title: Error in starting second JVM when one is already started
body: <p>I am developing a client-server software in which server is developed by python. I want to call a group of methods from a java program in python. All the java methods exists in one jar file. It means I do not need to load different jars.</p>
  
  <p>For this purpose, I used jpype. For each request from client, I invoke a function of python which looks like this:</p>
  
  <pre><code>def test(self, userName, password):
      Classpath = "/home/DataSource/DMP.jar"
      jpype.startJVM(
          "/usr/local/java/jdk1.7.0_60/jre/lib/amd64/server/libjvm.so",
          "-ea",
          "-  Xmx512m",
          "-Djava.class.path=%s" % Classpath)
  
      NCh = jpype.JClass("Common.NChainInterface")
      n = NCh(self._DB_ipAddress, self._DB_Port, self._XML_SCHEMA_PATH, self._DSTDir)
      jpype.shutdownJVM()
  </code></pre>
  
  <p>For one function it works, but for the second call it cannot start jvm.
  I saw a lot of complain about it but I could not find any solution for that. I appreciate it if any body can help.</p>
  
  <p>If jpype has problem in multiple starting jvm, is there any way to start and stop jvm once? The server is deployed on a Ubuntu virtual machine but I do not have enough knowledge to write for example, a script for this purpose. Could you please provide a link, or an example?</p>