JavaGateway exception: <UNDEFINED>zGetJavaVersion+22^%Net.Remote.Service.1 ‽‽

Hello,

We are trying to connect to a database through a JavaGateway.

We observe that the JavaGateway reports:

Failed to start the Java Gateway server: ERROR #5002: Error de cache: <UNDEFINED>zGetJavaVersion+22^%Net.Remote.Service.1 *versionWithPrefix

We have checked that we do have the Java Home set:

/usr/java/jdk1.8.0_65

And we have seen the java files in the server:

We have read the code where the exceptions being raised:

/// Returns the numeric part of the Java version string (e.g. 1.8.0.1)
/// Rules of how the complete version string is formatted can be found here:
/// http://www.oracle.com/technetwork/java/javase/versioning-naming-139433.html
ClassMethod GetJavaVersion(javaHomeDir As %String = "", Output version As %String = "") As %Status
{
#dim tSC As %Status = $$$OK
#dim tCurrentDevice As %String = $IO Try {
// Build the java executable path
Set javaExecutable = "java"_$Select($$$isWINDOWS:".exe",$$$isVMS:".exe",1:"")
If (javaHomeDir'="") {
Set javaBinDir = ##class(%Library.File).SubDirectoryName(javaHomeDir,"bin")
Set javaBinDir = javaBinDir_$Select($$$isWINDOWS:"\",$$$isVMS:"",1:"/")
Set javaExecutable = ##class(%Library.File).NormalizeFilename(javaExecutable,javaBinDir)
}
Set tSC = ..GetJavaExecutableCommand(javaHomeDir,.javaExecutable)
Quit:$$$ISERR(tSC) // java -version prints to std err, not std out, so we need to redirect otherwise command pipe output will be empty
Set versionCmd = javaExecutable_" -version 2>&1"
Do ##class(%Net.Remote.Utility).RunCommandViaCPIPE(versionCmd,.pDevice,.pOutput) // Look for pattern : version "1.8.0.1
// where the double quote may optionally be replaced with a single quote or ommitted
Set regex = "version\s['""]?(\d+(\.\d+)+)"
Set pos = $Locate(pOutput,regex,1,,versionWithPrefix) // Get just the number from the previous pattern : 1.8.0.1
Set regex = "(\d+(\.\d+)+)"
Set pos = $Locate(versionWithPrefix,regex,1,,version)
} Catch (ex) {
Set tSC = ex.AsStatus()
} // Close command pipe, restore original device
Close:($Get(pDevice)'="") pDevice:"I"
Use tCurrentDevice Quit tSC
}

The exception is being thrown at the line:

Set pos = $Locate(versionWithPrefix,regex,1,,version)

Because of versionWithPrefix is undefined

It makes us wonder, why the regex is not getting the java version?

However if we test the regular expression at: https://www.freeformatter.com/java-regex-tester.html#ad-output

It shows that it should get the java version installed in the server:

So we wonder, how do we know if ensemble has read/write/execution rights to execute the command, which is being seen in the line:

// java -version prints to std err, not std out, so we need to redirect otherwise command pipe output will be empty
Set versionCmd = javaExecutable_" -version 2>&1"
Do ##class(%Net.Remote.Utility).RunCommandViaCPIPE(versionCmd,.pDevice,.pOutput)

How could we investigate and solve this?

We have read:

https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls...

https://community.intersystems.com/post/execute-server-commands-cach%C3%...