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User mentioned (1): @Slaw
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First of all a thank you to @Slaw. Indeed consuming the output logs fixed the error. You may Note I switched to using a ProcessBuilder. I tried that before but without consuming the output that didn't work. The new Kotlin code is the following:

class ScriptExecutor {

companion object{

    @JvmStatic
    fun execute(s: String){

        val process = ProcessBuilder("/bin/sh", s).start()

        // Stream output and error logs
        val output = BufferedReader(InputStreamReader(process.inputStream))
        val error = BufferedReader(InputStreamReader(process.errorStream))

        // Print output in the background (optional)
        Thread {
            output.lines().forEach { println(it) }
        }.start()

        Thread {
            error.lines().forEach { println(it) }
        }.start()


    }

}}

The outputs get printed to the console and the consuming is outsourced to another thread.

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