X2Go Bug report logs - #645
Connection is lost when using java programs

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Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

From: Johannes Boesl <j.boesl@adito.de>

To: <submit@bugs.x2go.org>

Subject: Connection is lost when using java programs

Date: Sat, 18 Oct 2014 16:00:32 +0200

Package: x2goclient
Version: 4.0.1.1-1ubuntu1

When I start IntelliJ IDEA via X2Go serveral problems occure. Often I 
just get:
X2Go - 52
The connection with the remote server was shut down.
Please check the state of your network connection.

Note that my network connection is just fine. Everything else keeps 
working. Using ssh with X11Forwarding that problem does not occur. I can 
restore the session afterwards till the next interrupt happens. 
Sometimes the application is in an state where the connection instantly 
shuts down when I try to reestablish it. It isn't possible to continue 
then and I have to kill the application in order to reconnect with x2go.
The other time X2Go just stops responding. I can't close my application 
nor do anyhting with it. I need to kill X2Goclient then and hope I can 
restore the session.
And then again sometimes when I restore a session all text is scrambled 
in the text editor. I need to stop the application then and restart it.

The described above happens regularly when using java applications. I'm 
using oracle java. Server is ubuntu 14.04 with stable X2Goserver 
4.0.1.18. Desktop is xfce. It happens running applcation directly and 
when I start java apps on the desktop. I tried it with the current 
version, too and after having troubles I switched to stable version.
/var/log/syslog and /var/log/cups/error_log doesn't contain anything 
suspicous.

Message #10 received at 645@bugs.x2go.org (full text, mbox, reply):

From: Александр Демидов <demidov@dimti.ru>

To: 645@bugs.x2go.org

Cc: mike.gabriel@das-netzwerkteam.de

Subject: X2go and jetbrains java applications

Date: Tue, 03 Feb 2015 00:38:40 +0300

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Similar bug http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=653 [1]
Bug report with Intellij IDEA:
http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=645 [2] 

Problem is exists. If you started jetbrains bussines applications - your
x2go session is unstable. 

Description of problem (from me) on russian:
https://debian.pro/1618#comment-29822 [3] 

May be similar bugs: 

http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=291 [4] 

http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=655 [5] 

Mike Gabriel says: 

> In general, we have observed several irregularities in NX that occur 
> with NX in rootless mode, but don't occur in desktop mode.

What is rootless mode and can i toggle my x2gosession to desktop mode? 

In bug report of problem x2go with eclipse
http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=291 [4]
Description solution for normally using eclipse: 

> So, is there a way to disable xrender extension ? (IIRC there was an
> option like that in NX Client) or any other workaround ?

And... 

> I've found a workaround, just add the following line in eclipse.ini :
> 
> -Dorg.eclipse.swt.internal.gtk.cairoGraphics=false

But in phpstorm.vmoptions not exists parameters "cairoGraphics"
(phpstorm unable to recognition that parameter for eclipse) 

Please. Help with solve that bug in x2go. Save my time of life (I five
months search another solutions for use phpstorm or intellij idea IDE in
remote x11-sessions. But not luck) 

Links:
------
[1] http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=653
[2] http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=645
[3] https://debian.pro/1618#comment-29822
[4] http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=291
[5] http://bugs.x2go.org/cgi-bin/bugreport.cgi?bug=655

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Message #15 received at 645@bugs.x2go.org (full text, mbox, reply):

From: Miguel Dilaj <miguel.dilaj@gmail.com>

To: 645@bugs.x2go.org

Date: Mon, 21 Dec 2015 17:00:36 -0300

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Hi all,

If you are using JDK8, and running the offending program using strace 
causes entries like this one:

     java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData 
cannot be cast to sun.java2d.xr.XRSurfaceData

Then it's not an X2Go bug, it's a Java bug. See 
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=7172749

Many Java programs are affected when run over X2Go.
The only workaround I've found is downgrading to JDK7, where the bug is 
not present.
Presumably Oracle will solve it in JDK9, but I don't have the time to 
extensively test it.
Hope that helps!
Kind regards,

Miguel

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Message #20 received at 645@bugs.x2go.org (full text, mbox, reply):

From: "Thomas Hamacher | sepus software" <tha@sepus.biz>

To: "645@bugs.x2go.org" <645@bugs.x2go.org>

Date: Wed, 17 Aug 2016 07:41:09 +0000

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When using IntelliJ this issue can be solved by disabling XRender.
You can do this with the flag

-Dsun.java2d.xrender=false

Simply add this to the <IDEA_HOME>/bin/idea.vmoptions and it works.

Maybe this thread also helps:
https://intellij-support.jetbrains.com/hc/en-us/community/posts/206240979-intellij-10-5-with-xrender-JDK-1-7-enabled?page=1#community_comment_206528075

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Message #25 received at 645@bugs.x2go.org (full text, mbox, reply):

From: "FedEx International Ground" <ben.bray@solarpack.org>

To: 645@bugs.x2go.org

Subject: Unable to deliver your item, #00345574

Date: Thu, 20 Oct 2016 07:37:02 +0000

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Dear Customer,

We could not deliver your parcel.
Shipment Label is attached to email.

Sincerely,
Ben Bray,
Operation Manager.

[FedEx_ID_00345574.zip (application/zip, attachment)]

Message #30 received at 645@bugs.x2go.org (full text, mbox, reply):

From: om123@gator4036.hostgator.com

To: 645@bugs.x2go.org

Subject: Parcel 005472061 delivery notification, UPS

Date: Wed, 5 Jul 2017 10:31:10 -0500

[Message part 1 (text/plain, inline)]

Dear Customer,

Your item has arrived at July 04, but our courier was not able to deliver the parcel.

Please check the attachment for complete details!

Warm regards,
 ,
UPS Chief Office Manager.

[UPS-Label-005472061.zip (application/zip, attachment)]

Message #35 received at 645@bugs.x2go.org (full text, mbox, reply):

From: webmaster@maccadin.com

To: 645@bugs.x2go.org

Subject: Problems with item delivery, n.001759394

Date: Tue, 25 Jul 2017 16:08:51 -0700

[Message part 1 (text/plain, inline)]

Dear Customer,

This is to confirm that your item has been shipped at July 24.

You can download the shipment label attached!

Kind thanks,
 ,
UPS Chief Station Manager.

[UPS-Package-001759394.zip (application/zip, attachment)]

Message #40 received at 645@bugs.x2go.org (full text, mbox, reply):

From: Τριανταφυλλιά Άννα Καττούλα <tkattoula@culture.gr>

To: "IN@TUG.NET" <IN@TUG.NET>

Subject: RE: Very Urgent

Date: Thu, 12 Oct 2017 13:10:05 +0000

[Message part 1 (text/plain, inline)]

Complement of the season, I wish to inform you about an urgent Transaction I have for you.
For more details, Please contact my private Gmail: mrsamychan6@gmail.com

Best Regards,

Mrs Amy Chan.

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