What happens when a datanode fails ?

839

---

In Hadoop, which file controls reporting in Hadoop?

825

---

how can you debug Hadoop code?

891

---

For a job in Hadoop, is it possible to change the number of mappers to be created?

832

---

What are the primary phases of a Reducer?

878

---

how indexing in HDFS is done?

896

---

What is the role of a MapReduce partitioner?

860

---

Is it important for Hadoop MapReduce jobs to be written in Java?

897

---

what job does the conf class do?

844

---

What is the key- value pair in Hadoop MapReduce?

731

---

What is InputFormat in Hadoop MapReduce?

723

---

What are the various InputFormats in Hadoop?

694

---

Explain InputSplit in Hadoop MapReduce?

727

---

How much space will the split occupy in Mapreduce?

724

---

What is a RecordReader in Hadoop MapReduce?

722

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