编程问答
Oozie gt; Java action gt; why property oozie.launcher.mapred.child.java.opts does not work(乌兹 gt;Java 动作 gt;为什么属性 oozie.launcher.mapred.child.java.opts 不起作用)
Getting Filename/FileData as key/value input for Map when running a Hadoop MapReduce Job(在运行 Hadoop MapReduce 作业时获取文件名/文件数据作为 Map 的键/值输入)
Hadoop: java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected(Hadoop:java.lang.IncompatibleClassChangeError:找到接口 org.apache.hadoop.mapreduce.JobContext，但需要类) - IT屋-
Type mismatch in key from map: expected org.apache.hadoop.io.Text, recieved org.apache.hadoop.io.LongWritable(映射中键的类型不匹配:预期 org.apache.hadoop.io.Text，收到 org.apache.hadoop.io.LongWritable)
Full utilization of all cores in Hadoop pseudo-distributed mode(在 Hadoop 伪分布式模式下充分利用所有内核)
Spark java.lang.StackOverflowError(火花 java.lang.StackOverflowError)
hadoop mapreduce: java.lang.UnsatisfiedLinkError: org.apache.hadoop.util.NativeCodeLoader.buildSupportsSnappy()Z(hadoop mapreduce:java.lang.UnsatisfiedLinkError:org.apache.hadoop.util.NativeCodeLoader.buildSupportsSnappy()Z) - IT屋-程序员软
Could not find or load main class when trying to format namenode; hadoop installation on MAC OS X 10.9.2(尝试格式化 namenode 时找不到或加载主类；在 MAC OS X 10.9.2 上安装 hadoop)
Java 8 grouping by from one-to-many(Java 8 从一对多分组)
Why declaring Mapper and Reducer classes as static?(为什么将 Mapper 和 Reducer 类声明为静态的?)
MapReduceBase and Mapper deprecated(不推荐使用 MapReduceBase 和 Mapper)
Simple Java Map/Reduce framework(简单的 Java Map/Reduce 框架)
