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Apache Hadoop 2.0

Summary

Bring Apache Hadoop, the hottest open source big data platform, to Fedora, the hottest open source distribution. Fedora should be the best distribution for using Apache Hadoop.

Owner

People involved

Name IRC Focus Additional
Matthew Farrellee mattf keeping track, integration testing UTC-5
Peter MacKinnon pmackinn packaging UTC-5
Rob Rati rsquared packaging UTC-5
Timothy St. Clair tstclair setup and configuration UTC-6
Sam Kottler skottler packaging UTC-5
Gil Cattaneo gil packaging UTC+1

Current status

  • Targeted release: Fedora 20
  • Last updated: 3 Apr 2013
  • Percentage of completion: 5%


Detailed Description

Apache Hadoop is a widely used, increasingly complete big data platform, with a strong open source community and growing ecosystem. The goal is to package and integrate the core of the Hadoop ecosystem for Fedora, allowing for immediate use and creating a base for the rest of the ecosystem.


Benefit to Fedora

The Apache Hadoop software will be packaged and integrated with Fedora. The core of the Hadoop ecosystem will be available with Fedora and provide a base for additional packages.


Scope

  • Package the Apache Hadoop 2.0.2 software
  • Package all dependencies needed for Apache Hadoop 2.0.2
  • Skip package dependencies required for unit testing, record them in a dependency backlog for later cleanup

Approach

We are taking an iterative, depth-first approach to packaging. We do not have all the dependencies mapped out ahead of time. Dependencies are being tabulated into two groups:

  1. missing - the dependency being requested from a hadoop-common pom has not yet been packaged, reviewed or generated into fedora repos
  2. broken - the dependency requested is out of date with current fedora versions, and patches must be developed for inclusion in a hadoop rpm build that address any build, API or source code deltas

Note that a dependency may show up in both of these tables.

Anyone who wants to help should find an available dependency below, edit the table changing the state to Active and packager to yourself.

While packaging a dependency, test dependencies can be skipped. Testing will be done via integration testing periodically during packaging and then after packaging completes. Test dependencies that are skipped must be added to the Skipped dependencies table below.

If you are lucky enough to pick a dependency that itself has unpackaged dependencies, identify the sub-dependencies and add them to the bottom of the Dependencies table below, change your current dependency to Blocked and repeat.

If your dependency is already packaged but the version is incompatible, contact the package owner and resolve the incompatibility in a mutually satisfactory way. For instance:

  • If the version available in Fedora is older, explore updating the package. If that is not possible, explore creating a package that includes a version in its name, e.g. pkgnameXY. Ultimately, the most recent version in Fedora should have the name pkgname while older versions have pkgnameXY. It may take a full Fedora release to rationalize package names. Make a note in the Dependencies table.
  • If the version you need is older than the packaged version, consider creating a patch to use the newer version. If a patch is not viable, proceed by packaging the dependency with a version in its name, e.g. pkgnameXY. Make a note in the Dependencies table.
Missing dependency legend
State Notes
Available free for someone to take
Active dependency is actively being packaged if missing, or patch is being developed or tested for inclusion in hadoop-common build
Blocked pending packages for dependencies
Review under review, include link to review BZ
Complete woohoo!
Missing Dependencies
Project State Review BZ Packager Notes
hadoop Active rrati,pmackinn
bookkeeper Review RHBZ #948589 gil Version 4.0 requested. packaged 4.2.1. Patch: BOOKKEEPER-598
glassfish-gmbal Complete RHBZ #859112 gil
glassfish-management-api Complete RHBZ #859110 gil
grizzly Review RHBZ #859114 gil
groovy Review RHBZ #858127 gil 1.5 requested but 1.8 packaged in fedora. Possible moving forward 1.8 series will be known as groovy18 and groovy will be 2.x.
hsqldb Available 1.8 in fedora, 2.0 requested. 2.2.8 packaged by gil, but seemingly no review request. Needs followup.
jersey Complete RHBZ #825347 gil Should be rebuilt with grizzly2 support enabled.
jets3t Review RHBZ #847109 gil
jspc-compiler Active pmackinn jspc specfile developed. Adaptations made for incumbent Tomcat 7 within spec. RPMs packaged in local custom repo. Reviewing fit as part of overall hadoop-common compilation/testing.
kfs Available gil has packaged 0.5, but no review request. kfs has become Quantcast qfs. If not strictly necessary, you could also remove
maven-native Review RHBZ #864084 gil Needs patch to build with java7. NOTE: javac target/source is already set by mojo.java.target option
zookeeper Review RHBZ #823122 gil
Broken Dependencies
Project Packager Notes
ant Version 1.6 requested, 1.8 currently packaged in Fedora. Needs to be inspected for API/functional incompatibilities(?)
apache-commons-collections pmackinn Java import compilation error with existing package. Patches for hadoop-common being tracked at https://github.com/pdmack/hadoop-common/tree/fed-master-collections
apache-commons-math pmackinn Current apache-commons-math uses math3 in pom instead of math, and API changes in code. Patches for hadoop-common being tracked at https://github.com/pdmack/hadoop-common/tree/fed-master-math
gmaven gil Version 1.0 requested, available 1.4 (but has broken deps) RHBZ #914056
hadoop-hdfs pmackinn glibc link error in hdfs native build. Patch for hadoop-common being tracked at https://github.com/pdmack/hadoop-common/tree/fed-master-cmake
jersey pmackinn Needs jersey-servlet and version. Trachked at https://github.com/pdmack/hadoop-common/tree/fed-master-jersey
jets3t pmackinn Requires 0.6.1. With 0.9.x: hadoop-common Jets3tNativeFileSystemStore.java error: incompatible types S3ObjectsChunk chunk = s3Service.listObjectsChunked(bucket.getName(). Patches for hadoop-common being tracked at https://github.com/pdmack/hadoop-common/tree/fed-master-jets3t
jetty rrati jetty8 packaged in Fedora, but 6.x requested. 6 and 8 are incompatible. Patches tracked at https://github.com/pdmack/hadoop-common/tree/fed-master-jetty
slf4j pmackinn Package in fedora fails to match in dependency resolution. jcl104-over-slf4j dep in hadoop-common moved to jcl-over-slf4j as part of jspc/tomcat dep. Patch being tracked at https://github.com/pdmack/hadoop-common/tree/fed-master-jasper
tomcat-jasper pmackinn Version 5.5.x requested. Adaptations made for incumbent Tomcat 7 via patches at https://github.com/pdmack/hadoop-common/tree/fed-master-jasper. Reviewing fit as part of overall hadoop-common compilation/testing.
JAR Project State Packager Notes
[jar name] [package name] Available noone Needed for tests by #N

Packager tips

  • mvn-rpmbuild utility will ONLY resolve from system repo
  • mvn-local will resolve from system repo first then fallback to maven if unresolved
  • can be used to find the delta between system repo packages available and missing dependencies that can be viewed in the .m2 local maven repo (find *.jar)
  • -Dmaven.local.debug=true
    • reveals how JPP lookups are executing per dependency -> useful for finding gId,aId mismatches
  • -Dmaven.test.skip=true
    • tells maven to skip test compilation

TODO: Template spec files to work from

TODO: Setup staging repository for sharing packages under review

An alternative to gmaven:

  • apply a patch with the following content where required
  • test support is not guaranteed, should not work.

     <plugin>
       <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-antrun-plugin</artifactId>
       <version>1.7</version>
       <dependencies>
         <dependency>
           <groupId>org.codehaus.groovy</groupId>
           <artifactId>groovy</artifactId>
           <version>any</version>
         </dependency>
         <dependency>
           <groupId>antlr</groupId>
           <artifactId>antlr</artifactId>
           <version>any</version>
         </dependency>
         <dependency>
           <groupId>commons-cli</groupId>
           <artifactId>commons-cli</artifactId>
           <version>any</version>
         </dependency>
         <dependency>
           <groupId>asm</groupId>
           <artifactId>asm-all</artifactId>
           <version>any</version>
         </dependency>
         <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-nop</artifactId>
           <version>any</version>
         </dependency>
       </dependencies>
       <executions>
         <execution>
           <id>compile</id>
           <phase>process-sources</phase>
           <configuration>
             <target>
               <mkdir dir="${basedir}/target/classes"/>
               <taskdef name="groovyc" classname="org.codehaus.groovy.ant.Groovyc">
                 <classpath refid="maven.plugin.classpath"/>
               </taskdef>
               <groovyc destdir="${project.build.outputDirectory}" srcdir="${basedir}/src/main" classpathref="maven.compile.classpath">
                 <javac source="1.5" target="1.5" debug="on"/>
               </groovyc>
             </target>
           </configuration>
           <goals>
             <goal>run</goal>
           </goals>
         </execution>
       </executions>
     </plugin>

How To Test

  1. TODO: NEEDS MORE DEFINITION
  2. yum install X Y Z across one or more nodes
  3. Setup a simple cluster by following TBD
  4. Run http://hadoop.apache.org/docs/stable/gridmix.html


User Experience

For users who are interested in running Apache Hadoop on Fedora, they will find it available from Fedora Project yum repositories.

TODO: SPECIFICALLY PACKAGES X Y Z


Dependencies

No other packages currently depend on Apache Hadoop.

Completion of this feature will involve packaging numerous dependencies, see the Dependencies table. Some of the dependencies are already being packaged by others in the Fedora community. Where dependency overlap is found, a negotaition must occur to ensure a satisfactory version and package is available to all parties.

TODO: Is https://fedoraproject.org/wiki/Hypertable ?


Contingency Plan

With no packages depending on Apache Hadoop, none is necessary. The biggest risk is not completing packages for all dependencies. In that case, the feature can be removed from the release notes. The packaged dependencies should remain in the distribution. The feature can be pushed to the next Fedora release.


Documentation


Release Notes

  • TODO


Comments and Discussion

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