MRAppMaster Errors Running MapReduce Jobs

I have a post looking at potential causes when PolyBase MapReduce jobs are unable to find the MRAppMaster class:

Let me tell you about one of my least favorite things I like to see in PolyBase:

Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster

This error is not limited to PolyBase but is instead an issue when trying to run MapReduce jobs in Hadoop. There are several potential causes, so let’s cover each of them as they relate to PolyBase and hopefully one of these solves your issue.

Click through for four potential solutions to what ails you.

Related Posts

Calculating YARN Utilization Metrics

Dmitry Tolpeko shows how you can calculate per-second cluster utilization measures from YARN’s resource manager logs: But even if you query YARN REST API every second it still can only provide a snapshot of the used YARN resources. It does not show which application allocates or releases containers, their memory and CPU capacity, in which […]

Read More

Spark Streaming DStreams

Manish Mishra explains the fundamental abstraction of Spark Streaming: Before going into details of the operations available on the DStream API, let us look at the input sources from which we can start a Stream. There are multiple ways in which we can get the inputs from e.g. Kafka, Flume, etc. Or simple Idle files. […]

Read More

Categories

March 2019
MTWTFSS
« Feb Apr »
 123
45678910
11121314151617
18192021222324
25262728293031