這篇文章主要介紹了如何解決Hbase、elasticsearch整合中jar包沖突的問題,具有一定借鑒價(jià)值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。

問題背景
再數(shù)據(jù)平臺(tái)中,項(xiàng)目搭建需要使用es和HBASE搭建數(shù)據(jù)查詢接口,整合的過程中出現(xiàn)jar包沖突的bug :com.google.common.base.Stopwatch.()V from class org.apache.hadoop.hbase.zookeeper.MetaTableLocator
org.apache.hadoop.hbase.DoNotRetryIOException: java.lang.IllegalAccessError: tried to access method com.google.common.base.Stopwatch.<init>()V from class org.apache.hadoop.hbase.zookeeper.MetaTableLocator at org.apache.hadoop.hbase.client.RpcRetryingCaller.translateException(RpcRetryingCaller.java:239) at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:150) ... at java.lang.Thread.run(Thread.java:745) Caused by: java.lang.IllegalAccessError: tried to access method com.google.common.base.Stopwatch.<init>()V from class org.apache.hadoop.hbase.zookeeper.MetaTableLocator at org.apache.hadoop.hbase.zookeeper.MetaTableLocator.blockUntil ... at org.apache.hadoop.hbase.client.RegionServerCallable.prepare(RegionServerCallable.java:75) at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:134) ... 45 more
解決辦法
經(jīng)排查,確認(rèn)是因?yàn)?com.google.guava 這個(gè)包引起的沖突。es依賴于18及以上版本,而HBASE只支持16及以上版本。而guava這個(gè)包從17開始內(nèi)部發(fā)生變化,方法發(fā)生改變,所以18并不會(huì)向下兼容16版本。在項(xiàng)目運(yùn)行的過程中,如果同時(shí)引入16、18版本,es及hbase的調(diào)用過程會(huì)發(fā)生混亂。那么接下來就好辦了,我們可以重新打包,將guava18打入es內(nèi)部,再在pom文件中顯示引用guava16版本的包。這樣,es調(diào)用包內(nèi)部打入的guava18,而hbase調(diào)用外部的guava16。
重新打包
新建maven工程,在pom文件中進(jìn)行如下配置:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<!--
this maven project is aim to fix the jar comflic in hbase & elasticsearch.
in es, required guava 18+ or up. but in hbase you should use guava 16- or blow.
cd the project directory and run 'sh ./cleanbuild.sh',you will get a new-self jar.
then, adjust your project pom.xml whth:
<dependency>
<groupId>douguo.shaded.elasticsearch</groupId>
<artifactId>douguo_shaded_elasticsearch</artifactId>
<version>1.0-SNAPSHOT</version>
<exclusions>
<exclusion>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
</exclusion>
</exclusions>
</dependency>
finally, your jar comflic will be fixed.
@date:2017-11-30
@author:zhangjianfei
@since:douguo.shaded.elasticsearch-1.0.0
-->
<groupId>douguo.shaded.elasticsearch</groupId>
<artifactId>douguo_shaded_elasticsearch</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<elasticsearch.version>2.4.1</elasticsearch.version>
</properties>
<dependencies>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.plugin</groupId>
<artifactId>shield</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<configuration>
<createDependencyReducedPom>false</createDependencyReducedPom>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<relocations>
<relocation>
<pattern>com.google.guava</pattern>
<shadedPattern>douguo.shaded.elasticsearch.guava</shadedPattern>
</relocation>
<relocation>
<pattern>org.joda</pattern>
<shadedPattern>douguo.shaded.elasticsearch.joda</shadedPattern>
</relocation>
<relocation>
<pattern>com.google.common</pattern>
<shadedPattern>douguo.shaded.elasticsearch.common</shadedPattern>
</relocation>
<relocation>
<pattern>com.google.thirdparty</pattern>
<shadedPattern>douguo.shaded.elasticsearch.thirdparty</shadedPattern>
</relocation>
</relocations>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer" />
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>elasticsearch-releases</id>
<url>http://maven.elasticsearch.org/releases</url>
<releases>
<enabled>true</enabled>
<updatePolicy>daily</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>將org.joda等4個(gè)可能有沖突的jar包通過maven-shade-plugin插件遷移后重新打個(gè)jar包從而使得在引入這個(gè)jar包時(shí)能夠使用該jar包自己的依賴而不是使用外部依賴。這里需要注意的是,需要將com.google.common等4個(gè)包全部重新遷移,否則會(huì)出現(xiàn)java.lang.IllegalAccessError: tried to access method com.google.common.base的錯(cuò)誤
項(xiàng)目打包
mvn clean install
新的依賴包會(huì)在.m2 maven倉(cāng)庫(kù)中,如果公司搭建了倉(cāng)庫(kù)的話,需要上傳jar包。如果直接運(yùn)行jar包的話,記得重新編譯項(xiàng)目,并替換lib目錄
項(xiàng)目載入新包
只需要在pom文件中配置:
<!-- douguo.shaded.elasticsearch --> <dependency> <groupId>douguo.shaded.elasticsearch</groupId> <artifactId>douguo_shaded_elasticsearch</artifactId> <version>1.0-SNAPSHOT</version> <exclusions> <exclusion> <groupId>org.elasticsearch</groupId> <artifactId>elasticsearch</artifactId> </exclusion> </exclusions> </dependency> <!-- https://mvnrepository.com/artifact/com.google.guava/guava --> <!-- this guava is only used in habse in es, 18.0+ is required, but hbase only supported 16.0 or blow. clean as install douguo.shaded.elasticsearch --> <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>16.0</version> </dependency>
這樣,guava18包就在douguo.shaded.elasticsearch下,es會(huì)優(yōu)先調(diào)用。而外部配置的guava16就會(huì)被HBASE調(diào)用。2個(gè)版本的jar包互相獨(dú)立存在!
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