Hi @Anil Mathew 
It seems to be the concurrent users license behaviour.

There is a 10 seconds "grace period".
Check your kind of licence.

As I use IRIS, with a "core base" license, I haven't encountered this problem.
I never tested by myself, but maybe the parameter "UseSession = 1" can help you.
Take a look in the %CSP.REST class documentation.

Hi @Davi Massaru Teixeira Muta ,

As far as i know, there is no lock log history.

This is understandable, as there would be a lot of them on heavily used systems.

If you can modify the application code, may be you can add log trace when this error happens.

With ^$LOCK you can retrieve the owner of a lock.

Example:

Lock +^my.global(1)
Write"Owner is : ", ^$LOCK($Name(^my.global(1)),"OWNER")
;Owner is : 5216

Even if you recover the PID, analysis can be difficult if the process no longer exists at the time you perform the analysis.  Maybe add something like this for logging (executed with a job):

/// Start this method in job ex:/// Job ##class(pkg.ClassName).TraceLock($Name(^my.global))ClassMethod TraceLock(lockname As%String) As%Status
{
    Set sc = $$$OKSet pid = ^$LOCK(lockname, "OWNER")
    If pid = "", $QLength(lockname)>0 {
        ; check if the node is fully lockedSet pid = ^$LOCK($QSubscript(lockname,0), "OWNER")
    }
    
    If pid = "" {
        ; no data ...Return sc	
    }
    
    Set key = $Increment(^debug.locktrace)
    
    Set^debug.locktrace(key, "from pid") = $ZParent; Just to keep a trace of the pid started this jobSet^debug.locktrace(key, "info") = $ZDateTime($Horolog, 3, 1) _ " The lock " _ lockname _ " owner is "_pid
    
    Set process = ##CLASS(%SYS.ProcessQuery).Open(pid)
    If$IsObject(process) {
        Set^debug.locktrace(key, "owner-UserName") = process.UserName
        Set^debug.locktrace(key, "owner-StartupClientIPAddress") = process.StartupClientIPAddress
        Set^debug.locktrace(key, "owner-StartupClientNodeName") = process.StartupClientNodeName
        Set^debug.locktrace(key, "owner-CurrentLineAndRoutine") = process.CurrentLineAndRoutine
        Set^debug.locktrace(key, "owner-Routine") = process.Routine
    }
    
    Return$$$OK; Exemple of result:;^debug.locktrace=1;^debug.locktrace(1,"from pid")=12964;^debug.locktrace(1,"info")="2024-11-22 12:25:25 The lock ^my.global owner is 5216";^debug.locktrace(1,"owner-CurrentLineAndRoutine")="";^debug.locktrace(1,"owner-Routine")="shell";^debug.locktrace(1,"owner-StartupClientIPAddress")="127.0.0.1";^debug.locktrace(1,"owner-StartupClientNodeName")="TRM:";^debug.locktrace(1,"owner-UserName")="_SYSTEM"
}

Hope this help.

Lorenzo.
 

Hi @Scott Roth !

Take a look to this page

Lorenzo.

Hi @Dmitry Maslennikov ,

Yesterday I experienced this kind of problem with web socket.
To limit the license usage, I did this : 

Class dc.journalindexer.WebSocket Extends%CSP.WebSocket
{

Method OnPreServer() As%Status
{
    Do%session.Login("wsuser",,1)
    Set..SharedConnection = 1; ... some lines of codeQuit sc
}

Method OnClientMessage(
	data As%String = "",
	closeAs%Integer) As%Status
{
    ; force logout and EndSession on disconnect from clientIf$Get(close) = 1 {
        Do%session.Logout()        
        Set%session.EndSession = 1Do..EndServer()
    }

	Quit0
}
}

Hello @Michael Davidovich ,

Did you try to override OnPreDispatch ?
Also you can configure your web application to use a subclass of %CSP.SessionEvents and override OnStartRequest, OnEndRequest .

Set Application = "/csp/YourWebApp"Do##class(Security.Applications).Get(Application, .p)
Set p("EventClass") = "YourCSPEventsClassName"Set sc = ##class(Security.Applications).Modify(Application, .p)