Oozie workflow fails with an exception - Could not find Yarn tags property (mapreduce.job.tags)

[#1]

SYMPTOM

Running java action via Oozie workflow fails with below error:

Failing Oozie Launcher, Main class [org.apache.oozie.action.hadoop.JavaMain], main() threw exception, Could not find Yarn tags property (mapreduce.job.tags) 
java.lang.RuntimeException: Could not find Yarn tags property (mapreduce.job.tags) 
at org.apache.oozie.action.hadoop.LauncherMainHadoopUtils.getChildYarnJobs(LauncherMainHadoopUtils.java:52) 
at org.apache.oozie.action.hadoop.LauncherMainHadoopUtils.killChildYarnJobs(LauncherMainHadoopUtils.java:87) 
at org.apache.oozie.action.hadoop.JavaMain.run(JavaMain.java:44) 
at org.apache.oozie.action.hadoop.LauncherMain.run(LauncherMain.java:38) 
at org.apache.oozie.action.hadoop.JavaMain.main(JavaMain.java:36) 

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ROOT CAUSE

Missing or Yarn related jar file conflict in Oozie sharelib.

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RESOLUTION

Complete the following steps as oozie user in the Oozie node:

1. Recreate Oozie sharelib using below command

/usr/hdp/<hdp-version>/oozie/bin/oozie-setup.sh sharelib create -locallib /usr/hdp/<hdp-version>/oozie/oozie-sharelib.tar.gz -fs hdfs://<namenode-host>:8020 

2. Update Oozie sharelib using below command

oozie admin -oozie http://<oozie-host>:11000/oozie -sharelibupdate 

3. Restart oozie service using Ambari and resubmit the workflow.

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Note - If you have put any custom jars in Oozie sharelib, please make sure to copy them back again after re-creating Oozie sharelib.