Is it possible to abort system start during SYSTEM^%ZSTART?

If some conditions are not met, I want to shut down IRIS instead of continuing with the startup.

In Interoperability productions Inbound Adapters extract and separate retrieval logic from actual payload processing, which is left to a BS.

Currently what I have is:

How do I detect that sync mirror backup is caught up to primary? Or at least close to caught up.

I'm executing the code on a backup.

How do I use ANSI escape codes to produce green text in InterSystems IRIS terminal?

I have defined a class with a dynamic object property:

Class test.Dyn Extends %Persistent
{

Property json As %DynamicObject;

/// do ##class(test.Dyn).test()
ClassMethod test()
{
  do ..%KillExtent()
  for len = 100, $$$MaxStringLength - 1, $$$MaxStringLength, $$$MaxStringLength+1, $$$MaxStringLength *2 {
    set sc = ..save(len)
    write "Len: ",len, " Result: ",$case($$$ISERR(sc), $$$YES: $System.Status.GetErrorText(sc), : "OK"),!
  }
}

ClassMethod save(len)
{
  set json = {}
  set stream = ..getStream(len-8) // -8 because {"a":""}
  do json.%Set("a", stream, "stream")
 
  set obj = ..%New()
  set obj.json = json
  quit obj.%Save()
}

ClassMethod getStream(len)
{
  set stream = ##class(%Stream.TmpCharacter).%New()
 
  if len<$$$MaxStringLength {
    do stream.Write($tr($j("",len)," ","A"))
  } else {
    for i=1:$$$MaxStringLength:len {
      do stream.Write($tr($j("",$$$MaxStringLength)," ","A"))
    }
    do stream.Write($tr($j("",len-i)," ","A"))
  }
  quit stream
}
}

The issue I encounter is that if a length of a serialized json property is more than 3641144 symbols, the object fails to save with the following error (either MAXSTRING or STRINGSTACK):

Length: 100 Result: OK
Length: 3641143 Result: OK
Length: 3641144 Result: OK
Length: 3641145 Result: ERROR #5002: ObjectScript error: <MAXSTRING>%GetSerial+1^%Library.DynamicAbstractObject.1
Length: 7282288 Result: ERROR #5002: ObjectScript error: <STRINGSTACK>%GetSerial+1^%Library.DynamicAbstractObject.1

Is there a workaround? I need to store moderately large jsons (10-15 Mb) and dynamic object properties allow for a very convenient access.

$ZSTORAGE is set to -1.

I'm using Deferred Response.

After I have obtained a token, is it possible to retrieve initial request somehow?

Alerts are automatic notifications triggered by specified events or thresholds being exceeded.

InterSystems Documentation

I have a Business Service connected to a machine with ~100 sensors. BS receives sensor values once a second.

Several conditions determine if a Business Service should raise an alert (it's a list of: sensor id > threshold).

I have a BPL Business process which always processes messages - mainly it waits for responses since downstream systems are seriously async.

I need to update this process.

Wwould the existing instances of this Business Process complete correctly after the update?

My BPL changes would result in:

1. New S method in the Thread class
2. New OnResponse method in the context class

Both changes are in the middle of the process, so there are S/OnResponse methods before and after my change.