Output console prints text... in reverse

[Ethan E]

This is something that happened seeming out of the blue, not right after immediately re-imaging the cRIO or anything like that.

When I download code to the robot, everything is perfectly normal until this line

[cRIO] [Squawk VM] Version: 2011 FRC, Jan 6 2011, 09:58:39
[cRIO] ,RF 1102 :noisreV ]MV kwauqS[
[cRIO] c5e5aae2x0:DIUG erawdraH AGPFtoS AGPF
[cRIO] 9cc16b110a358669a8a1f

After this point, anything written to the console, like print statements, exceptions, etc., are all backwards. Occasionally there are also letters omitted from the output console, e.g.

System.out.println("Hello");

might show up as

[cRIO] ollH

The only thing I've seen print forward after this point was an error message about an FTP thread being closed (paraphrasing from memory).

Has anyone else been having a problem anything like this? I'm using Java and running Netbeans 6.9.1 on Mac OS X 10.6.6

Edit:
I tried this out on a team mate's computer, everything works fine for him.

[Jeremy Germita]

We have had a similar problem. The main difference is that it outputs gibberish, not just in reverse.

The proper output loop is as follows:

[cRIO] LEFT CENTER RIGHT
[cRIO] true true true



[cRIO] te ue truLEFT CER IGHtru t truLEFT CER tru tr e
[cRIO] LEFT CER IGHtru t e
[cRIO] LEFT TERT
[cRIO] te tru e
[cRIO] LEFT CER RIGrue
[cRIO] LEFT CR IGHtru te tr
[cRIO] LEFT TERRIG
[cRIO] tr rue trLEFT TER RI
[cRIO] tr e trLFT CNTET
[cRIO] ue tr t
[cRIO] LEFT EN HT
[cRIO] ue tru t
[cRIO] LEFT CENT GHTtru tr
[cRIO] LEFT TE RI
[cRIO] tr tru tLEFT ENR IGHtru t e
[cRIO] LEFT ENR IGHtru e rueLEFT CER IGHtru t trLEFT CENT tru ue
[cRIO] LEFT NTE R
[cRIO] tr ue truLEFT CENTER RIGHT
[cRIO] true true ue
[cRIO] LEFT CRIG
[cRIO] tr e rueLEFT CENT HT
[cRIO] ruetru t
[cRIO] LEFT ENT T
[cRIO] tue tru trLEFT CENR IGHtr truLEFT CER RIG
[cRIO] tue t e
[cRIO] LEFT CTER R
[cRIO] true tru t
[cRIO] LEFT CER IGHtru t ue
[cRIO] LEFT CENIGHtru t ue
[cRIO] LEFT CETER RI
[cRIO] tr rue te
[cRIO] LEFT ENT T
[cRIO] te tru te
[cRIO] LEFT CEER IGHtru e LEFT CTER RI
[cRIO] tr e truLEFT NTE RGTtru tr ue
[cRIO] LEFT CNTE RI
[cRIO] tr ruetruLEFT NTEHT
[cRIO] ue tru t
[cRIO] LEFT CER IGHtru t e
[cRIO] LEFT CEN HT
[cRIO] ue ue rueLEFT CENTER RIGHT
[cRIO] t e rueLEFT CENER RIGtru t ue
[cRIO] LEFT CENER IGHtru t ue
[cRIO] LEF TER RT
[cRIO] ue tru trLEFT TER RIT
[cRIO] te rue tr
[cRIO] LEFT CENR RIGtr e rueLEFT CEER RIGtru ue
[cRIO] LEFT CNTE RI
[cRIO] trrue trLEFT CENER RIGtru rueLEFT CER GHTrue t
[cRIO] LEFT CEERRIGtru e ue
[cRIO] LEFT R IGHtru t ue
[cRIO] LEFT CENT HT
[cRIO] ruetru e
[cRIO] LEFT CEN GHTrue tr e
[cRIO] LEFT CNTE RT
[cRIO] ttru t
[cRIO] LEFT TERRIGtru e truLEFT CENT HT
[cRIO] ue tru e
[cRIO] LEFT ENT T
[cRIO] te rue trLEFT NTE R
[cRIO] t ue truLEFT NTE RI
[cRIO] tr ue e
[cRIO] LEF NTE R
[cRIO] tr ue truLEFT CNTE T
[cRIO] ttru t
[cRIO] LEFT CETER RI
[cRIO] tre rue trLEFT CEN GHTru e ue
[cRIO] LEFT ENT RT
[cRIO] te tr ue
[cRIO] LEFT EN GHTrue tr e
[cRIO] LEFT ENT GHTrue tr te
[cRIO] LEFT CE GHtru te rueLEFT CR RIGtru rueLEFT CENR IGHtru e rueLEFT CEN GHTruetr ue
[cRIO] LEFT CER IGHtru tue truLEFT R RIGtru ue rueLEFT ENT HT
[cRIO] ue tru te
[cRIO] LEFT CER IGHtru t e
[cRIO] LEFT CEER IGHtr ue LEFT CENTER RIG
[cRIO] tre rue trLEFT ER GHTrue tr
[cRIO] LEFT CENR IGHtru tr e
[cRIO] LEFT GHTruetru t
[cRIO] LEFT CNT GHTrue tr e
[cRIO] LEFT CER IGHtru t e
[cRIO] LEFT CER RIGtru ue LEFT CER RI
[cRIO] tue tru trLEFT CR IGHtru e rueLEFT CENT RHT
[cRIO] ue tru trLEFT NTET
[cRIO] tru tr ue
[cRIO] LEFT CTERRIHT
[cRIO] tr e rueLEFT CER RIGT
[cRIO] te tru te
[cRIO] EFT CENT RT
[cRIO] ue ruue
[cRIO] LEFT CTER RItru e trLEFT CENT HT
[cRIO] ruetru t
[cRIO] LEFT NTE T
[cRIO] te ue t
[cRIO] LEFT CE RI
[cRIO] t e rueLEFT CER IGHtru t ue
[cRIO] LEFT CENT GHTru tr
[cRIO] LEFT NT RI
[cRIO] tr ue LEFT ENT T
[cRIO] true tr e
[cRIO] LEFT NTE RT
[cRIO] te ruetruLEFT CEN HT
[cRIO] ue ruetr
[cRIO] LEFT C RIT
[cRIO] t retruLEFT CR RI
[cRIO] tr e rueLEFT NTE RI
[cRIO] truetru tLEFT CENTE RI
[cRIO] tr ue
[cRIO] LEFT CENERRIGtru e rueLEFT CENTER RIGHtre tru trLEFT CNTE RT
[cRIO] te ruetruLEFT CE GHTruetru
[cRIO] LEFT TER RT
[cRIO] tue rue trLEFT TER RI
[cRIO] tr ue truLEFT CENT IG ue truLEFT CEN HT
[cRIO] rue tr te
[cRIO] LEFT CEER RI
[cRIO] ruetru t
[cRIO] LEFT NE RI
[cRIO] tre ruetruLEFT CR IGHtru ue


I'd like to hear of a fix for this...

[sjspry]

@jeremypg399: Your problem might be because of multithreading. As hard to miss as it sounds, are you printing in two places?

[Jeremy Germita]

I am simply polling a digital input. It is only printing in one place

[sjspry]

Would you please post your code? I don't think this will be easy to diagnose without it.

Sorry to hijack the OP's thread! Perhaps you could PM me the code, instead of cluttering up this one?

[Robototes2412]

dude, crazy win

my suggestion to combat it is to either make a function that inverses strings you print, or reformat crio and pray

[sjspry]

Hmm, I recently encountered something similar which I believe to be an error with however the cRIO handles sending/receiving information. I send some text, but only get less than half of it. Not sure what's going on, will try re-flashing it, this HAS to be a problem with the cRIO. This same exact code didn't work before, but something similar did.

[derekwhite]

This is a known issue, thought to affect only the new router when connected wirelessly. This is due to an issue with the router and an issue with the cRIO that only affects console output. We are working on a fix.

In the meantime, if you see this on the old access point or connected via ethernet cable, please post the details.

[sjspry]

This is a known issue, thought to affect only the new router when connected wirelessly. This is due to an issue with the router and an issue with the cRIO that only affects console output. We are working on a fix.

In the meantime, if you see this on the old access point or connected via ethernet cable, please post the details.

I am connected via ethernet. This happens via the router or when connected directly.

[jhersh]

I am connected via ethernet. This happens via the router or when connected directly.

Please double check this. Are you certain you see this reversed output behavior even when you are ONLY connected with an Ethernet cable?

-Joe

[BradAMiller]

I am connected via ethernet. This happens via the router or when connected directly.

Have you been able to verify this? Sometimes if you have both the wired and wireless interfaces connected at the same time, the system chooses the wireless and then you'd see the problem.

We expect to see a fix for the wifi related issue in the next Java update.

We've never been able to reproduce the bug when hard wired.

[sjspry]

Yeah, it's like you said, I happened to be on wireless. The problem I had with characters disappearing is a problem with how DataInputStream.readUTF() (or, rather UTFReader or something) reads data. It always expects 16-bit UTF characters, for some reason.