What happens when a datanode fails ?

499

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In Hadoop, which file controls reporting in Hadoop?

492

---

how can you debug Hadoop code?

520

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

495

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What are the primary phases of a Reducer?

534

---

how indexing in HDFS is done?

501

---

What is the role of a MapReduce partitioner?

512

---

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

489

---

what job does the conf class do?

497

---

What is the key- value pair in Hadoop MapReduce?

405

---

What is InputFormat in Hadoop MapReduce?

365

---

What are the various InputFormats in Hadoop?

375

---

Explain InputSplit in Hadoop MapReduce?

392

---

How much space will the split occupy in Mapreduce?

403

---

What is a RecordReader in Hadoop MapReduce?

399

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