk/jre/bin/javaws.real
I tried to uninstall all the unneccesary Java packages, but still had some can't be removed because of other programs requiring it like OpenOffice:
# apt-get remove openjdk-6-jre-headless
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
openoffice.org-filter-mobiledev ttf-sil-gentium ttf-sil-gentium-basic
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
ca-certificates-java libaccess-bridge-java libaccess-bridge-java-jni libhsqldb-java liblucene2-java libservlet2.4-java
openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib openoffice.org openoffice.org-base openoffice.org-officebean
openoffice.org-report-builder-bin
0 upgraded, 0 newly installed, 13 to remove and 125 not upgraded.
After this operation, 114MB disk space will be freed.
Do you want to continue [Y/n]? n
Abort.
# apt-get remove java-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
openoffice.org-filter-mobiledev ttf-sil-gentium ttf-sil-gentium-basic
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
ca-certificates-java java-common libaccess-bridge-java libaccess-bridge-java-jni libhsqldb-java liblucene2-java
libservlet2.4-java openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib openoffice.org openoffice.org-base
openoffice.org-officebean openoffice.org-report-builder-bin
0 upgraded, 0 newly installed, 14 to remove and 125 not upgraded.
After this operation, 115MB disk space will be freed.
Do you want to continue [Y/n]? n
Abort.
Any ideas? :(

Applet with JDBC runs very slow

I have recently created an applet which I am using to interface with a MS SQL Server 2000 database using JDBC. The server is running W2K Server, and a Tomcat web server.
There are some performance problems with this application. The volume of data being demanded by the database is very low, yet it runs very slow. More specifically, however, the application runs at a very fast pace for several seconds, then "stalls" for 10 -15 seconds.
The stalling of the application does not take place at the same place in the code all the time; rather it seems to be completely independent of what I am doing. Sometimes a particular operation takes 20 seconds to complete, but the next day the same thing only takes 20msec.
Any ideas?
Thanks

sounds like network usage issues
hard to tell with no code and no idea how you're configured

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