统计apachelog各访问状态个数(使用MapReduce)

统计日志文件中各访问状态的个数.

1.将日志数据上传到hdfs

路径 /mapreduce/data/apachelog/in 中

内容如下

::::::: - - [/Feb/::: +] "GET / HTTP/1.1"
::::::: - - [/Feb/::: +] "GET /tomcat.css HTTP/1.1"
::::::: - - [/Feb/::: +] "GET /tomcat.png HTTP/1.1"
::::::: - - [/Feb/::: +] "GET /bg-nav.png HTTP/1.1"
::::::: - - [/Feb/::: +] "GET /asf-logo.png HTTP/1.1"
::::::: - - [/Feb/::: +] "GET /bg-upper.png HTTP/1.1"
::::::: - - [/Feb/::: +] "GET /bg-button.png HTTP/1.1"
::::::: - - [/Feb/::: +] "GET /bg-middle.png HTTP/1.1"
127.0.0.1 - - [/Feb/::: +] "GET / HTTP/1.1"
127.0.0.1 - - [/Feb/::: +] "GET / HTTP/1.1"
::::::: - - [/Feb/::: +] "GET / HTTP/1.1"
::::::: - - [/Feb/::: +] "GET / HTTP/1.1"
127.0.0.1 - - [/Feb/::: +] "GET / HTTP/1.1"
127.0.0.1 - - [/Feb/::: +] "GET / HTTP/1.1"
::::::: - - [/Feb/::: +] "GET / HTTP/1.1"
::::::: - - [/Feb/::: +] "GET / HTTP/1.1"
127.0.0.1 - - [/Feb/::: +] "GET / HTTP/1.1"
127.0.0.1 - - [/Feb/::: +] "GET / HTTP/1.1"
::::::: - - [/Feb/::: +] "GET /sentiment_ms/login HTTP/1.1"
::::::: - - [/Feb/::: +] "GET / HTTP/1.1"
::::::: - - [/Feb/::: +] "GET / HTTP/1.1"  

2.代码

package com.zhen.apachelog;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.GenericOptionsParser;

public class ApacheLog {

public static class apacheMapper extends Mapper<Object, Text, Text, IntWritable>{

@Override
protected void map(Object key, Text value, Mapper<Object, Text, Text, IntWritable>.Context context)
throws IOException, InterruptedException {
String valueStr = value.toString();
String[] strings = valueStr.split("\" ");
String status = strings[].split(" ")[];
context.write(new Text(status), new IntWritable());
}

}

public static class apacheReduce extends Reducer<Text, IntWritable, Text, IntWritable>{

@Override
protected void reduce(Text key, Iterable<IntWritable> value,
Reducer<Text, IntWritable, Text, IntWritable>.Context context) throws IOException, InterruptedException {
int count = ;
for (IntWritable intWritable : value) {
count+=intWritable.get();
}
context.write(key, new IntWritable(count));
}

}

public static void main(String[] args) throws IOException, ClassNotFoundException, InterruptedException {

Configuration conf = new Configuration();
String[] otherArgs = new GenericOptionsParser(conf,args).getRemainingArgs(); 

Job job = new Job(conf,"ApacheLog");
job.setJarByClass(ApacheLog.class);

job.setMapperClass(apacheMapper.class);
job.setReducerClass(apacheReduce.class);

job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);

FileInputFormat.addInputPaths(job, args[]);
FileOutputFormat.setOutputPath(job, new Path(args[]));

System.exit(job.waitForCompletion(true)?:);
}

}

3.将代码生成jar包

4.调用

EFdeMacBook-Pro:hadoop-2.8.0 FengZhen$ hadoop jar /Users/FengZhen/Desktop/ApacheLog.jar com.zhen.apachelog.ApacheLog /mapreduce/data/apachelog/in /mapreduce/data/apachelog/out
17/09/13 15:32:22 INFO client.RMProxy: Connecting to ResourceManager at localhost/127.0.0.1:8032
17/09/13 15:32:23 INFO input.FileInputFormat: Total input files to process : 1
17/09/13 15:32:23 INFO mapreduce.JobSubmitter: number of splits:1
17/09/13 15:32:23 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1505268150495_0017
17/09/13 15:32:23 INFO impl.YarnClientImpl: Submitted application application_1505268150495_0017
17/09/13 15:32:23 INFO mapreduce.Job: The url to track the job: http://192.168.1.64:8088/proxy/application_1505268150495_0017/
17/09/13 15:32:23 INFO mapreduce.Job: Running job: job_1505268150495_0017
17/09/13 15:32:32 INFO mapreduce.Job: Job job_1505268150495_0017 running in uber mode : false
17/09/13 15:32:32 INFO mapreduce.Job: map 0% reduce 0%
17/09/13 15:32:37 INFO mapreduce.Job: map 100% reduce 0%
17/09/13 15:32:43 INFO mapreduce.Job: map 100% reduce 100%
17/09/13 15:32:43 INFO mapreduce.Job: Job job_1505268150495_0017 completed successfully
17/09/13 15:32:43 INFO mapreduce.Job: Counters: 49
File System Counters
FILE: Number of bytes read=216
FILE: Number of bytes written=272795
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=1776
HDFS: Number of bytes written=13
HDFS: Number of read operations=6
HDFS: Number of large read operations=0
HDFS: Number of write operations=2
Job Counters
Launched map tasks=1
Launched reduce tasks=1
Data-local map tasks=1
Total time spent by all maps in occupied slots (ms)=3160
Total time spent by all reduces in occupied slots (ms)=3167
Total time spent by all map tasks (ms)=3160
Total time spent by all reduce tasks (ms)=3167
Total vcore-milliseconds taken by all map tasks=3160
Total vcore-milliseconds taken by all reduce tasks=3167
Total megabyte-milliseconds taken by all map tasks=3235840
Total megabyte-milliseconds taken by all reduce tasks=3243008
Map-Reduce Framework
Map input records=21
Map output records=21
Map output bytes=168
Map output materialized bytes=216
Input split bytes=150
Combine input records=0
Combine output records=0
Reduce input groups=2
Reduce shuffle bytes=216
Reduce input records=21
Reduce output records=2
Spilled Records=42
Shuffled Maps =1
Failed Shuffles=0
Merged Map outputs=1
GC time elapsed (ms)=54
CPU time spent (ms)=0
Physical memory (bytes) snapshot=0
Virtual memory (bytes) snapshot=0
Total committed heap usage (bytes)=358612992
Shuffle Errors
BAD_ID=0
CONNECTION=0
IO_ERROR=0
WRONG_LENGTH=0
WRONG_MAP=0
WRONG_REDUCE=0
File Input Format Counters
Bytes Read=1626
File Output Format Counters
Bytes Written=13

5.查看结果

EFdeMacBook-Pro:lib FengZhen$ hadoop fs -ls /mapreduce/data/apachelog/out
Found 2 items
-rw-r--r-- 1 FengZhen supergroup 0 2017-09-13 15:32 /mapreduce/data/apachelog/out/_SUCCESS
-rw-r--r-- 1 FengZhen supergroup 13 2017-09-13 15:32 /mapreduce/data/apachelog/out/part-r-00000
EFdeMacBook-Pro:lib FengZhen$ hadoop fs -text /mapreduce/data/apachelog/out/part-r-00000
200 8
404 13