DAS-C01 · Question #150
A company uses an Amazon EMR cluster with 50 nodes to process operational data and make the data available for data analysts. These jobs run nightly use Apache Hive with the Apache Jez framework as a
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Question
A company uses an Amazon EMR cluster with 50 nodes to process operational data and make the data available for data analysts. These jobs run nightly use Apache Hive with the Apache Jez framework as a processing model and write results to Hadoop Distributed File System (HDFS) In the last few weeks, jobs are failing and are producing the following error message "File could only be replicated to 0 nodes instead of 1". A data analytics specialist checks the DataNode logs the NameNode logs and network connectivity for potential issues that could have prevented HDFS from replicating data. The data analytics specialist rules out these factors as causes for the issue. Which solution will prevent the jobs from failing'?
Options
- AMonitor the HDFSUtilization metric. If the value crosses a user-defined threshold add task nodes
- BMonitor the HDFSUtilization metric If the value crosses a user-defined threshold add core nodes
- CMonitor the MemoryAllocatedMB metric. If the value crosses a user-defined threshold, add task
- DMonitor the MemoryAllocatedMB metric. If the value crosses a user-defined threshold, add core
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