This bug appears on jdk1.2, does not appear on jdk1.1.4. I am running a complex test suite (applet attack test suite). On win95 I receive the following exception :
java.lang.NullPointerException
at sun.net.www.http.ClientVector.run(KeepAliveCache.java:235)
at java.lang.Thread.run(Thread.java:472)
On Solaris, the test suite hangs (appletviewer window opens, starts some tests, and stops)

I suspect that the someone inserted a null into the following array:
(from KeepAliveCache.java)
       for (int i = 0; i < size(); i++) {
            h = (HttpClient) elementAt(i);
            h.closeServer();
 

When I tried to simplify the test case, in order to be more specific about the exception, the exception did not occur.

I am willing to share the test case. Let me know if required....