title: Database JDBC Find out open connections/sessions?
body: <p>Is there anyway we can find out the open connections at a time when doing JPA operations for example.</p>
  
  <p>To be more clear, I am getting no buffer space available error. So I want to know if i can close down my connections in my code in order to avoid this error?</p>
  
  <p>Or if i can monitor it using some monitor tool what is happening etc.</p>
  
  <p>It is a help request, if you can help I will be thankful, if you can't help then why are you down voting? This discourages from asking for help.</p>