My QuickFIX client is complaining that the body length is not expected.
After checking, it is found that it receives a message which actually contains 2 messages (2 different MsgTypes <35>). Also, 2 BeginStrings <8>
Is it a valid message?
The error is reported by QuickFIX, instead of my own code.
Hence, it looks like an invalid message to me although I cannot find any official doc, saying that it is not allowed.
I would expect that QuickFIX could parse the messages as long as the body length of the first message is correct.
You could check if the body length is correct by using the following:
counting the number of characters in the message following the BodyLength (9) field up to, and including, the delimiter immediately preceding the CheckSum (10) field. ALWAYS SECOND FIELD IN MESSAGE. (Always unencrypted) For example, for message 8=FIX 4.4^9=5^35=0^10=10^, the BodyLength is 5 for 35=0^
Source: https://btobits.com/fixopaedia/fixdic44/index.html?tag_9_BodyLength.html
Its completely depends on your fix engine whether to support multiple messages in one go or not.
Using BodyLength[9] and CheckSum[10] fields.
BodyLength is calculated starting from field starting after BodyLenght and
before CheckSum field.
CheckSum is calculated from ‘8= upto SOH before the checksum field.
Binary value of each character is calculated and compared to the LSB of the calculated value to the checksum value.
If the checksum has been calculated to be 274 then the modulo 256 value is 18 (256 + 18 = 274). This value would be transmitted a 10=018 where
"10="is the tag for the checksum field.
Related
I am maintaining some existing code
I see this fragment:
msgsnd( $mQueue, pack("l! a*", length($msg), $msg), 0)
|| ... error handling ...
I would like to understand the call to pack() as the second argument to msgsnd.
I find the following documentation for msgsend
Calls the System V IPC function msgsnd to send the message MSG to the
message queue ID. MSG must begin with the native long integer message
type, be followed by the length of the actual message, and then
finally the message itself. This kind of packing can be achieved with
pack("l! a*", $type, $message) . Returns true if successful, false on
error. See also SysV IPC in perlipc and the documentation for
IPC::SysV and IPC::Msg .
This gives the second parameter to pack as $type, but does not explain what $type is. The code I'm trying to understand instead passes the message length.
What's going on? So far as I can tell the existing code is working reliably.
The application in question decided to use the type field to store the length of the message.
(This is rather odd, since the size of the message is already available to the reader.)
When the receiver request a message from the system, they may constrain the request to specific message types.
If msgtyp is 0, then the first message in the queue is read.
If msgtyp is greater than 0, then the first message in the queue of type msgtyp is read, unless MSG_EXCEPT was specified in msgflg, in which case the first message in the queue of type not equal to msgtyp will be read.
If msgtyp is less than 0, then the first message in the queue with the lowest type less than or equal to the absolute value of msgtyp will be read.
If the receiver specifies 0 for msgtyp, then the message type provided by the sender isn't used by the system, and can therefore be used to carry other information.
The man page for msgsnd says "The mtext field is an array (or other structure) whose size is specified by msgsz, a nonnegative integer value. Messages of zero length (i.e., no mtext field) are permitted. The mtype field must have a strictly positive integer value. This value can be used by the receiving process for message selection (see the description of msgrcv() below)."
Thus type is not used by sndmsg itself and the length that appears in the type field might or might not be used on the receiving side.
it creates a binary representation of the msg: len msg. Check it by:
perl -e '$a= "abcde"; print(pack("l! a*", length($a), $a))' | od -c
Gives:
0000000 005 \0 \0 \0 \0 \0 \0 \0 a b c d e
0000015
I have to test one Temp Sensitive IoT device API, Where Need to pass the Maximum and Minimum Temp in the Request Paylod, And the Response need to validate if the correct data is processed successfully. I have used the method .validate .validate("$.minVal", "(${minVal})") minVal = 20 to do a validation. But however the script is ended up with the exception as follow
FAILURE: Caused by: ValidationException: Validation failed: Values not
equal for element '$.maxVal', expected '(20.0)' but was '20
Request--> {"minVal": "20.0", "maxVal": "20.0"}
Response--> {"maxVal":20,"minVal":20,}
Note: if my Request Input is 20.12 its working fine.
Appreciate you guys help.
First of all remove the brackets () around ${minVal} variable. Secondly your minVal variable value is obviously a decimal number 20.0. The received value in Json is a non-decimal number 20. This is why the validation did fail - I think the error message is pretty clear.
I got some account issues in the SCN so I make a attempt here.
We switched to Unicode and got some issues with that. INFTY_TAB = PS+2. This coding gets an error that "the offset + length is exceeding".
I found some hints but couldn't really figure out how to fix this. And even when I manage to fix those errors I got a new error called 'Iclude-Report %HR_P9002 not found'. The IT is still there so is there something else I can check?
Definition of PS:
DATA: BEGIN OF PS OCCURS 0.
*This indicates if a record was read with disabled authority check.
data: authc_disabled(1) type c.
DATA: TCLAS LIKE PSPAR-TCLAS.
INCLUDE STRUCTURE PRELP.
DATA: ACRCD LIKE SY-SUBRC.
DATA: END OF PS.
TCLAS is a char(1) field.
This is the part where the error pops up:
INFTY_TAB = PS+2.
Error: I had to translate so sorry for some mistakes that could appear.
Offset and Length (=2432) exceed the length of the character based beginning (=2430) of the structure.
Depends on the length of INFTY_TAB. You have to explicitly set length:
INFTY_TAB = PS+2(length).
Official information is here. The important point to note is that the inclusion of SY-SUBRC (which is an INT4 field) places a limit to the range of fields you can access using this (discouraged) method of access.
ASSIGN field+off TO is generally forbidden from a syntactical
point of view since any offset <> 0 would cause the range to be
exceeded.
Although the sentence above is related to ASSIGN command, it is also valid for this situation.
The following step has followed:
telnet localhost 11211
set Test 0 100 10
get Test
CLIENT_ERROR bad data chunk
ERROR
set amit 2 2 2
get amit
CLIENT_ERROR bad data chunk
ERROR
In my case I was providing the value but the bytes were not exactly what I was mentioning in the set command, for the format of the command is:
set KEY META_DATA EXPIRY_TIME LENGTH_IN_BYTES
so for those who were just copy pasting the command without knowing as to why is it not storing the key and came here for the answer, this might help:
You need to provide the value of exactly the same bytes which you have mentioned in the last parameter of the set command
the following won't work:
also the following won't:
So when you enter the value it has to be exactly the same bytes, like this:
Although you do not ask a specific question, i presume you want to store a value.
You could test with the default example from the Memcached manual.
You define that you want to store a key, but don't specify a value.
The following example specifies that you want to save a key "tutorialspoint", no flags, timeout of 900 and reserve 9 bytes for a value. Those 9 bytes are specified in the next line: "memcached". In your example i don't see a value.
set tutorialspoint 0 900 9
memcached
STORED
get tutorialspoint
VALUE tutorialspoint 0 9
memcached
END
‘set Test 0 100 10’, then enter a value which the length is equal to 10。
the set command takes 4 arguments:
key - this is an arbitrary key you'll later use to retrieve the value
flag - use 0 for no flags
ttl - time to live in seconds. this is how long memcache will hold your value.
size - in bytes. Byte count of your value.
In my case I was neglecting to calculate the number of bytes and that was why I kept getting the "client error bad data chunk" error
If I try to replace or cancel an order I get a message
58=Conditionally Required Field Missing
and the next message contains
58=Invalid MsgType
Here are the logs:
Replacing an order (tgFZctx200U61 is my side. FG is an exchange.):
20170203-15:44:04.225 : 8=FIX.4.49=15135=G34=349=tgFZctx200U6152=20170203-15:44:04.22556=FG1=U6111=270071221=138=240=241=2700744=11640054=155=RTS-3.1760=20170203-18:44:04.20510=028
20170203-15:44:04.225 : 8=FIX.4.49=23235=849=FG56=tgFZctx200U6134=352=20170203-15:43:56.98137=572984433198=F:572984433526=$01$11=270071241=2700717=exec-201702031001027616150=E39=E55=RTS-3.17461=FXXXXX54=138=140=2151=114=06=060=19700101-00:00:00.00010=213
20170203-15:44:04.275 : 8=FIX.4.49=11535=j34=449=tgFZctx200U6152=20170203-15:44:04.27556=FG45=358=Conditionally Required Field Missing372=8380=510=065
20170203-15:44:04.275 : 8=FIX.4.49=33335=849=FG56=tgFZctx200U6134=452=20170203-15:43:56.98237=572984753198=F:572984753526=$01$11=270071241=27007453=1448=tgFZctx200U61447=C452=317=3355471052150=539=01=FZ00U6155=RTS-3.1754=138=240=244=116400.00000336=9291151=214=06=060=20170203-15:43:56.98920008=-922337203685372211120018=[51000-3355471052-0]10=100
20170203-15:44:04.285 : 8=FIX.4.49=10335=349=FG56=tgFZctx200U6134=552=20170203-15:43:57.03345=4371=372373=1158=Invalid MsgType372=810=164
cancelling an order:
20170203-15:26:19.178 : 8=FIX.4.49=15435=F34=349=tgFZctx200U6152=20170203-15:26:19.17856=FG11=270061237=57286383038=141=2700644=116470.0000054=155=RTS-3.1760=20170203-18:26:19.17810=013
20170203-15:26:19.188 : 8=FIX.4.49=20735=849=FG56=tgFZctx200U6134=352=20170203-15:26:11.92437=572863830198=F:572863830526=$01$11=270061241=2700617=exec-201702031001027615150=639=655=RTS-3.17461=FXXXXX54=138=140=2151=114=06=010=239
20170203-15:26:19.418 : 8=FIX.4.49=11535=j34=449=tgFZctx200U6152=20170203-15:26:19.41856=FG45=358=Conditionally Required Field Missing372=8380=510=070
20170203-15:26:19.418 : 8=FIX.4.49=33335=849=FG56=tgFZctx200U6134=452=20170203-15:26:11.92437=572863830198=F:572863830526=$01$11=270061241=27006453=1448=tgFZctx200U61447=C452=317=3354681208150=439=41=FZ00U6155=RTS-3.1754=138=140=244=116470.00000336=9291151=014=06=060=20170203-15:26:11.93120008=-922337203685267353520018=[51000-3354681208-0]10=080
20170203-15:26:19.418 : 8=FIX.4.49=10335=349=FG56=tgFZctx200U6134=552=20170203-15:26:12.16445=4371=372373=1158=Invalid MsgType372=810=161
Best regards, Mikhail
"Conditionally Required Field Missing" means you are trying to extract an optional field that isn't present. (It's not required by the DD, but the user's logic expects it to be there, hence "conditionally required".)
The first 35=j message says:
45=3 - sequence number of message where these happened
58=Conditionally Required Field Missing
372=8 - type of message where this happened
380=5 - same code as explained in 58
Unfortunately, the message doesn't say which field is the problem, but basically, you're doing this (forgive my pseudocode):
var x = msg.getSomeOptionalField()
but you need to do this:
var x = null;
if (msg.checkIfSomeOptionalFieldIsPresent())
x = msg.getSomeOptionalField();
In order to parse your own FIX messages use FIXimate.
58 is a text field. The text after 58 in this case is the error message. The tag value pair 372=83 means: The message referred to (i.e. the missing tag) is tag 83.
Tag 83 is the sequence number of message within report series. FIXimate says that 83 is "Used to carry reporting sequence number of the fill as represented on the Trade Report Side."
This is your FIX engine sending an error back to the exchange. You can tell by looking at the SenderCompID and TargetCompID for each message.
You send a message:
20170203 15:44:04.225:8=FIX.4.49=15135=G34=349=tgFZctx200U6152=20170203-15:44:04.22556=FG
You get an Execution Report (35=8, probably acknowledging order cancellation/replace):
20170203-15:44:04.225 : 8=FIX.4.49=23235=8 49=FG 56=tgFZctx200U61lo9
You send an Business Reject (35=j):
20170203-15:44:04.275 : 8=FIX.4.49=115 35=j 34=4 49=tgFZctx200U61 52=20170203-15:44:04.275 56=FG 45=358=Conditionally Required Field Missing372=8380=510=065
What this last message coming in from the exchange is, is hard to tell without further analysis, but it most likely the execution report for the replaced order. It seems to have been sent 1 ms after the original execution report.
Your FIX engine expects certain data to be present within the messages. The expectation is set in your data dictionary, an xml file which should be provided by your counterparty. Sometimes (like now) there are errors in this file and you have to open it up, find the message in question (in this case the original execution report), and tell your data dictionary not to expect tag 83.
That should clear things up. Let me know if it doesn't work.