Linux low on entropy can cause certain operations to be very slow. Encryption operations need entropy to ensure randomness. Entropy is generated by the OS when you use the keyboard, the mouse or the disk. If an encryption operation is missing entropy it will wait until enough is generated.

three options

  • use rngd service (include wls_install::urandomfix class)
  • set java.security in JDK ( jre/lib/security in my jdk7 module )
  • set -Djava.security.egd=file:/dev/./urandom param