question Re: Zeppelin service can not create folder - permission denied in Support Questions

Zeppelin service can not create folder - permission denied

dmitrynheng — Wed, 21 Dec 2016 23:44:30 GMT

Zeppelin service is running (I can use Zeppelin view) but Ambari reports it is down. Some investigation revealed this is probably due to the fact that when Zeppelin was starting it was not able to create a PID file. The exception was thrown

mkdir: cannot create directory ‘/var/run/zeppelin’: Permission denied

If I manually give all permissions to /var/run/ folder it starts to work properly.

It looks like I am not only one facing this issue as I saw other users already reported it. It is still not clear however what is a workaround for the problem? Giving permissions to /var/run/ folder only works as one time solution. As this folder is recreated on reboot, once I restart computer the problem starts over again...

Re: Zeppelin service can not create folder - permission denied

ddharam — Thu, 22 Dec 2016 00:23:51 GMT

Hi @dmitry

That is known OS issue.

What i did to circumvent this was:

On ambari server host. under /var/lib/ambari-server/resources/scripts you will find a script called configs.sh,

Change the value of the zeppelin PID directory as below:

STOP zeppelin Service.

/configs.sh -u $ambari_user -p $password get localhost $cluster_name zeppelin-env

id -a zeppelin

/configs.sh -u $ambari_user -p $password set localhost $cluster_name zeppelin-env "zeppelin_pid_dir" "/var/run/user/<zeppelin ID>/zeppelin"

mkdir -p /var/run/user/<zeppelin ID>/zeppelin

chown -R zeppelin:zeppelin /var/run/user

and then start the zeppelin service from ambari.

You should now see the new PID location under advanced zeppelin env

Please restart the server after this and see if the value holds.

Thanks,

Deepak

Re: Zeppelin service can not create folder - permission denied

jsensharma — Thu, 22 Dec 2016 00:24:26 GMT

@Dmitry Otblesk

it looks related to an already reported issue:

https://issues.apache.org/jira/browse/AMBARI-19264

Please use the workaround to manually assign the permission to the mentioned directory, until the fix.

mkdir -p /var/run/zeppelin
chown -R zeppelin:zeppelin /var/run/zeppelin

Re: Zeppelin service can not create folder - permission denied

rajkumar_singh — Thu, 22 Dec 2016 00:29:27 GMT

@Dmitry Otbleskcould you please check where your /var/run directory is mounted on tmpfs using

df -k /var/run

if it is on tmpfs that could cause this dir to remove once you reboot the node

if not then there is no harm of creating /var/run/zeppelin folder manually and give it permission as zeppelin:hadoop

Re: Zeppelin service can not create folder - permission denied

ncole — Thu, 22 Dec 2016 02:08:13 GMT

You can always customize the location in Ambari. The property zeppelin_pid_dir in "Advanced zeppelin-env" is where it's set

Re: Zeppelin service can not create folder - permission denied

dmitrynheng — Thu, 22 Dec 2016 04:25:40 GMT

@Nate

This looked like a nice and simple solution. However property zeppelin_pid_dir is disabled in Ambari. I can't enter any value there.

Please advise where else I can change this value?

Re: Zeppelin service can not create folder - permission denied

dmitrynheng — Thu, 22 Dec 2016 04:52:51 GMT

@ddharam

Thank you.

I however was not sure what "id -a zeppelin" means in your post? My best guess was that you suggested to find some zeppelin id. But how do I find it? The /configs.sh -u $ambari_user -p $password get localhost $cluster_name zeppelin-env command returned a pretty big output. And I was not sure where I look for zeppelin id?

Re: Zeppelin service can not create folder - permission denied

dmitrynheng — Thu, 22 Dec 2016 04:55:27 GMT

@Rajkumar Singh

My /var/run/ directory is indeed on tmpfs. So what is the workaround then?

Re: Zeppelin service can not create folder - permission denied

ncole — Thu, 22 Dec 2016 05:22:57 GMT

For properties that are disabled like that, you have to use the helper script configs.sh like so:

./configs.sh set localhost c1 zeppelin-env zeppelin_pid_dir /var/run/zeppelin/piddir

(Replace variables as required for hostname, cluster name, pid dir etc.)

After you set it, you may need to reload the config page to see the change and restart your services.

Thanks