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Problem with Java plugin (plug-in) 1.3.1_02.

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Ben Moir

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Feb 13, 2002, 6:40:31 PM2/13/02

I have found ways to workaround/resolve these issues, but thought I'd
post them here in case others have bumped into the same issues.

I did not have these issues loading applets prior to the JRE/Java plugin
1.3.1_02.

Environment (for me):
- OS: NT4, SP6
- JRE: 1.3.1_02 (new)
- Java Plug-in: 1.3.1_02 (new)
- Internet Explorer: 4, SP2 (also seen on 5, SP2; not seen on 6).
- I do not need or use a proxy server.
- prior to this problematic behaviour, I had JDK 1.2.2 (and 1.1.8) only.

Description of the problem:
After installing new JRE 1.3.1_02 (Java plugin), connecting to
http://java.sun.com (and loading the applet in the top-right corner of
the page) reports some exceptions that were not previously seen when
accessing this page.

See "What is being seen..." for output to web-browser, and Java console,
etc.

Solution (for me):
- in Internet Explorer (4) \ View \ Internet Options... \ Connection
(tab) \ Proxy Server (section)
- de-select "Access the Internet using a proxy server"
OR
ensure proper settings for proxy server!
- close all IE sessions
- restart IE. (Proxy server setting should now be de-selected.)
- re-connect to webpage with applet.

- Important Note: for me, I found that after a machine reboot IE had
re-set "Access the Internet using a proxy server" setting, so I need to
de-select (as above) after any reboots. I suspect this is a bug with my
system or IE or the Java plugin, but I don't have time to investigate
further. I'd be interested in any findings on this!

Tip:
- for Java Console (of Java plugin), use debug trace level "5" to see
what is happening.

Side issue as part of this problem:
- once the proxy server setting has been setup properly (as above), the
following situation should not be seen, but, again, noted here for
reference.
- situation: (with proxy server setting incorrect): not only do I see
the things noted in the "What is being seen..." section (below), IE also
prompts me to save the ZIP file (news.zip) - if I've gone to
http://java.sun.com page. IE should NOT be prompting me to save ZIP
files.
- if there are extended problems with loading ZIP files from applet HTML
pages, try renaming the ZIP file to be JAR, and also the reference
within the HTML.
- I've also seen where IE will report that it cannot find or load
"name/class.class" in trying to fix this common bunch of problems.
However, fixing proxy server setting and/or using JAR (instead of ZIP)
by-passed or resolved this class.class problem.

What is being seen...

(1)
Java Plug-in Exception Dialog \ General Exception:

java.lang.ClassNotFoundException: java.net.ConnectException: Connection
refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.http.HttpClient.privilegedOpenServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.<init>(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.New(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.privBlock(Unknown
Source)
at
sun.plugin.protocol.jdk12.http.HttpURLConnection$PrivilegedBlockAction.run(Unknown
Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connect(Unknown
Source)
at
sun.plugin.protocol.jdk12.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)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.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)

------------------

(2)
Java Console (window reports):

(with debug trace level "5" being used -- see menu to activate
this.)
(Notice problematic "proxy" info as ":8080". For me, this is
invalid.)

...
Opening http://192.18.97.80/javanews/classes/News.class
Connecting http://192.18.97.80/javanews/classes/News.class with
proxy=:8080
Cache filename: C:\WINNT\Profiles\Administrator\Temporary Internet
Files\0TIL8JYF\News.class
load: class News not found.
java.lang.ClassNotFoundException: java.net.ConnectException: Connection
refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.http.HttpClient.privilegedOpenServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.<init>(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.New(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.privBlock(Unknown
Source)
at
sun.plugin.protocol.jdk12.http.HttpURLConnection$PrivilegedBlockAction.run(Unknown
Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connect(Unknown
Source)
at
sun.plugin.protocol.jdk12.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)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.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)
java.lang.ClassNotFoundException: java.net.ConnectException: Connection
refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.http.HttpClient.privilegedOpenServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.<init>(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpClient.New(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.privBlock(Unknown
Source)
at
sun.plugin.protocol.jdk12.http.HttpURLConnection$PrivilegedBlockAction.run(Unknown
Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connect(Unknown
Source)
at
sun.plugin.protocol.jdk12.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)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.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)
...

-- end of post --

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