Couldn't do assignment on a tickerplant?

Community Support
1

Hi,

I opened a new q instance which worked as a client to a tickerplant process (the server).

I entered :   h: hopen `: server_name:port_number  in the client side q console to open an IPC handle to the tickerplant.

Then I entered in      h “1+1”     and got a result of 2, which means the connection was successfully built up. 

However, when I tried to do assignment with     h “a: 1+1” , an error message came out saying “'noupdate: . aaaa”


Then I opened a new handle which connected to a hdb port instead of a tickerplant port, assignment could be done perfectly.


I am confused about this. By going through this page http://code.kx.com/wiki/Errors, I find the “Noupdate” error is somewhat caused by threads-related problem. However I was just doing assignment, could anyone please help me with this?

Any help and suggestions are sincerely appreciated!


Best


Xinyu

2

Hi Xinyu,

Can I ask what command line arguments you started the tickerplant with? From the error code and what you have described, it sounds as though it was started with the -b option. This blocks write access, which could explain why you can do a 1+1 evaluation, but not assign a:1+1

The reference page for command line -b : http://code.kx.com/wiki/Reference/Cmdlineb

Thanks,
Matthew
AquaQ Analytics

3

To: Matthew McAuley , Kdb+ Personal Developers

If it’s a tickerplant, it’s also possible there is something in the .z.pg handler that prevents updates (perhaps those from an unknown host)

?So if there aren’t any clues in the command line as Matthew suggested, you can check there (using h".z.pg")


From: Matthew McAuley

Sent: Wednesday, March 2, 2016 11:56
To: Kdb+ Personal Developers
Reply To: personal-kdbplus@googlegroups.com
Subject: [personal kdb+] Re: Couldn't do assignment on a tickerplant?


Hi Xinyu,

Can I ask what command line arguments you started the tickerplant with? From the error code and what you have described, it sounds as though it was started with the -b option. This blocks write access, which could explain why you can do a 1+1 evaluation, but not assign a:1+1

The reference page for command line -b : http://code.kx.com/wiki/Reference/Cmdlineb

Thanks,
Matthew
AquaQ Analytics

On Wednesday, 2 March 2016 17:44:12 UTC, Xinyu Gai wrote:
Hi,


I opened a new q instance which worked as a client to a tickerplant process (the server).

I entered : h: hopen `: server_name:port_number in the client side q console to open an IPC handle to the tickerplant.

Then I entered in h "1+1" and got a result of 2, which means the connection was successfully built up.

However, when I tried to do assignment with h "a: 1+1" , an error message came out saying "'noupdate: `. `aaaa"

Then I opened a new handle which connected to a hdb port instead of a tickerplant port, assignment could be done perfectly.

I am confused about this. By going through this page http://code.kx.com/wiki/Errors, I find the "Noupdate" error is somewhat caused by threads-related problem. However I was just doing assignment, could anyone please help me with this?

Any help and suggestions are sincerely appreciated!


Best

Xinyu

--

Submitted via Google Groups

4

Hi Matthew,

As the tickerplant was not started by me, I don’t know the option it started with. But I tried h"\_" and it returned 1b, probably that’s the reason. Thank you so much for the help!

Best,

Xinyu

5

Hi David,

Thanks a lot for your reply. I tried “\_” and it returned 1b. So I guess the client write access was blocked at start. Also I tried your suggestion, it returned  


{id:nextid;logBefore[id;x;z;.proc.cp];logAfter[id;x;.proc.cp;@[y;z;logE..

which I don’t really understand. Is there any further information in the above result? Thanks!

Best,

Xinyu