Eclipse Import into Hadoop 2.4

Install the Elicpse plug-in hadoop-maven-plugins using the following command:
$ CD ${hadoop_home}/hadoop-maven-plugins
$ mvn Install
Then generate the Eclipse project file:
$ cd ${hadoop_home}
$ MVN eclipse:eclipse-dskiptests
Finally, in Eclipse, follow the following process to import the source code: "File" → "Import" → "Existing Projects into Workspace".

Here you can refer to: http://www.aboutyun.com/thread-8211-1-1.html

Here is a blog written by the error, where I only met a few, I finally posted the error I encountered

Error#1. Hadoop-streaming inside the build path has a problem, showing/root/workspace/hadoop-2.2.0-src/hadoop-yarn-project/hadoop-yarn/ hadoop-yarn-server/hadoop-yarn-server-resourcemanager/conf (missing)

Solution, remove the reference just fine.

Error#2. hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/ Testdfsclientfailover.java Sun.net.spi.nameservice.NameService Error, this is a package that needs import, exists in OpenJDK, not found in Oracle JDK, Need to download one. Nameservice is an interface, it is good to find a nameservice on the internet to put in the package. http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/7u40-b43/sun/net/spi/nameservice/ Nameservice.java#nameservice

Error#3. /hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineeditsviewer/xmleditsvisitor.java inside Display
Import Com.sun.org.apache.xml.internal.serialize.OutputFormat;
Import Com.sun.org.apache.xml.internal.serialize.XMLSerializer;
Failure, this is due to eclipse's strong check principle, open Java-Compiler-errors/warnings and under "Deprecated and restricted API" change the Sett ing of "Forbidden reference (Access rules)" Adjusts the error level to the warning level.

Error#4. /hadoop-common/src/test/java/org/apache/hadoop/io/serializer/avro/  Testavroserialization.java shows that there is no Avrorecord class, and the online search for Avrorecord class is put into a sibling package. http://grepcode.com/file/repo1.maven.org/maven2/org.apache.hadoop/hadoop-common/2.2.0/org/apache/hadoop/io/ Serializer/avro/avrorecord.java#avrorecord

Error#5. The ORG.APACHE.HADOOP.IPC.PROTOBUF package is empty and needs to be found in the/hadoop-common/target/generated-sources/java profobuf copy to/hadoop-common It's good to be in the/src/test/java. At the same time the package is also missing the following three references, find on the Grepcode, the corresponding files hadoop-common2.2.0 down to import.

Org.apache.hadoop.ipc.protobuf.TestProtos.EchoRequestProto;
Org.apache.hadoop.ipc.protobuf.TestProtos.EchoResponseProto;
Org.apache.hadoop.ipc.protobuf.TestRpcServiceProtos.TestProtobufRpcProto;

Error#6. /hadoop-auth/org/apache/hadoop/security/authentication/client/authenricatortestcase.java Display Server.start () and Server.stop () error, have not found the reason, waiting to be checked ~ ~ ~

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I encountered the error 56, in fact, the main 3 questions

1. Ibid. error#1. Hadoop-streaming inside the build path has a problem, showing/root/workspace/hadoop-2.2.0-src/hadoop-yarn-project/hadoop-yarn/ hadoop-yarn-server/hadoop-yarn-server-resourcemanager/conf (missing)

   Solution, remove the reference is good, the right right-click Error item->properties-> left Java Build path->source-> selected error item, remove

2. Ibid. error#4, the solution is ibid.

3. Ibid. error#5, the solution is ibid.

Then you should be right.

Reference:

Http://zhidao.baidu.com/link?url=HC-qIB_ Xxz4zdjtd-gpgi0mmwge7fgpjc222ri9ha-ju3iflcer4ivt7zogvou7jyr4fwew8yup0opwo_9tdlz4u-vd5derkqn8oihzzqfw