How do I see the actual Map Reduce job in Hadoop from beyond all abstractions?

Question

I have a Hadoop Cluster. On top of that is HBase. On top of that is Phoenix. When I execute SELECT * FROM TEST LIMIT 1000; from Phoenix... how do I actually see what job was sent to hadoop?

Answer 1

Phoenix使用Hbase coporcessors进行并行扫描而不使用map reduce作业。您可以通过

查看查询计划的详细信息

  

解释SELECT * FROM TEST LIMIT 1000;

如果您需要更多详细信息，请将日志从phoenix路由到hbase服务器上的其他日志类别。