Thread: Bizarre cRIO Server Errors (FDIO)
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Unread 02-16-2014, 05:05 PM
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Bizarre cRIO Server Errors (FDIO)
Short version: We just got these messages in our cRIO NetConsole after our robot mysteriously stopped accepting inputs. This is a recurring problem.

Code:
write error: : read error: : S_errno_EPIPE
S_errno_ETIMEDOUT
[NT] IOException message: Could not write all bytes to fd stream
[NT] IOException message: Error on FDIO read
[NT] 0x28e8d18 entered connection state: SERVER_ERROR
[NT] 0x28e8d18 entered connection state: SERVER_ERROR
[NT] Close: 0x28e8d18
Does anyone know why this is or what could cause it?

---------------------------------------------
Long version:

So, at our week 0 event yesterday our robot started bricking in the middle of the field. Still had communications and code, but it just stopped accepting inputs and stopped driving. The only clue we had to why this was happening was this message, every 100ms:

Code:
A timeout has been exceeded: RobotDrive... Output not updated often enough. ...in Check() in C:/WindRiver/workspace/WPILib/MotorSafetyHelper.cpp at line 117
We were able to reproduce the error today, and after waiting for a long time (about 8 minutes) we got this mysterious error output and everything started working again.

Code:
write error: : read error: : S_errno_EPIPE
S_errno_ETIMEDOUT
[[NNTT]]  IIOOEExxcceeppttiioonn  mmeessssaaggee::  CEorurlodr  noont  FwDrIiOt er eaaldl
 [[bNyTt]e s0 xt2o0 ef8dd 1s8t reenatme
r[eNdT ]c o0nxn2e8cet8ido1n8  setnatteer:e dS EcRoVnEnRe_cEtRiRoOnR
state: SERVER_ERROR
[NT] Close: 0x28e8d18
This was confusing, but I eventually figured out that it was two error messages outputting at the exact same instant, with every other letter belonging to a different message. When decoded, this was the result:

Code:
write error: : read error: : S_errno_EPIPE
S_errno_ETIMEDOUT
[NT] IOException message: Could not write all bytes to fd stream
[NT] IOException message: Error on FDIO read
[NT] 0x28e8d18 entered connection state: SERVER_ERROR
[NT] 0x28e8d18 entered connection state: SERVER_ERROR
[NT] Close: 0x28e8d18
What do these errors mean? What is FDIO? I have no idea where to begin with this error.