This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I launch in a very fast succession 2 jnlp files which have the same component extensions inside. Every now and then I receive errors pointing to concurrent access problems relative to the extension jnlp file (extension jnlp file not found in cache, file locked by other process, file not found).