The RoboRIO is suddenly not accepting/running code

Technical Java
1

We get the following log when trying to build code:

Buildfile: C:\Users\Programmer\workspace\Robot-Code\build.xml
Trying to override old definition of task classloader
clean:
   [delete] Deleting directory C:\Users\Programmer\workspace\Robot-Code\build
   [delete] Deleting directory C:\Users\Programmer\workspace\Robot-Code\dist
compile:
    [mkdir] Created dir: C:\Users\Programmer\workspace\Robot-Code\build
     [echo] [athena-compile] Compiling src with classpath=C:\Users\Programmer/wpilib/java/current/lib/WPILib.jar:C:\Users\Programmer/wpilib/java/current/lib/NetworkTables.jar to build
    [javac] Compiling 8 source files to C:\Users\Programmer\workspace\Robot-Code\build
jar:
     [echo] [athena-jar] Making jar dist/FRCUserProgram.jar.
    [mkdir] Created dir: C:\Users\Programmer\workspace\Robot-Code\dist
    [mkdir] Created dir: C:\Users\Programmer\workspace\Robot-Code\build\jars
     [echo] [athena-jar] Copying jars from C:\Users\Programmer/wpilib/java/current/lib/WPILib.jar:C:\Users\Programmer/wpilib/java/current/lib/NetworkTables.jar to build/jars.
     [copy] Copying 2 files to C:\Users\Programmer\workspace\Robot-Code\build\jars
      [jar] Building jar: C:\Users\Programmer\workspace\Robot-Code\dist\FRCUserProgram.jar
get-target-ip:
     [echo] Trying Target: roboRIO-3617.local
     [echo] roboRIO found via mDNS
dependencies:
     [echo] roboRIO image version validated
     [echo] Checking for JRE. If this fails install the JRE using these instructions: https://wpilib.screenstepslive.com/s/4485/m/13503/l/288822-installing-java-8-on-the-roborio-using-the-frc-roborio-java-installer-java-only
  [sshexec] Connecting to roboRIO-3617.local:22
  [sshexec] cmd : test -d /usr/local/frc/JRE
deploy:
     [echo] [athena-deploy] Copying code over.
      [scp] Connecting to roboRIO-3617.local:22
      [scp] done.
  [sshexec] Connecting to roboRIO-3617.local:22
  [sshexec] cmd : killall netconsole-host
  [sshexec] killall: netconsole-host: no process killed
  [sshexec] Remote command failed with exit status 1
      [scp] Connecting to roboRIO-3617.local:22
      [scp] done.
      [scp] Connecting to roboRIO-3617.local:22
      [scp] done.
     [echo] [athena-deploy] Starting program.
  [sshexec] Connecting to roboRIO-3617.local:22
  [sshexec] cmd : . /etc/profile.d/natinst-path.sh; /usr/local/frc/bin/frcKillRobot.sh -t -r;
  [sshexec] start-stop-daemon: warning: killing process 3031: No such process
BUILD SUCCESSFUL
Total time: 7 seconds

This log has not changed despite reimaging the RoboRIO. We’re getting desperate here. Any ideas?

2

The code is deploying fine, the problem is likely that your code is crashing. Do you get any message on the Driver Station messages window or in rioLog after deploying?

3

We also have tried it with the sample code, and with known working code. The RIOLog says

ERROR Unhandled exception instantiating robot edu.cold.logic.Robot java.lang.ExceptionInInitializerError at [java.lang.Class.forName0(Native Method), java.lang.Class.forName(Class.java:259), edu.wpi.first.wpilibj.RobotBase.main(RobotBase.java:197)]
4

There should probably be more lines after that which will tell you what the real error is.

5

There isn’t. It’s weird but if you get an error in one of your constructors (e.g. a subsystem constructor) it throws this error. Could you post your code here?

6

My team is also having the same issues with the RoboRio and I was wondering how you solved it, assuming that you have. If you have I would appreciate some advice on how you did so and what the problem ended up being. Thanks in advance.

7