JDK-4203734 : Bug in sun.applet.AppletClassloader class loading in JDK 1.2
  • Type: Bug
  • Component: tools
  • Sub-Component: appletviewer
  • Affected Version: 1.1.2,1.2.0,1.2.1,1.2.2
  • Priority: P2
  • Status: Resolved
  • Resolution: Fixed
  • OS:
    generic,solaris_2.6,windows_95,windows_nt generic,solaris_2.6,windows_95,windows_nt
  • CPU: generic,x86,sparc
  • Submitted: 1999-01-16
  • Updated: 1999-02-04
  • Resolved: 1999-02-04
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Other
1.2.2 1.2.2Fixed
Related Reports
Duplicate :  
JDK-4196224 - all 1.2 applets getting page fault with internet explorer
Duplicate :  
JDK-4223255 - java plugin 1.2 causes null pointer exception 0x0000000 in IE
Duplicate :  
JDK-4225841 - IE 4+ crashes when applet initialized using Plugin 1.2
Duplicate :  
JDK-4291305 - ResourceBundle.getBundle fails when webpage downloaded with https
Duplicate :  
JDK-4223655 - Plug-in crashes loading under IE 4
Description
In JDK 1.2, there is a bug in sun.applet.AppletClassloader.getBytes(). When applet class are loaded by the appletclassloader, it uses HttpURLConnection.getInputStream() for downloading class from the codebase. However, it never checks the result of the HTTP connection. In case the file is missing on the server, HttpURLConnection.getInputStream will still return back a stream, but the stream is actually the error message. Thus, when appletclassloader tries to call defineClass on the stream that is returned from getInputStream(), it will return in exception in this case.

This bug has been doing lots of damages for Java Plug-in 1.2, and it actually causes Java Plug-in to crash in IE on Win95. 

This bug should be fixed by always checking the respond code when making the HTTP connection.

stanley.ho@eng
Comments
CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: 1.2.2 generic FIXED IN: 1.2.2 INTEGRATED IN: 1.2.2
14-06-2004
WORK AROUND None.
11-06-2004
EVALUATION It's a bug. janet.koenig@Eng 1999-01-25
25-01-1999