I have enabled logs in the xml file: yarn-site.xml
, and I restarted yarn
by doing:
sudo service hadoop-yarn-resourcemanager restart
sudo service hadoop-yarn-nodemanager restart
I ran my application, and then I see the applicationID
in yarn application -list
. So, I do this: yarn logs -applicationId <application ID>
, and I get the following:
hdfs://<ip address>/var/log/hadoop-yarn/path/to/application/ does not have any log files
Do I need to change some other configuration? Or am I accessing the logs the wrong way?
Thank you.
yarn application -list
will list only the applications that are either in SUBMITTED, ACCEPTED or RUNNING state.
Log aggregation collects each container's logs and moves these logs onto the directory configured in yarn.nodemanager.remote-app-log-dir
only after the completion of the application. Refer the description of yarn.log-aggregation-enable
property here.
So, the applicationId
listed by the command isn't completed yet and the logs are not yet collected. Thus the response when trying to access the logs of a running application
hdfs://<ip address>/var/log/hadoop-yarn/path/to/application/ does not have any log files
You can try the same command yarn logs -applicationId <application ID>
to view the logs once the application has completed.
To list all the FINISHED applications, use
yarn application -list -appStates FINISHED
Or to list all the applications
yarn application -list -appStates ALL