Details
Description
If you try to daemonize a process that is incorrectly configured, it will die quite quickly. However, the daemonization function will still try to renice it even if it's down, leading to something like this for my namenode:
-> % bin/hdfs --daemon start namenode ERROR: Cannot set priority of namenode process 12036
It'd be more user-friendly instead of this renice error, we said that the process couldn't be started.