swing application error on BBB

Hi all

I am getting following error while i run my java swing app through linux script, but no error while executing by java -jar myapp.jar on shell, is there any clue to resolve this error

java.awt.eventqueue3.run

java.security.accesscontroller.doPrevilidged(native method)

java.security.protectiondomain$javasecurityaccessimpl.dointersection

java.awt.eventqueue.dispatchevent

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clem57 over 10 years ago +1

What is your linux script source?
clem57 over 10 years ago in reply to ramanc51 +1

ramanc51 Key message is HeadlessException (Java Platform SE 6) and No X11 DISPLAY variable was set, but this program performed an operati...s it. This means you need X windows environment properly set…
mconners over 10 years ago in reply to ramanc51 +1

The one who owns the display is the user that is logged in. You are starting a service as one of the system users, I'm not sure which one, because I don't have access to your system. X11 will prevent users…

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clem57 over 10 years ago

What is your linux script source?
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ramanc51 over 10 years ago in reply to clem57

i saved my script in /usr/bin/myscript.sh

#!/bin/bash
java - jar /home/debian/myapp.jar

trying to execute from my myapp.service that saved on /usr/lib/systemd/system and symliked to /etc/systemd/system
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ramanc51 over 10 years ago in reply to clem57

Thank you Clem, issue is solved by the first link reference, this issue is solved by adding following lines in my myscript.sh

export DISPLAY=:0.0

cd /home/debian // my myapp.jar is here

su - debian -c ´java -jar myapp.jar´
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ramanc51 over 10 years ago in reply to mconners

Thank you Mike, your guldens was useful to know actual error that i am facing, as you said export DISPLAY is must to run my app.jar without x11 error, finally i found the user own the display by Clem reference then issue is resolved.
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clem57 over 10 years ago in reply to ramanc51

Great news! Please share your project here when you get the chance!
Clem
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ramanc51 over 10 years ago in reply to clem57

sure, but on later i share my project, i need on more guide i want to load my usb-serial converter with specified name that given below, i created my 81-usb-serial.rules in /etc/udev/rules.d, but this rules is not loaded, it always load ttyUSB0/1 or ttyUSB1/0

SUBSYSTEM=="tty", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="7523", ATTRS{serial}=="DJJHDH", SYMLINK+="USB-RS232"
SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{serial}=="A6008isP", SYMLINK+="USB-RS422"
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mconners over 10 years ago in reply to ramanc51

Raman Arumugam wrote:

su - debian -c ´java -jar myapp.jar´
Duh. Of course, I can't believe I did't think of that . I guess I was too focused on the X issues. Glad you got it sorted out.

Mike
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clem57 over 10 years ago in reply to ramanc51

OMG! ramanc51
Please do not change because this area is related to driver code that which expects names to be in a known form. Linux is a beast allowing tons of things to change, Even though it can, you must be a developer knowing what source does to change it.
Clem
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mconners over 10 years ago in reply to clem57
clem57 , It seems like adding the symlink attribute should be OK.

Refer to this guide and search for symlink
Writing udev rules
"
KERNEL=="hdc", SYMLINK+="cdrom cdrom0"
The above rule is probably more typical of the types of rules you might be writing. It creates two symbolic links at /dev/cdrom and /dev/cdrom0, both of which point at /dev/hdc. Again, no NAME assignment was specified, so the default kernel name (hdc) is used."

Mike
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mconners over 10 years ago in reply to ramanc51

ramanc51 Since this is a different issue, it should probably be moved into a new thread. That helps people find it in the future.

Mike
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ramanc51 over 10 years ago in reply to mconners

OK, i posted on separate thread as udev rules error on BBB with more details
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ramanc51 over 10 years ago in reply to mconners

Hi mike
i tried with different parameter on my rule but no luck, i got error while test my device /dev/ttyUSB0 using udevadm test /dev/ttyUSB0 as follows

unable to open device /sys/dev/ttyUSB0, but no file like ttyUSB on /sys/dev folder.
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ramanc51 over 10 years ago in reply to mconners

Hi mike
i tried with different parameter on my rule but no luck, i got error while test my device /dev/ttyUSB0 using udevadm test /dev/ttyUSB0 as follows

unable to open device /sys/dev/ttyUSB0, but no file like ttyUSB on /sys/dev folder.
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