Queued Request Limit (Stateless) -

I have stateless webservice calls setup and I am trying to trigger the Queued Request Limit (Stateless) limitation which is supported to be 5. However it seems that no matter how many concurrent sessions I kick off the calls simply queue up and do not trigger this exception. Does anyone have any insight on whether this limitation is not enforced?
Some more information: all the calls are using the same CRMOD service account, but they spawn off 2 sessions on the server. I kicked of 20 concurrent sessions which are sharing these 2 on the server.
Is it possible that this Queued Request Limit (Stateless) only kicks in if you are using different usernames?

Hi jeffry;
We have a "Feature Request" form where you can vote on popular existing ideas or add a new one of your own, limiting the responses is on the list for you to vote for:
https://adobeformscentral.com/?f=XnF-KJVCovcEVQz9tZHYPQ
We do not publish a road map of features at this point.
Thanks,
Josh

Similar Messages

How to measure un-queued requests

Hi.
We have a web logic application that has to serve a lot of throughput.
To prevent timeouts on the client side, I configured it so that the work manager that takes in the requests is limited to a certain amount. The max-threads is configured comparably to the DB pool capability, and the limit is set in such a way so that we prevent the server to queue requests. Queuing proves deadly for us, as by the time the request actually makes to the executor, the client is gone.
The problem I'm seeing now, is that there doesn't seem to be a way to actually measure how many requests have been turned away. The only suggestion I got so far was to look into access logs, but I actually had to turn them off, as they are a performance issue on themselves, with the volume of requests we are having.
Knowing how many requests are falling off is relatively important, so that we can understand when there is time to add more app nodes.
Thanks!
Pawel.

Hi,
You may please check the configuration part of SLA. This might help you : http://www.renet-web.net/2009/07/21/slas-made-easy-in-sap-solution-manager/
The 'Date of first response' is the time when message is taken for processing and the other one is the time when message truns to have the status 'Finished or Resolved'.
If you are intended to build a program to determine the time for the different status changes, you might be intersted in checking the Extras--Change Documents in your message.
Rajeev

Azure SQL DB Basic Edition Preview: "Session Request Limit Reached" Stuck and Doesn't Clear - SQL DB Bug?

Edit: I have updated the below to reflect that it took four hours for the database to unblock. This looks like a bug to me. SQL Server seemed to believe there were 30 running sessions with open requests nearly four hours after the client
side connections were terminated (and thus in the process blocking SQL Server from accepting new connections).
Problem
I am running a preview "Basic" edition SQL DB and have hit a problem with Azure SQL DB blocking database access for an extended time period.
I was running a test, which was running normally for several hours (loading small batches of data), then suddenly lots of connection timeouts (error type 1 below). My workload was constant over the whole test - but if the server was suddenly under
pressure, I accept this might happen - no problem with me so far.
Upon retrying, the errors then changed to request limit exceeded (error type 2 below).
I am surprised I hit the limit in the first place, since the test code closes the SQL Connection on a timeout error and reopens. (In C#, the code is wrapped in a using{} to ensure prompt connection closure). Still, perhaps the amount of concurrent
work on the server did momentarily hit this limit. Perhaps fair enough on this point too.
BUT: Surprisingly, nearly four hours later, I was still unable to connect to the database - it was refusing new connections. Either from my worker role or from the Azure Management Website. The Management Window, upon trying to connect,
failed with exactly the same text as error type 2 below.
Further, sys.resource_stats (from the master db, which is still accessible) is reporting that there were 30 active sessions, 30 active workers (see extract below) for four afters after the test ended. Even though during this time period the Azure Cloud
Service that was generating the SQL requests was stopped too (so the client side of any open requests were long since dead). Also,
the CPU, Log Write and Phys Data Read columns in sys.resource_stats are all showing 0 for the four hours after the test ended. This to me suggests a fault condition that isn't clearing server-side.
Why was the database unavailable for four hours? Why did Azure believe that there were 30 open requests? (each request was an insert of 1000 rows, each of 400 bytes, i.e. pretty small so no way should they take this long to process).
PS. To be clear, none of the above is a complaint. I completely accept that the service in in preview, different SLA, etc. I am writing to a) check that I haven't missed anything and b) if this is a bug, to report it.
Appendix
Error Type 1
System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Error Type 2
SqlException: Resource ID : 1. The request limit for the database is 30 and has been reached. See 'http://go.microsoft.com/fwlink/?LinkId=267637' for assistance.
Metrics
The following is an extract from sys.resource_stats for the affected time period. SQL Server seems to wrongly believe/report that there are 30 pending requests between 6:20 and 10:45. It thus blocks any further requests during this time. There
were NO client connections during this time, either new or previously opened.
start time
end time
sku
session count
worker count
avg cpu
avg phys data read
avg log write
07 Jun 11:15
07 Jun 11:20
Basic
0
0
0
0
0
07 Jun 10:50
07 Jun 10:55
Basic
0
0
0.5
0
0
07 Jun 10:40
07 Jun 10:45
Basic
30
30
0.01
0
0
07 Jun 09:35
07 Jun 09:40
Basic
30
30
0.02
0
0
07 Jun 09:20
07 Jun 09:25
Basic
30
30
0
0
0
07 Jun 09:10
07 Jun 09:15
Basic
30
30
0.01
0
0
07 Jun 08:40
07 Jun 08:45
Basic
30
30
0
0
0
07 Jun 08:20
07 Jun 08:25
Basic
30
30
0.01
0
0
07 Jun 08:10
07 Jun 08:15
Basic
30
30
0.01
0
0
07 Jun 07:55
07 Jun 08:00
Basic
30
30
0
0
0
07 Jun 07:25
07 Jun 07:30
Basic
30
30
0.01
0
0
07 Jun 07:15
07 Jun 07:20
Basic
30
30
0
0
0
07 Jun 07:05
07 Jun 07:10
Basic
30
30
0.01
0
0
07 Jun 06:55
07 Jun 07:00
Basic
30
30
0
0
0
07 Jun 06:45
07 Jun 06:50
Basic
30
30
0.15
0
0
07 Jun 06:20
07 Jun 06:25
Basic
30
30
0.01
0
0
07 Jun 06:15
07 Jun 06:20
Basic
30
30
0.22
0
0
07 Jun 06:10
07 Jun 06:15
Basic
26
26
0.13
0
0
07 Jun 06:05
07 Jun 06:10
Basic
20
20
0.14
0
0
07 Jun 06:00
07 Jun 06:05
Basic
13
13
0.12
0
0
07 Jun 05:55
07 Jun 06:00
Basic
7
7
0.12
0
0
07 Jun 05:50
07 Jun 05:55
Basic
1
1
54.04
0
93.47
07 Jun 05:45
07 Jun 05:50
Basic
1
0
1.4
0
2.06
07 Jun 05:40
07 Jun 05:45
Basic
1
1
55.17
0
88.35
07 Jun 05:35
07 Jun 05:40
Basic
1
0
52.05
0
90.01
07 Jun 05:30
07 Jun 05:35
Basic
1
1
54.95
0
90.1
07 Jun 05:25
07 Jun 05:30
Basic
1
1
56.38
0
89.82
07 Jun 05:20
07 Jun 05:25
Basic
1
0
52.15
0
90.19
07 Jun 05:15
07 Jun 05:20
Basic
1
0
52.76
0
87.86

Hi Chris,
Thanks for testing the new Basic edition and for reporting this issue. Without some more investigation it is hard to tell what exactly has happened here.
To be able to take a closer look I would need some more information from you. Could you please reach out to me via email (firstname DOT lastname AT microsoft DOT com)? I will then let you know what additional information we and will kick-off
the investigation.
Thanks,
Jan

Message getting stuck in XBQO queue - Time limit exceeded

Hi All,
We have a BPM scenario in our project (on PI 7.0 SP18), where bundle of PEXR2002 Payment IDocs are received as a single flat file. This file is then consumed by the BPM, to split the message into multiple payments using Java Mapping.
However, when we get an IDoc file of size greater than 5 MB (more than 500 IDocs), the message gets stuck in XBQO queue and eventually giving a SYSFAIL with the message "Time limit exceeded". Could you please let us know if you have encountered a similar issue and are aware of a possible solution.
Any pointers to this will be really appreciated.
Thanks & Regards,
ROSIE SASIDHARAN

H Rosie,
1) Goto SXMB_ADM-> Integration Engine Configuration->Parameter EO_MSG_SIZE_LIMIT->possible values 0 - 2,097,151 (KB)
The parameter EO_MSG_SIZE_LIMIT enables serial processing of messages of a particular size. This applies for messages with the quality of service Exactly Once (EO). If the message is larger than the parameter value, the message is processed in a separate queue.
2) Goto SXMB_ADM-> Integration Engine Configuration->Parameter HTTP_TIMEOUT->possible values n Seconds, where n is a whole number.
The parameter Specifies the timeout for HTTP connections (time between two data packages at line level). This value overrides the system profile parameter icm/server_port_n (for example, icm/server_port_0 : PROT=HTTP, PORT=50044, TIMEOUT=900). If you do not set the parameter HTTP_TIMEOUT or if you set the parameter to 0, then the setting for the system profile parameter is used.
See SAP Note 335162 for sysfail issue....
Hope these will help u....
Regds,
Pinangshuk.

Concurrent requests limit in JRC

Hi,
I understand that there is a limit of five concurrent requests in CR 2008 JRC. Is there any way to increase this limit? I am trying to generate PDF in multi threaded environment and would like to see the options for better scalability.
Thanks,
Ashok

The CRJ objects aren't thread-safe, so you'd have to ensure each thread has independent ReportClientDocument instances.
That being stated, there's currently no way to increase the Concurrent Process Licensing (CPL) limit with CRJ.
The CR4E isn't meant for volume batch processing of reports - BusinessObjects Enterprise or Crystal Reports Server Embedded (OEM/Partner solutions) are.
Sincerely,
Ted Ueda

CFMAP - multiple markers - error: the webpage has gone over the requests limit in too short a period

Google Maps has a restriction on how many map markers can be requested per second. The limit is ten per second. I am looking for the "best Practice" on how coldfusion developers address this limitation. I am looking to display a map of the US with 125 location markers. Ideally I would like to cache the map for retrieval for both efficiency purposes and to avoid depletion of the total requests that Google allows per day. Thanks in advance for any insight that you can lend.

One reference is https://developers.google.com/maps/documentation/business/articles/usage_limits#limitexcee ded where a solution in Python is given to pause a loop if an OVER_QUERY_LIMIT error is received. I agree that there are maps out there with hundreds of markers. My mission is figuring how they are doing this.

Requests Limit in Access

Does anyone know if the amount of requests Access can handle at one time is 10 or not? Since Thurs., our web site has been crashing a lot and we think it might be from the amount of traffic we're getting and Access can't keep up, or that Access is limited to only 10 requests at a time. Is there a way to change this limit?
     We have 3 Access databases we're using with Cold Fusion. We're thinking that all the requests are adding up and Access just can't handle everything at once. Everyone within our company uses 2 of the databases and the 3rd one is our web site. Search engines seem to keep making requests to our web site all day long. When you add up all these requests, it's probably over 10 for sure at a time.
       Has anyone experienced this before? We've been told to switch over to SQL instead of Access. Hopefully this would solve everything and the server wouldn't crash anymore.
When I created my last database called, ECO Register, I remember creating it in Access 2007 and I saved it as .accdb extension, but I could not get connected to it in the Cold Fusion Administrator, so I made it .mdb instead. If our Access databases were the newer version, could that maybe handle more requests at one time? Or do we have to install a newer driver for Access on Cold Fusion to handle more requests? I did see in the Adminstrator page there is a Microsoft Access driver type and a Microsoft Access with Unicode driver type option. What are the differences? I see that we have an SQL driver type in the Administrator page. Do we have to do a lot of set up to make that work? Or do I just connect my Access database to that SQL driver and then update the pages to use SQL?
      If anyone could help me out, that would be great. Thanks.
Andy

We've been told to switch over to SQL instead of Access.
You should. Microsoft itself says Access is not designed for server use. Web applications are multi threaded. So when you incorportate a desktop application (which is not designed to handle concurrent users) weird things can start to happen. You should upgrade to SQL Server which is designed for use on servers. Not to mention it is much more powerful.
Or do I just connect my Access database to that SQL driver and then update the pages to use SQL?
No, you need to migrate your Access database to SQL Server first. If you do a search there are plenty of Access to SQL Server migration guides.
Message was edited by: -==cfSearching==-

Queue consumer limit

Here is the scenario:
-simple producer app, sending in to a Queue a lot of simple text messages
-there are 3 MDB's listening to the same (!) queue and dumping message to server.log
by checking output of glassfish server.log it seems that MQ is using only 2 of those MDB's at a time (2 simultaneous consumers).
How (w/o switching to Topic) would it be possible to increase simultaneous processing capabilities of glassfish (v2 UR1 Final) bundled MQ ?
/mareks

Queue gets a lot of messages sent in by (multiple) clients. The question is why glassfish/mq is processing only 2 consumers only at a time ? Tried playing with maxNumActiveConsumers set to -1 and consumerFlowLimit to 1 - same thing.
/mareks

BOXI queues requests?

We are using BOXI R2 in our production environment,
Our application stack involves a load balanced WAS cluster, which calls BO for the crystal reports. the reports is populated using our custom web service and served to the application layer.
We noticed a weird behavior while we were load testing our application. We ran a test for 300 users for 15 minutes. Once the test was over, we had around 2000 requests which failed (did not get any response back). FYI, the request waits for 3 minutes before timing out.
When we checked the web service logs, we could see that the web service was still getting requests even though the test had stopped.
So we brought down our WAS nodes. and the web service was still getting served with requests.
Is anyone aware of any queueing mechanisms in BOXI. We are in the process of understanding this behavior.
If there is a queueing mechanism, is there any place where more details can be found on this?

The Page Server spawns child processes to handle report requests.
So say you trigger several hundred report refreshes at one time, then kill your app server that sent the request.
The Page Server would happily spawn child requests up to the max specified in the Central Management Console, and the child processes will process the report till the first page of the report is formatted (if getting an HTML view) or the entire report is formatted (if getting binary format such as PDF or Word).
It won't know that the requester is dead.
Sincerely,
Ted Ueda

ISE Alarm: Warning: Profiler Queue Size Limit Reached

Anyone know what this error means and more importantly, is it anything to really be concerned about? We started receiving this today for one of our PSNs and have been getting the alert every five minutes. There hasn't been any 'known' impacts from this but it's very annoying and the Cisco documentation is a little vague.
Thank you....

Hmm, I am sorry but I will have to ask more questions:
1. You mentioned that your PSNs are behind a load balancer, but are the nodes in a "node group?" If they are not you should place them in a node group. If they are you will need to split them as the max recommended nodes per node group is 10.
2. If the nodes are indeed in a node group are they all L2 adjacent?
3. If your deployment consists of VMs and not physical appliances, can you confirm that both the adequate CPU/RAM are allocated and reserved for the VMs?
Here are also some recommendations:
1. If possible, move to IOS sensor on all of your switches and disable the probes that will no longer be needed.
2. If #1 is not possible check the configurations on your NADs and where Device Sensor is configured you should remove, IP Helper and SNMP Query based configs. This will prevent duplicate information from being sent to the PSNs
3. Look to completely eliminate SNMP Traps based configurations for ISE. That probe along with Netflow and the Span probes are pretty heavy hitters
4. Make sure that you are using Device Sensor on your WLCs as well
5. Use the latest patch
6. Get a support case going with Cisco and have them take a look :)
For more info you should take a look at the following Cisco Live Sessions:
BRKSEC-3697 and BRKSEC-3699
Thank you for rating helpful posts!

Web Service Stateless Session request using JDeveloepr 11g (JAX-RPC)

I have been trying to consume web Service by sending Stateless Session request to the system.
I generated the Java Proxy using JDeveloepr 11g, using JAX-RPC.
As it is Stateless I need to add following SOAP Header for authentication
<soap:Header>
<wsse:Security soap:mustUnderstand="1">
<wsse:UsernameToken>
<wsse:Username>[email protected]</wsse:Username>
<wsse:Password Type="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wssusername-
token-profile-1.0#PasswordText">adminOnDemand</wsse:Password>
</wsse:UsernameToken>
</wsse:Security>
</soap:Header>
To do this I tried clientuntcredentialprovider as suggested by most of the post online, but found of little help as the server complained of not be able to find the User Name and Password.
To add to the mess problem I hit was I was not able to View the SOAP Request or Response sent by JDeveloper hence not helping me in debugging the same
I have tried it on XML SPY by manually adding SOAP Header to the SOAP request and was able to find the response, but I have not been able to do the same using the JDeveloper 11g IDE.
I have tried HTTP Analyzer assuming it might help, but unfortunately due to the huge size of WSDL, tool hanged my PC each time I loaded it.
I know it should be fairly straight forward but just feel like missing something.
Has anybody has got this thing working ?
Regards,
Deepak

What exactly you mean that since your request is stateless you must send a Username token?
Also, can you put here the code you used to populate the UNT.
Finally, if possible, can you zip and email your wsdl, the http analyzer should be able to handle wsdls, even if they are huge.
Thanks,
Vishal

Limit on the number of simultaneous requests using SP.WebProxy.

I've created a SharePoint hosted app and have just added a license check to the app. The license check is done by making a call to a REST endpoint using SP.WebProxy. The app is implemented as an App Part, and as such there can be many instances
of the app on a page.
Everything works fine if there is only one or two instances of the app on the page. As soon as I add a third instance to the page however, the third instance starts failing the license check with the error "This app has reached its outbound
request limit."
Obviously this is happening because all three instances are hitting the SharePoint Proxy service at the same time. It would appear as though there is a limit to the number of simultaneous calls that a particular app is allowed to make.
The problem is that I can't find any documentation regarding this limit. The error that I'm getting does not get a single hit in Google. Is this a limit that can be increased with a setting in web.config?
Does anybody know what documentation I can consult regarding this?

Hi Mikhail,
Unfortunately no, we never did get any information on this. In our case since the data that we are querying is pretty much static, we ended up caching the data in a SharePoint list in the app web. We only access the WebProxy if the data is not cached. That
workaround solved the problem for us.
Good luck.

R12 Restrict Parallel Concurrent Requests Per User to a Limit.

Hi everyone,
Is it possible to restrict parallel concurrent requests per user to a limit.
e.g. UserA sending concurrent requests to submit 15 heavy reports one after another. After 2 minutes he feels free. Now 15 reports running in parallel are heavy enough to take system's performance down. Is there a way to restricting parallal reports by a single user to 5.
Waitning........
Regrads,
M. Farooq Khan.

Hi,
Please check the profile optiion
Concurrent:Active Request Limit
Thanks,

Best way to configure redelivery limit value for a Queue

Hello,
My doubt is related to configuring the JMS Redelivery Limit property from Weblogic 9.2 Server.
We must support redelivery attempts in our queue, with a redelivery delay of 30s. So, we have set the queue's Redelivery Limit property to -1, via Console Configuration:
Settings for My_DQueue -> Delivery Failure -> Redelivery Limit = -1
The consumer of that queue is a MDBBean, which extends org.springframework.ejb.support.AbstractJmsMessageDrivenBean.
The producers to that queue are weblogic.jms.extensions.WLMessageProducer.
That queue has an error queue configured as Error Destination.
Then, the WLMessageProducer is the one who specifies that value:
WLMessageProducer messageProducer = (WLMessageProducer)queueSession.createProducer(queue);
messageProducer.setRedeliveryLimit(5);However, we will not be able to ensure that all message producers pointing that queue will specifiy that redelivery limit. This may lead us to problems, as default queue Redelivery Limit is set to -1, and messages without specified redelivery limit would be redelivered indefinitely.
I'd like to know if there is any way to specify a MAXIMUM redelivery limit value for a JMS queue. For example: fixing that limit to 10. If producers specify by themselves a redelivery limit lower than such value, that limit is applied to messages. Otherwise, the configured default limit value is used.
Another option we have considered is to include, in the MDB's onMessage() method, a validation of the "JMS_BEA_RedeliveryLimit" message property:
This validation would check whether no redelivery limit is configured in the Producer, and would forward such messages directly to the error queue, from the MDB, when the "JMSXDeliveryCount" outnumbers our fixed value:
public void onMessage(Message message) {
   try {
      if(message.getIntProperty("JMS_BEA_RedeliveryLimit")<0){
         //MESSAGE FOUND WITHOUT REDELIVERY LIMIT SPECIFIED BY PRODUCER.
         //POTENTIAL DANGER OF BEING REDELIVERED INDEFINETELY
         int deliveryCount = message.getIntProperty("JMSXDeliveryCount");
         if(deliveryCount>10){
             //CAN I FORWARD MESSAGE TO ERROR DESTINATION?But we were not able to found such examples to achieve this
Thanks in advance!
Joan Esteve

Hi Joan,
I just double-checked, and as far as I can tell the options for setting a redelivery limit include programmatically on the Producer or by configuring an override on the Destination. Unfortunately, you need the override to only take effect if the delivery limit hasn't already been set. (If we had a default deliverylimit configurable on our connection factory, this would have done the trick.)
I think you've already hit upon the solution: your consumers can check each received message's JMSXDeliveryCount and act accordingly. It's fine for a consumer to use the JMS_BEA_RedeliveryLimit property see if the Limit has been set by a producer, and then check JMSXDeliveryCount to check the delivery count, but I'm not sure if the JMS_BEA_RedeliveryLimit property is set in older versions (8.1 may not have it for example).
As a refinement, you may want to use the WLMessageProducer forward() API. This is an alternative to send() that preserves the message-id and timestamp of a consumed message. I don't think forward() allows any modification of the consumed message before it's forwarded.
Hope this helps,
Tom
Edited by: Tom B on Feb 22, 2013 10:03 AM

Obtain Queue Data Type

I am working my way through my first Producer Consumer vi and have two questions.
1. The data I am enqueuing is x,y,z acceleration samples of type Waveform. The snippet shows how I set the data type in Obtain Queue. It's rather ugly and disturbing even though it appears to work. Is there a more elegant and beautiful way to set the data type?
2. The sample rate of the accelerometer is 5120 Hz. The DAQmx Read buffer is of lenght 1024 samples. Hence, it takes 200 [ms] to fill the buffer. I've set the metronome to 100 [ms] to ensure that the Producer doesn't miss any samples. That means the Producer While Loop will spend a good portion of its time waiting. Right? Does having wait cost anything?
In LabVIEW's ProducerConsumerExample.vi the sample rate is 10000. The Read buffer size is 1000. And the metronome is set to 100 [ms]. The sample rate of the device comes from the hardware device in the cDAQ. The 100 [ms] interval comes from the PC. Won't there be a mismatch? I'd like to understand this before I set my metronome to 200 [ms].
Solved!
Go to Solution.

Arizona_Joe wrote:
So, can you shed some light on the behavior of the While Loop you mentioned that does not have a metronome and is is paced by DAQmx? I would think it would do a lot of spinning.
It isn't spinning because it is waiting inside of the DAQmx Read for N samples to be gathered. That is not an instant data request. It takes time to gather those samples. That length of time is dependant on your sample rate and how many samples you are requesting. So because it is waiting inside of the DAQmx Read, there is no need to add an additional wait. Let the DAQmx Read limit the loop rate.
It is actually just like the consumer loop for the Producer Consumer. The reading of the queue will limit the rate at which that loop runs. Therefore, it needs no wait.
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