Ask a Question

What are the actions that happen when a DataNode fails?

in Technology by
What are the actions that happen when a DataNode fails?

1 Answer

0 votes
by
  • Both the Jobtracker and the name node detect the failure on which blocks were the DataNode failed.
  • On the failed node all the tasks are rescheduled by locating other DataNodes with copies of these blocks
  • User’s data will be replicated to another node from namenode to maintain the configured replication factor.

Related questions

0 votes
Q: What is happen when drive failure occurs?
    What is happen when drive failure occurs?...
asked Jul 31, 2021 in Technology by JackTerrance
0 votes
Q: What Will Happen When Power Factor Is Leading In Distribution Of Power?
    What Will Happen When Power Factor Is Leading In Distribution Of Power?...
asked Dec 12, 2020 in Technology by JackTerrance
0 votes
Q: Commiting a code change, when the inspection fails , is perfectly fine as the code logic is working fine anyway
    Commiting a code change, when the inspection fails , is perfectly fine as the code logic is working fine anyway (i)False (ii)True...
asked Oct 5, 2020 in Technology by Editorial Staff
0 votes
Q: python script fails running as a daemon (EOFError: EOF when reading a line)
    I've created a python3 script that runs fine on command line but when I try to run as a daemon ... JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Apr 21, 2022 in Education by JackTerrance
0 votes
Q: What will happen to a var type when code block ends?
    What is the diference between those two examples of code? public Test(int x) { List list= new ... JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Mar 4, 2022 in Education by JackTerrance
0 votes
Q: Cronjob emailing "command failed with exit status 1" when nothing fails
    I've been experimenting with cronjobs recently and have it setup like so: crontab: SHELL=/bin/sh MAILTO= ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Feb 28, 2022 in Education by JackTerrance
0 votes
Q: Hibernate 4.0: javax.persistence.criteria.Path.get fails for when field of a composite key is specified
    Calling javax.persistence.criteria.Path.get(String name) fails for the simple class hierarchy detailed below. The ... for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Jan 15, 2022 in Education by JackTerrance
0 votes
Q: What will happen when the data of the jQuery.cache is read from an element?
    What will happen when the data of the jQuery.cache is read from an element? (a) Unique number is ... JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Oct 23, 2021 in Education by JackTerrance
0 votes
Q: When does a memory leak happen?
    When does a memory leak happen? (a) Browser doesn't release memory from objects unnecessary (b) Browser ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Oct 22, 2021 in Education by JackTerrance
0 votes
Q: E and F are two independent events. The probability that both e and F happen is 1/12 and the probability that neither E nor F happens is 1/2. Then
    E and F are two independent events. The probability that both e and F happen is 1/12 and the probability that neither E ... P(F)=1//3` Select the correct answer from above options...
asked Nov 13, 2021 in Education by JackTerrance
0 votes
Q: When using Selenium's click_and_hold method exactly what conditions or actions cause the mouse click to release?
    I've had several occasions in my selenium tests where I decided to use Selenium's click_and_hold() (source ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Apr 26, 2022 in Education by JackTerrance
0 votes
Q: A computers virus is [a] a chemical that attacks silicon. [b] data that the computer fails to handle. [c] special kind of computer programme. [d] a micro-organism that destroys integrated circuits.
    A computers virus is [a] a chemical that attacks silicon. [b] data that the computer fails to handle. ... destroys integrated circuits. Select the correct answer from above options...
asked Nov 27, 2021 in Education by JackTerrance
0 votes
Q: One of the two events must happen. Given that the chance of one is two-third of the other, find the odds in favour of the other.
    One of the two events must happen. Given that the chance of one is two-third of the other, find the odds in favour of the other. Select the correct answer from above options...
asked Nov 22, 2021 in Education by JackTerrance
0 votes
Q: If the probabilities for A to fail in an examination is 0.2 and that for B is 0.3, then the probability that either A or B fails is
    If the probabilities for A to fail in an examination is 0.2 and that for B is 0.3, then the probability that either A ... C. ≤ .5 D. 0 Select the correct answer from above options...
asked Nov 20, 2021 in Education by JackTerrance
0 votes
Q: If 3/10 is the probability that an event will happen, what is the probability that it will not happen
    If 3/10 is the probability that an event will happen, what is the probability that it will not happen Select the correct answer from above options...
asked Nov 15, 2021 in Education by JackTerrance

© Copyright 2018-2023 www.Blogmepost.com. All rights reserved. Developed by Blogmepost.

...