Entropy ?

The symptoms were:

  • Sun JDK jarsigner freezing
  • ssh no longer working
  • Applications using crytography broken

So what the fuck…

strace jarsigner ...

Looks like /dev/random is empty ! How can /dev/random be empty ?!

man 4 random

Ok so my entropy pool was empty and I just rebooted to full it up. I think it happened because of a previous kernel crash.