[jira] [Resolved] (HDDS-4289) Throw exception from hadoop2 filesystem jar in HA environment

["Attila Doroszlai (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDDS-4289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Attila Doroszlai resolved HDDS-4289.
------------------------------------
    Fix Version/s: 1.1.0
       Resolution: Workaround

> Throw exception from hadoop2 filesystem jar in HA environment
> -------------------------------------------------------------
>
>                 Key: HDDS-4289
>                 URL: https://issues.apache.org/jira/browse/HDDS-4289
>             Project: Apache Ozone
>          Issue Type: Bug
>          Components: OM HA
>            Reporter: Marton Elek
>            Assignee: Janus Chow
>            Priority: Major
>              Labels: newbie, pull-request-available
>             Fix For: 1.1.0
>
>
> Thanks for Tamas Pleszkan for reporting this problem.
> ozone-filesystem-hadoop2 doesn't support OM-HA (today) as the used Hadoop3OmTransport uses FailoverProxyProvider which is not available in hadoop2.
> Long-term we need a custom failover mechanism, but this jira suggests to improve the error handling. `Hadoop27OmTransportFactory` should throw an exception if HA is used.
> Used command:
> {code}
> spark-submit --master yarn --deploy-mode client --executor-memory 1g --conf "spark.yarn.access.hadoopFileSystems=o3fs://bucket.hdfs.ozone1/" --jars "/opt/cloudera/parcels/CDH-7.1.3-1.cdh7.1.3.p0.4992530/jars/hadoop-ozone-filesystem-hadoop2-0.5.0.7.1.3.0-100.jar" SparkWordCount.py o3fs://bucket.hdfs.ozone1/words 2
> {code}
> Current exception:
> {code}
> Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ozone.om.exceptions.OMNotLeaderException): OM:om2 is not the leader. Suggested leader is OM:om1.
> {code}
> Expected exception: Unsupported operation exception with meaningful hint to use hadoop3 filesystem jar.



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