今天在使用kafka的時候，進行以下指令測試時報了個錯誤：
./lib/kafka/bin/connect-distributed.sh ./etc/kafka/conf.dist/connect-distributed-Oracle.properties ./etc/kafka/conf.dist/OracleSourceConnector.properties
[root@cluster2-4 KAFKA-4.1.0-1.4.1.0.p0.4]# ./lib/kafka/bin/connect-distributed.sh ./etc/kafka/conf.dist/connect-distributed-Oracle.properties ./etc/kafka/conf.dist/OracleSourceConnector.properties
log4j:ERROR Could not read configuration file from URL [file:./lib/kafka/bin/../config/connect-log4j.properties].
java.io.FileNotFoundException: ./lib/kafka/bin/../config/connect-log4j.properties (No such file or directory)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at java.io.FileInputStream.<init>(FileInputStream.java:93)
at sun.net.www.protocol.file.FileURLConnection.connect(FileURLConnection.java:90)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(FileURLConnection.java:188)
at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:557)
at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:66)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:358)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383)
at org.apache.kafka.connect.cli.ConnectDistributed.<clinit>(ConnectDistributed.java:55)
log4j:ERROR Ignoring configuration file [file:./lib/kafka/bin/../config/connect-log4j.properties].
log4j:WARN No appenders could be found for logger (org.apache.kafka.connect.runtime.WorkerInfo).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
可以很明顯的看出錯誤提示是找不到connect-log4j.properties這個配置文件。網上有些人說把這個文件弄到config中就好了，但是我看了我這個config文件中，其實有這個文件：
解決辦法：
將配置文件的路徑指向這個路徑，執行如下命令：
export KAFKA_LOG4J_OPTS=-Dlog4j.configuration=file:/opt/cloudera/parcels/KAFKA/etc/kafka/conf.dist/connect-log4j.properties
我這個是CDH中安裝的kafka，所以路徑可能會不太一樣。這樣指定以後就可以了，在執行也不會報錯了：
