There are intermittent failures, some successes, at least three observed
page faults when running a web client test which makes 125 connections
to a webserver. Each connection sends one HTTP GET request. The responses
are read-selected when ready.

The following IOException is the source of failures:
java.io.IOException: The number of specified semaphore events for
DosMuxSemWait is not correct
        at sun.nio.ch.PollArrayWrapper.poll0(Native Method)
        at sun.nio.ch.PollArrayWrapper.poll(PollArrayWrapper.java:181)
        at sun.nio.ch.SelectorImpl.doSelect(SelectorImpl.java:88)
        at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:114)
        at requestHandler.run(requestHandler.java:30)
        at java.lang.Thread.run(../../../src/share/classes/java/lang/Thread.java
:579)

There were 3 page faults seen when the test was re-run
following a failure where total number of trials
was ~25.

JAVA caused an invalid page fault in
module KERNEL32.DLL at 0187:bff7a138.
Registers:
EAX=00000000 CS=0187 EIP=bff7a138 EFLGS=00010206
EBX=08ddb044 SS=018f ESP=0913fae8 EBP=0913fb1c
ECX=00000400 DS=018f ESI=08dda020 FS=4747
EDX=00000001 ES=018f EDI=00001024 GS=0000
Bytes at CS:EIP:
89 51 08 8b 53 08 8b 43 04 89 42 04 8d 93 0b 10
Stack dump:
0913fb1c 08dda020 00590000 068ac458 bff7b31d 00590000 08dda020
00001024 00000200 006b4454 08dda024 068ac458 08dda020 0913fb64
78001436 00590000


Successful test runs have been seen. From a continuous run of
20 executions, 6 had passed.

Also seen infrequently (accompanied sometimes with the DosMux
error):
java.net.SocketException: Bad file descriptor
        at sun.nio.ch.IOUtil.connect(Native Method)
        at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:181)
        at remoteEntity.go(remoteEntity.java:37)
        at remoteEntity.<init>(remoteEntity.java:25)
        at webClientTest$Client.go(webClientTest.java:109)
        at webClientTest$Client.run(webClientTest.java:96)


Test files and compiled classes are attached in a tar file.

Usage:

   java webClientTest -webServer polomski.eng.sun.com

May want to pipe output of test (125 http responses) to a file.
Any webserver might be able to be used. The test only
assumes port 8080 and a base index.html file.

When the number of client requests is reduced e.g. to 25,
no errors were seen on win98.