Please follow the documentation starting from Visual Studio Code (VS Code) Introduction

First thing to decide if you want to use client-side editing or server-side editing. server-side editing is more similar to working with InterSystems Studio.

Then, if you encounter problems, please come back and provide details on what you have done, what the problem you encountered, any error you get etc.

You should never concatenate query parameters in the query text, instead use placeholders and parameters.

Like this:

 set tQuery="SELECT ProvId, AllwOpenSchYN, IsAllwSchedYN FROM "_context.EpicClaritySerMycTable_" WHERE ProvId=? AND Market=?"
 set tStatement = ##class(%SQL.Statement).%New()
 set qStatus = tStatement.%Prepare(tQuery)
 set rset = tStatement.%Execute(context.ProvId,context.Market)
 do rset.%Next()
 if rset.%SQLCODE<0 { 
    $$$TRACE("SQL Query ["_tQuery_"] FAILED")
 } else {
    set tAllwOpenSchYN = rset.AllwOpenSchYN
    set tIsAllwSchedYN = rset.IsAllwSchedYN
    set tProvId = rset.ProvId
       
 }
 

Suggested reading: Dynamic SQL Best Practices

To me it looks that the remote system (147.185.133.137) it's connecting and then disconnect before sending any data.
Maybe setting Archive IO can provide some hint, but I'm not sure what happen with Archive IO when no data is received, like seems in this case.

I would try to test/connect using something like Postman and see if it works as expected.

Please note that %GlobalCharacterStream class in deprecated in favor of %Stream.GlobalCharacter class.

I'm puzzled by the line:

That method convert an object to a stream, but in fact you are passing a stream and it seems you expect it returns an object.

Also note that this two lines:

don't do anything, you can safely remove them.

To exchange (in/out) ObjectScript collections (arrays/lists) and streams to/from Java using the new $system.external interface you use the "magical undocumented" %getall() and %setall() methods.

You can get some sample code of using it in the Open Exchange project samples-dynamicgateway-java.

For example for streams you can try something like:

        w !,"TRY #"_$I(TEST)
        #Dim argc As %Stream.GlobalCharacter = ##Class(%Stream.GlobalCharacter).%New()
        do argc.Write($C(40))
        do argc.Write($C(41))
		Set bytesArrayIn=javaGate.new("byte["_argc.Size_"]")
		Do bytesArrayIn.%setall(argc)
        do test.testByteArr(bytesArrayIn)

Hi @Ashok Kumar T , you also need to use lock to properly implement ACID, something like:

LEARNING>lock +^myTracker("onSomething")
LEARNING>w ^myTracker("onSomething")
1
LEARNING>ts
 
TL1:LEARNING>s ^myTracker("onSomething")=12
TL1:LEARNING>w ^myTracker("onSomething")
12
TL1:LEARNING>trollback
LEARNING>w ^myTracker("onSomething")
1
LEARNING>lock -^myTracker("onSomething")
LEARNING>