I have an issue with some processes stuck in a D state on Ubuntu 10.04.3 LTS.
They have been in this state since Nov the 5th (today being December 6th). I understand these are uninterruptible sleep states often related to waiting for data from hardware such as a hard disk. This is a production server so rebooting is a very last resort, is anyone able to shed any light on what these processes might be?
This is the output for the D state items from ps -aux
www-data 22851 0.0 0.0 0 0 ? D Nov05 0:00 [2637.64]
www-data 26306 0.0 0.0 4008 12 ? D Nov05 0:00 ./2.6.37
www-data 26373 0.0 0.0 4008 12 ? D Nov05 0:00 ./n2
www-data 26378 0.0 0.0 4008 12 ? D Nov05 0:00 ./n2
This is output of ps axl | awk '$10 ~ /D/' for a little more info.
0 33 22851 1 20 0 0 0 econet D ? 0:00 [2637.64]
1 33 26306 1 20 0 4008 12 ec_dev D ? 0:00 ./2.6.37
1 33 26373 1 20 0 4008 12 ec_dev D ? 0:00 ./n2
1 33 26378 1 20 0 4008 12 ec_dev D ? 0:00 ./n2
Is there a way to kill these? Does having processes in this state when rebooting cause any issues?