经过近一个月时间。最终几乎相同将之前在Flume 0.9.4上面编写的source、sink等插件迁移到Flume-ng 1.5.0，包含了将Flume 0.9.4上面的TailSource、TailDirSource等插件的迁移（当然，我们增加了很多新的功能，比方故障恢复、日志的断点续传、按块发送日志以及每一个一定的时间轮询发送日志而不是等一个日志发送完才发送另外一个日志）。
如今我们须要将Flume-ng 1.5.0和最新的Kafka-0.8.1.1进行整合。今天这篇文章主要是说怎样编译Kafka-0.8.1.1源代码。
在讲述怎样编译Kafka-0.8.1.1源代码之前，我们先来了解一下什么是Kafka：
Kafka is a distributed, partitioned, replicated commit log service. It provides the functionality of a messaging system, but with a unique design.(Kafka是一个分布式的、可分区的(partitioned)、基于备份的(replicated)和commit-log存储的服务.。它提供了相似于messaging system的特性,可是在设计实现上全然不同)。
kafka是一种高吞吐量的分布式公布订阅消息系统，它有例如以下特性：
（1）、通过O(1)的磁盘数据结构提供消息的持久化。这样的结构对于即使数以TB的消息存储也能够保持长时间的稳定性能。
（2）、高吞吐量：即使是非常普通的硬件kafka也能够支持每秒数十万的消息。
（3）、支持通过kafkaserver和消费机集群来分区消息。
（4）、支持Hadoop并行数据载入。
官方文档中关于kafka分布式订阅架构例如以下图：
欢迎关注微信公共帐号
好了。很多其它关于Kafka的介绍能够去http://kafka.apache.org/里面查看。如今我们正入正题。说说怎样编译 Kafka-0.8.1.1，我们能够用Kafka里面自带的脚本进行编译；我们也能够用sbt进行编译。sbt编译有点麻烦，我将在文章的后面进行介绍。
一、用Kafka里面自带的脚本进行编译
下载好了Kafka源代码，里面自带了一个gradlew的脚本。我们能够利用这个编译Kafka源代码：
2 | # tar -zxf kafka-0.8.1.1-src.tgz |
4 | # ./gradlew releaseTarGz |
执行上面的命令进行编译将会出现下面的异常信息：
01 | :core:signArchives FAILED |
03 | FAILURE: Build failed with an exception. |
06 | Execution failed for task ':core:signArchives'. |
07 | > Cannot perform signing task ':core:signArchives' because it |
08 | has no configured signatory |
11 | Run with --stacktrace option to get the stack trace. Run with |
12 | --info or --debug option to get more log output. |
这是一个bug（https://issues.apache.org/jira/browse/KAFKA-1297）。能够用下面的命令进行编译
1 | ./gradlew releaseTarGzAll -x signArchives |
这时候将会编译成功（在编译的过程中将会出现非常多的）。
在编译的过程中，我们也能够指定相应的Scala版本号进行编译：
1 | ./gradlew -PscalaVersion=2.10.3 releaseTarGz -x signArchives |
编译完之后将会在core/build/distributions/里面生成kafka_2.10-0.8.1.1.tgz文件。这个和从网上下载的一样。能够直接用。
二、利用sbt进行编译
我们相同能够用sbt来编译Kafka，过程例如以下：
03 | # git checkout -b 0.8 remotes/origin/0.8 |
05 | [info] [SUCCESSFUL ] org.eclipse.jdt#core;3.1.1!core.jar (2243ms) |
06 | [info] downloading http: |
07 | [info] [SUCCESSFUL ] ant#ant;1.6.5!ant.jar (1150ms) |
09 | [info] Resolving org.apache.hadoop#hadoop-core;0.20.2 ... |
11 | [info] Resolving com.yammer.metrics#metrics-annotation;2.2.0 ... |
13 | [info] Resolving com.yammer.metrics#metrics-annotation;2.2.0 ... |
15 | [success] Total time: 168 s, completed Jun 18, 2014 6:51:38 PM |
18 | [info] Set current project to Kafka (in build file:/export1/spark/kafka/) |
19 | Getting Scala 2.8.0 ... |
20 | :: retrieving :: org.scala-sbt#boot-scala |
22 | 3 artifacts copied, 0 already retrieved (14544kB/27ms) |
23 | [success] Total time: 1 s, completed Jun 18, 2014 6:52:37 PM |
对于Kafka 0.8及以上版本号还须要执行下面的命令：
01 | # ./sbt assembly-package-dependency |
02 | [info] Loading project definition from /export1/spark/kafka/project |
03 | [warn] Multiple resolvers having different access mechanism configured with |
04 | same name 'sbt-plugin-releases'. To avoid conflict, Remove duplicate project |
05 | resolvers (`resolvers`) or rename publishing resolver (`publishTo`). |
06 | [info] Set current project to Kafka (in build file:/export1/spark/kafka/) |
07 | [warn] Credentials file /home/wyp/.m2/.credentials does not exist |
08 | [info] Including slf4j-api-1.7.2.jar |
09 | [info] Including metrics-annotation-2.2.0.jar |
10 | [info] Including scala-compiler.jar |
11 | [info] Including scala-library.jar |
12 | [info] Including slf4j-simple-1.6.4.jar |
13 | [info] Including metrics-core-2.2.0.jar |
14 | [info] Including snappy-java-1.0.4.1.jar |
15 | [info] Including zookeeper-3.3.4.jar |
16 | [info] Including log4j-1.2.15.jar |
17 | [info] Including zkclient-0.3.jar |
18 | [info] Including jopt-simple-3.2.jar |
19 | [warn] Merging 'META-INF/NOTICE' with strategy 'rename' |
20 | [warn] Merging 'org/xerial/snappy/native/README' with strategy 'rename' |
21 | [warn] Merging 'META-INF/maven/org.xerial.snappy/snappy-java/LICENSE' |
23 | [warn] Merging 'LICENSE.txt' with strategy 'rename' |
24 | [warn] Merging 'META-INF/LICENSE' with strategy 'rename' |
25 | [warn] Merging 'META-INF/MANIFEST.MF' with strategy 'discard' |
26 | [warn] Strategy 'discard' was applied to a file |
27 | [warn] Strategy 'rename' was applied to 5 files |
28 | [success] Total time: 3 s, completed Jun 18, 2014 6:53:41 PM |
当然，我们也能够在sbt里面指定scala的版本号：
07 | 过往记忆博客，专注于hadoop、hive、spark、shark、flume的技术博客，大量的干货 |
08 | 过往记忆博客微信公共帐号：iteblog_hadoop |
12 | sbt "++2.10.3 assembly-package-dependency" |
本文地址：《Apache Kafka-0.8.1.1源代码编译》：http://www.iteblog.com/archives/1044，过往记忆博客，专注于hadoop、hive、spark、shark、flume的技术博客。大量的干货.过往记忆博客微信公共帐号：iteblog_hadoop本博客文章除特别声明，所有都是原创。
尊重原创，转载请注明： 转载自过往记忆（http://www.iteblog.com/）
本文链接地址: 《Apache Kafka-0.8.1.1源代码编译》（http://www.iteblog.com/archives/1044）
E-mail:wyphao.2007@163.com
