Home > Others

Datanode cannot be started because namenode is formatted.

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞
A common problem: formatting namenode causes the inability to start datanode. Problem description:Datanode cannot be started to view logs. This statement appears when datanote fails to be started n times. Info org. Apache. hadoop. IPC. RPC: server at localhost/127.0.0.1: 9000 not available yet, Zzzzz... Solution:1. First clear all the files in the tmp directory. Because each namenode format creates a new namenodeid, while tmp/dfs/data contains the ID of the last format, namenode format clears the data of namenode, however, the data in datanode is not cleared, resulting in inconsistent namespaceids at startup. run bin/hadoop namenode-format3. run bin/start-all.sh Note: tmp directory is written in hadoop/CONF/core-site.xml

Datanode cannot be started because namenode is formatted.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More