Network Communication Error

pandacron · April 20, 2009, 6:04am

This problem has been pretty frequent now, and happens with any module when I try to connect online.

java.net.UnknownHostException: www.vassalengine.org
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at VASSAL.chat.HttpRequestWrapper.doGet(HttpRequestWrapper.java:90)
at VASSAL.chat.HttpRequestWrapper.doGet(HttpRequestWrapper.java:47)
at VASSAL.chat.DynamicClient.getServerConfig(DynamicClient.java:65)
at VASSAL.chat.DynamicClient.buildDelegate(DynamicClient.java:55)
at VASSAL.chat.DynamicClient$1.doInBackground(DynamicClient.java:85)
at VASSAL.chat.DynamicClient$1.doInBackground(DynamicClient.java:82)
at org.jdesktop.swingworker.SwingWorker$1.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at org.jdesktop.swingworker.SwingWorker.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Please help me fix this so I can enjoy this program.

uckelman · April 20, 2009, 9:56am

Thus spake “pandacron”:

This problem has been pretty frequent now, and happens with any module when I
try to connect online.

java.net.UnknownHostException: www.vassalengine.org
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown

Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Sou
rce)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown S
ource)
at VASSAL.chat.HttpRequestWrapper.doGet(HttpRequestWrapper.java:90)
at VASSAL.chat.HttpRequestWrapper.doGet(HttpRequestWrapper.java:47)
at VASSAL.chat.DynamicClient.getServerConfig(DynamicClient.java:65)
at VASSAL.chat.DynamicClient.buildDelegate(DynamicClient.java:55)
at VASSAL.chat.DynamicClient$1.doInBackground(DynamicClient.java:85)
at VASSAL.chat.DynamicClient$1.doInBackground(DynamicClient.java:82)
at org.jdesktop.swingworker.SwingWorker$1.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at org.jdesktop.swingworker.SwingWorker.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Sourc
e)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Please help me fix this so I can enjoy this program.

The next time this happens, check whether you can bring up
vassalengine.org in your web browser, and let me know the
result.

–
J.

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pandacron · April 22, 2009, 2:39am

On the browser it loads up fine, with no problems.

Ironically enough, this happened after the transition between 3.0 and 3.1. I already uninstalled and reinstalled the engine twice with no effect, so I doubt its an installation issue.

uckelman · April 22, 2009, 8:00am

Thus spake “pandacron”:

Hmm. So you’re not having a DNS problem, then.

Is it working for you now? We moved the game server to a different machine
yesterday.

–
J.

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uckelman · April 22, 2009, 8:16am

Is your firewall preventing VASSAL from connecting?

Brent_Easton · April 22, 2009, 8:23am

On 22/04/2009 at 1:16 AM uckelman wrote:

I can’t connect either.

I get the messages

Welcome to the VASSAL server
Send questions and comments to support@vassalengine.org

in the Chat window, but no rooms every appear. After 30 secs or so, the message

Lost connection to server

appears.

Nothing of interest in the errorlog.

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uckelman · April 22, 2009, 9:36am

Thus spake “Brent Easton”:

There’s something badly wrong with the game server, I think. A lot of
TCP connections get stuck in the CLOSE_WAIT state, which I believe means
that the connections aren’t being closed properly from the server end.

–
J.

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GR00V3R · April 22, 2009, 10:38am

Any further information about this issue?

uckelman · April 22, 2009, 10:41am

Thus spake “GR00V3R”:

We’re still looking into it.

–
J.

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GR00V3R · April 22, 2009, 11:07am

Cool. Good luck! Looking forward to finishing our current game of VASSAL40K:Epic

pandacron · April 22, 2009, 10:24pm

I just checked yesterday after learning that the servers have been switched.

Same result with the same message. Interesting enough, I can see what modules are running on Vassal, but I just can’t connect myself with everyone else to said modules and what not.

uckelman · April 22, 2009, 11:09pm

Thus spake “pandacron”:

Have you tried today? I fixed a serious problem with the server this
afternoon.

–
J.

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pandacron · April 22, 2009, 11:13pm

Tried it just now, exact same error.

Maybe I have to open a certain port in my firewall?

uckelman · April 22, 2009, 11:43pm

Thus spake “pandacron”:

I think it’s very likely that your firewall is blocking VASSAL. I have
no problem connecting to the server right now.

What OS are you using? If you’re running Windows, it’s possible that
Windows Firewall (which is under “Windows Security Center”, I think)
is blocking VASSAL. If you’re running Linux, I can also offer some
advice; for Mac OS X, you’ll have to ask somebody else. It’s also
possible that the firewall on your router is blocking you. A good test
is to briefly turn the firewall off and see if you can connect then
(but make sure your machine is up-to-date with security patches before
doing that).

–
J.

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markacres · April 23, 2009, 12:28am

In can’t connect either. It is 8:24 pm EST on Wednesday evening in the US. I get the “welcome to the vassal server message” - then nothing. No main room, no nothing.

I’m pretty sure this is not a firewall issue. I’ve been using Vassal for years with the same router and same firewall.

It is, however, a serious bummer. I really don’t want to learn cyberboard…

Brent_Easton · April 23, 2009, 12:35am

On 22/04/2009 at 5:29 PM markacres wrote:

It was definitely up after Joel had the server rebooted, (I last checked an hour or so ago), but it appears to be down again now.

B.

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KenC · April 23, 2009, 1:57am

It’s about 10:00 pm EDT and there are no connections to the server when I check on the web page (www.vassalengine.org) to any games, so I think it’s a server is borked issue…

Molokai · April 23, 2009, 3:36am

8:30 Pacific time, and the server’s been “down” for at least two hours (three, if it never recovered after KenC reported). I even got the “Lost connection to server” error message.

uckelman · April 23, 2009, 8:40am

Thus spake “Brent Easton”:

We hit some limit on the number of threads (but not the open files limit
this time) again somethime after I went to sleep. I’ve restarted the
server now. It should be good for another 12 or 13 hours now.

–
J.

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pandacron · April 23, 2009, 8:48am

For OS, I’m using Windows Vista 32 bit and after reading that it might be Windows’ firewall, I went over to make it an allowed program through both my Windows Firewall and my other firewall. It could be because of my router firewall, but unfortunately, I don’t have access to such things.

I did try just now and to no avail. Same error popped up.