UDP packets cannot be received on WIN32 when running the UDP Client/Server Test Application from WIN32 --> SOLARIS if the packet size is < 64K. The UDP Client/Server Test Application dies with a socket exception from DatagramSocket.receive(). Here is what happens. This only occurs when the udpClient is running on WIN32 and the udpServer is running on SOLARIS.

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on SOLARIS 2.6
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serverhost% java udpServer -d -v -l 0

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on WINDOWS 95
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clienthost% java udpClient -d -v -b 1 -c -s serverhost -m 10 -l 10

VERBOSE: port number is = 26000
VERBOSE: buffer size is = 1K
VERBOSE: real buffer size is = 1024
VERBOSE: server name = lobo
VERBOSE: loop count is = 10
VERBOSE: number of messages = 10
VERBOSE: data comparison = true
VERBOSE: random buffer sizes = false
DEBUG: creating datagram socket
DEBUG: DATAGRAM SOCKET INFO
DEBUG: --------------------
DEBUG: getLocalPort() = 1578
DEBUG: getSoTimeout() = 0
DEBUG: Dump getLocalAddress()
DEBUG: INET ADDRESS INFO
DEBUG: -----------------
DEBUG: getHostName() = 0.0.0.0
DEBUG: getAllByName[0] = 0.0.0.0/0.0.0.0
DEBUG: getByName() = 0.0.0.0/0.0.0.0
DEBUG: getLocalHost() = aefpc.east.sun.com/129.148.27.249
DEBUG: getHostAddress() = 0.0.0.0
DEBUG: isMulticastAddress() = false
DEBUG: INET ADDRESS INFO
DEBUG: -----------------
DEBUG: getHostName() = lobo
DEBUG: getAllByName[0] = lobo/129.148.27.228
DEBUG: getByName() = lobo/129.148.27.228
DEBUG: getLocalHost() = aefpc.east.sun.com/129.148.27.249
DEBUG: getHostAddress() = 129.148.27.228
DEBUG: isMulticastAddress() = false
DEBUG: wrote datagram message #1
ERROR: udpClient.udpClient(): exception occurred:
java.net.SocketException: socket closed
java.net.SocketException: socket closed
        at java.net.PlainDatagramSocketImpl.receive(Native Method)
        at java.net.DatagramSocket.receive(DatagramSocket.java:223)
        at udpClient.<init>(udpClient.java:181)
        at udpClient.main(udpClient.java:95)
VERBOSE: completed loop #1

When you use a buffer size of 64 K the udpClient program works.

clienthost% java udpClient -d -v -b 64 -c -s serverhost -m 10 -l 10

I added the UDP Client/Server Test Application as part of the attachment.

The following futher information is provided for this bug:

The udpClient test application fails on JDK1.2Beta2-W through
JDK1.2Beta2-Y with a socket exception as explained in the UDP
bug (4096297). Here is the exception and stack trace I get from
the udpClient test application.

ERROR: udpClient.udpClient(): exception occurred:
java.net.SocketException: socket closed
java.net.SocketException: socket closed
at java.net.PlainDatagramSocketImpl.receive(Native Method)
at java.net.DatagramSocket.receive(DatagramSocket.java:223)
at udpClient.<init>(udpClient.java:213)
at udpClient.main(udpClient.java:127)

The udpClient test application fails on JDK1.2PS which is
JDK1.2Beta1 for a different reason then JDK1.2Beta2. It doesn't
receieve packets back from the udpServer and also the udpClient
java test application aborts.

Since the failures are different from JDK1.2Beta1 to JDK1.2Beta2
we cannot compare them.

So what does this tell us? In any event the UDP bug is a regression
from WIN32 to SOLARIS when using JDK1.2Beta2-Y. It fails as explained
in the UDP bug (4096297).

On the other hand UDP works from WIN32 to SOLARIS when using
JDK1.1.5K.

So the UDP bug is a regression.

How important is it to be fixed has to be determined by the powers
to be.