disk full, cannot delete files because safemode is on

[#1]

Hi,

It looks like i reached the memory limit for my sandbox. However i can't delete files since the Safemode is On. So i tried to turn it off manually with :

hdfs dfsadmin -safemode leave

but it makes nothing. From what i understood, it is because the memory is still full when i turn it off so the system immediatly goes back to safemode.

How can i delete some files?

[#2 · Accepted solution]

@Lubin Lemarchand

You first need to check which and all process are using more amount of memory. You can get using below command -

1. Issue command #top

2. press 'm'

3. check for top 2-3 processes in column '%MEM'

Also i will suggest to check free memory using 'free -m' command-

Most of the time memory us getting catched up. You can remove cache using below command -

#echo 3 > /proc/sys/vm/drop_caches

For deleting files you can , delete all log files for hadoop located in /var/log/hadoop/<application-name>

Do let me know if it works.

[#3]

@Sagar Shimpi

Thank you very much.

[#4]

@Lubin Lemarchand

Go to ambari dashboard and stop the services that you don't need and turn on the maintenance mode for them.

then to save time, restart the vm.

[#5]

@Neeraj Sabharwal

Thank you for your answer. Unfortunately i can't access ambari dashboard. For some reason, the username/password i've been using for one month doesn't work anymore. I thought it was related to this safemode thing but apparently it wasn't..