Apache Hadoop Release
I downloaded Hadoop 2.6.4, but I find 2.7.2 was released earlier than 2.6.4, also 2.7.2 is stable. How can 2.7.2 is more stable than 2.6.4, and how can 2.7.2 released earlier than 2.6.4 ?
I guess 2.7.X are stable versions, 2.6.X are unstable versions ?
Hadoop community had decided to drop JDK6 runtime and works with JDK 7+ only.
On 2.x release versions they started this trough release 2.7.0.
To extend support for JDK6 hadoop users they started maintenance release for 2.6.x branch.
Summary
2.7.x versions contains roadmap features with JDK7 support.
2.6.x version contains point releases having critical fixes with JDK6 support.
To answer the question 2.6.x release post 2.7.x are point releases for 2.6.x branch containing critical fixes.
As long as stability is concerned, release 2.7.1 and 2.7.2 are stable.
Sources
http://hadoop.apache.org/releases.html
Check POM configuration of Hadoop's 2.7.x & 2.6.x branches on github mirrors for JDK compatibility
Related
I need to upgrade openpgp from version 4.x to version 5.x and I noticed there are major changes in version 5.x
The reason I need to upgrade is that version 4.x have dependency that causing problem and this dependency do not exit in version 5.x
First problem I get when upgrading to version 5.x is that initworker function does not exist.
is there a documentation to help upgrading to version 5.x ?
I was expecting version 5 to be backward compatible with minor changes
What version of Apache Storm should I have installed in order to use the latest version of StormCrawler?
Apache Storm 1.2.3 or 2.0.0
Thanks
As of writing, the master branch of StormCrawler is based on Storm 1.2.3 as shown in the pom.xml, but there is a 2.x branch available as well.
I am trying to use maven in our project and am new to it.
checking this https://maven.apache.org/download.cgi
3.6.0 version is latest version to download.
Someone was saying there is maven 4 is latest. Not sure where to download this from and can we use this for java 8.
Which one is latest version to use?
From https://maven.apache.org/download.cgi
Apache Maven 3.6.0 is the latest release and recommended version for
all users.
Works nicely with Java 8. Note that your IDE may bundle an older version in the unlikely case you run into problems.
I recently came across Hadoop version, in this I noticed that, both 2.6.5 and 2.7.3 are been developed parallel and simultaneous.If possible someone please give me difference between them.
08 October, 2016: Release 2.6.5 available
A point release for the 2.6 line.
Please see the Hadoop 2.6.5 Release Notes for the list of 79 critical bug fixes and since the previous release 2.6.4.
25 August, 2016: Release 2.7.3 available
A point release for the 2.7 line.
Please see the Hadoop 2.7.3 Release Notes for the list of 221 bug fixes and patches since the previous release 2.7.2.
http://hadoop.apache.org/releases.html explains the difference between the 2.6 and 2.7 releases:
21 April 2015: Release 2.7.0 available
Apache Hadoop 2.7.0 contains a number of significant enhancements. A few of them are noted below.
IMPORTANT notes
This release drops support for JDK6 runtime and works with JDK 7+ only.
So the difference is that 2.7 was introduced for JDK 7+, but 2.6 continues having releases to support JDK6 users.
From that same link you can see that 2.7 is having more bug fixes made per point release than the 2.6 tree.
I am using Cloudera Manager with CDH4.2.2 for my 3+1 cluster. On starting the installation with cloudera manager, it automatically downloads and installs JDK1.6. I want to use JDK1.7 with CDH for my convinience. Is it possible or is there any version of CDH which while installating Hadoop in the cluster automatically downloads and installs and successfully runs Hadoop with JDK1.7?
If yes, may I know which version of CDH is it and where do i get to download it from?
I want to work with JDK1.7 instead of 1.6 because i want to install Apache Giraph on CDH but it seems Giraph does not fit fine with JDK1.6 and needs the JDK1.7.
With Regards,
JDK 1.7 is supported for all CDH applications as of CDH 4.4 and Cloudera Manager 4.7.
That being said, no version of Cloudera Manager 4.x installs JDK 1.7 during the installation (latest version is 4.8.2). The only version of Cloudera Manager that installs JDK 1.7 automatically is 5.0.0.
To summarize: If you want an automated installation of JDK 1.7 via Cloudera Manager, you need to upgrade to CDH 5, and CM 5.0.0. Alternatively, you could upgrade to CDH4.4, and then perform a manual installation of JDK 1.7.