error running Java server on XP

[dipakyadav]

I am trying to run the Hello Server in Java. Initially the code would not compile because I didnot have the ice.jar in the classpath. ( I had the directory in the classpath as mentioned in the documentation - 3.4 - Writing an Ice application with Java and it doesn't work). Once I added the jar, I went past compilation and ended up with error below.

F:\iceproject>set ICEJ_HOME=F:\IceJ-1.0.0

F:\iceproject>javac -d classes -classpath classes;F:/IceJ-1.0.0/lib/ice.jar -sou
rce 1.4 Server.java HelloI.java generated/*.java

F:\iceproject>javac -d classes -classpath classes;F:/IceJ-1.0.0/lib/ice.jar -sou
rce 1.4 Client.java HelloI.java generated/*.java

F:\iceproject>java -classpath classes;F:/IceJ-1.0.0/lib/ice.jar;. Server
Ice.SyscallException
error = 0
at Ice.PropertiesI.load(PropertiesI.java:171)
at Server.main(Server.java:37)
Caused by: java.io.FileNotFoundException: config (The system cannot find the fil
e specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.jav a:103)
at java.io.FileInputStream.<init>(FileInputStream.jav a:66)
at java.io.FileReader.<init>(FileReader.java:39)
at Ice.PropertiesI.load(PropertiesI.java:165)
... 1 more

F:\iceproject>java -version
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)

[marc]

Originally posted by dipakyadav

F:\iceproject>java -classpath classes;F:/IceJ-1.0.0/lib/ice.jar;. Server
Ice.SyscallException
error = 0
at Ice.PropertiesI.load(PropertiesI.java:171)

This means that the server cannot find the file "config", which contains the properties for the hello demo. "config" is in demo/Ice/hello, so if you start the server from within this directory, this file should be found.

Originally posted by dipakyadav

F:\iceproject>java -version
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)

I don't think this is related to the problem, but you should definitely upgrade to version 1.4.1. The NIO implementation in 1.4.0 was badly broken.

[matthew]

Hi,

Initially the code would not compile because I didnot have the ice.jar in the classpath. ( I had the directory in the classpath as mentioned in the documentation - 3.4 - Writing an Ice application with Java and it doesn't work).

.jar files have to be added individually to your CLASSPATH. After re-reading the documentation I think it could be a little more precise.

F:\iceproject>java -classpath classes;F:/IceJ-1.0.0/lib/ice.jar;. Server
Ice.SyscallException
error = 0
at Ice.PropertiesI.load(PropertiesI.java:171)
at Server.main(Server.java:37)

The hello world demo that comes bundled with the icej distribution expects to be run from the demo/Ice/hello directory since it loads a confiiguration file (config) from that directory - hence the error.

Regards, Matthew

[dipakyadav]

Mark/Mathew,

I don't see a config file under demo/Ice/hello. There is a config directory under ICEJ_ROOT.
I downloaded the following file IceJ-1.0.0.zip. Can you confirm if this zip file includes the config file under demo/Ice/hello.

Mark,
Thanks for the advice about upgrading Java. I will try to find time to do that.

thanks,
Dipak

[marc]

It's definitely in the .zip file:

[...]
6641 02-04-03 17:32 IceJ-1.0.0/demo/Ice/hello/Client.java
549 02-04-03 17:32 IceJ-1.0.0/demo/Ice/hello/Hello.ice
860 02-04-03 17:32 IceJ-1.0.0/demo/Ice/hello/HelloI.java
1638 02-04-03 17:32 IceJ-1.0.0/demo/Ice/hello/Server.java
1630 02-04-03 17:32 IceJ-1.0.0/demo/Ice/hello/build.xml
1117 02-06-03 18:56 IceJ-1.0.0/demo/Ice/hello/config <--- here it is
[...]

[dipakyadav]

Somehow I missed this file when I unzipped the zip file. I started the server and then ran the client and ended up with this error.

F:\IceJ-1.0.0\demo\Ice\hello>java -classpath classes;F:\IceJ-1.0.0\lib\ice.jar C
lient
usage:
t: send greeting as twoway
o: send greeting as oneway
O: send greeting as batch oneway
d: send greeting as datagram
D: send greeting as batch datagram
f: flush all batch requests
T: set a timeout
S: switch secure mode on/off
s: shutdown server
x: exit
?: help

==> t
Ice.ConnectFailedException
error = 0
at IceInternal.Network.doConnect(Network.java:205)
at IceInternal.TcpConnector.connect(TcpConnector.java :30)
at IceInternal.OutgoingConnectionFactory.create(Outgo ingConnectionFactor
y.java:254)
at Ice._ObjectDelM.setup(_ObjectDelM.java:322)
at Ice.ObjectPrxHelper.__getDelegate(ObjectPrxHelper. java:697)
at HelloPrxHelper.sayHello(Unknown Source)
at HelloPrxHelper.sayHello(Unknown Source)
at Client.run(Unknown Source)
at Client.main(Unknown Source)
Caused by: java.net.ConnectException: Connection refused: no further information

at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketC hannelImpl.java:334
)
at IceInternal.Network.doConnect(Network.java:177)
... 8 more

[marc]

Most likely this is because of the broken NIO in the JDK version you're using. Please upgrade to JDK1.4.1 and try again.

[dipakyadav]

I have downloaded java 1.4.1 and the sample seems to work for TCP. However if i use the option 'd' on the client it throws the following exception. Do I need to change something so that the server accepts UDP connections? I am attaching the trace of my server and client sessions.

warning: connection exception:
Ice.SocketException
error = 0
at IceInternal.UdpTransceiver.read(UdpTransceiver.jav a:150)
at IceInternal.Connection.read(Connection.java:676)
at IceInternal.ThreadPool.read(ThreadPool.java:654)
at IceInternal.ThreadPool.run(ThreadPool.java:604)
at IceInternal.ThreadPool.access$100(ThreadPool.java: 17)
at IceInternal.ThreadPool$EventHandlerThread.run(Thre adPool.java:886)
Caused by: java.net.PortUnreachableException
at sun.nio.ch.DatagramChannelImpl.receive0(Native Method)
at sun.nio.ch.DatagramChannelImpl.receiveIntoNativeBu ffer(DatagramChann
lImpl.java:185)
at sun.nio.ch.DatagramChannelImpl.receive(DatagramCha nnelImpl.java:174)
at sun.nio.ch.DatagramChannelImpl.receive(DatagramCha nnelImpl.java:122)
at IceInternal.UdpTransceiver.read(UdpTransceiver.jav a:141)
... 5 more
Caused by:

java.net.PortUnreachableException
at sun.nio.ch.DatagramChannelImpl.receive0(Native Method)
at sun.nio.ch.DatagramChannelImpl.receiveIntoNativeBu ffer(DatagramChann
lImpl.java:185)
at sun.nio.ch.DatagramChannelImpl.receive(DatagramCha nnelImpl.java:174)
at sun.nio.ch.DatagramChannelImpl.receive(DatagramCha nnelImpl.java:122)
at IceInternal.UdpTransceiver.read(UdpTransceiver.jav a:141)
at IceInternal.Connection.read(Connection.java:676)
at IceInternal.ThreadPool.read(ThreadPool.java:654)
at IceInternal.ThreadPool.run(ThreadPool.java:604)
at IceInternal.ThreadPool.access$100(ThreadPool.java: 17)
at IceInternal.ThreadPool$EventHandlerThread.run(Thre adPool.java:886)

[mes]

I can reproduce this problem. Thanks for the bug report!

[mes]

Dipak,

A fix for this problem will be included in the next release. If you would like a patch sooner, let me know.

Thanks again,
- Mark