storm、hbase、kafka整合过程中遇到的log4j冲突问题

storm、hbase、kafka整合过程中遇到的log4j冲突问题

---》报错
SLF4J: Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError.
SLF4J: See also http://www.slf4j.org/codes.html#log4jDelegationLoop for more details.

10059 [Thread-15-KafkaSpout] ERROR backtype.storm.util - Async loop died!
java.lang.NoClassDefFoundError: Could not initialize class org.apache.log4j.Log4jLoggerFactory
at org.apache.log4j.Logger.getLogger(Logger.java:39) ~[log4j-over-slf4j-1.6.6.jar:1.6.6]
at kafka.utils.Logging$class.logger(Logging.scala:24) ~[kafka_2.11-0.8.2.1.jar:na]

---》原因
log4j-over-slf4j.jar AND slf4j-log4j12.jar 循环调用冲突了，再进一步原因是kafka、hbase中用的是log4j。

---》解决方法

* 方案一：把storm中的log4j-over-slf4j 依赖排除；

<dependency><groupId>org.apache.storm</groupId><artifactId>storm-core</artifactId><version>0.9.5</version><scope>provided</scope><exclusions><exclusion><groupId>org.slf4j</groupId><artifactId>log4j-over-slf4j</artifactId></exclusion></exclusions></dependency><dependency><groupId>org.apache.kafka</groupId><artifactId>kafka_2.11</artifactId><version>0.8.2.1</version></dependency><dependency><groupId>org.apache.hbase</groupId><artifactId>hbase-client</artifactId><version>1.0.1.1</version></dependency>

* 方案二：把kafka和hbase中的slf4j-log4j12 依赖排除；

<dependency><groupId>org.apache.storm</groupId><artifactId>storm-core</artifactId><version>0.9.5</version><scope>provided</scope><exclusions><exclusion><groupId>org.slf4j</groupId><artifactId>log4j-over-slf4j</artifactId></exclusion><exclusion><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId></exclusion></exclusions>
			 --></dependency><dependency><groupId>org.apache.kafka</groupId><artifactId>kafka_2.11</artifactId><version>0.8.2.1</version><exclusions><exclusion><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId></exclusion><exclusion><groupId>log4j</groupId><artifactId>log4j</artifactId></exclusion></exclusions></dependency><dependency><groupId>org.apache.hbase</groupId><artifactId>hbase-client</artifactId><version>1.0.1.1</version><exclusions><exclusion><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId></exclusion><exclusion><groupId>log4j</groupId><artifactId>log4j</artifactId></exclusion></exclusions>			</dependency><!-- <dependency><groupId>org.apache.hbase</groupId><artifactId>hbase-common</artifactId><version>1.0.1.1</version></dependency>
		 --><dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>2.7.0</version></dependency>

* 采用方案二便于集群发布
* storm的日志时采用的 SLF4J和Logback日志框架，所以自己写的storm代码统一使用 slf4j 的包，可以避免大多数包冲突问题。

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class MyBolt {
    private static final Logger LOG = LoggerFactory
            .getLogger(MyBolt.class);
}

---》参考
http://www.tuicool.com/articles/aIzyqiy
http://stackoverflow.com/questions/21630860/storm-topology-not-submit
http://blog.csdn.net/gongmf/article/details/40379547

已有 0人发表留言，猛击->> 这里<<-参与讨论


ITeye推荐

• —软件人才免语言低担保 赴美带薪读研！—