上传文件到zookeeper报错：ERROR Could not read configuration file from URL [file:./log4j.properties]

一、问题描述

CDH环境下，将solr配置文件上传到zookeeper时，遇见报错缺少log4j.properties文件

# cd /opt/cloudera/parcels/CDH/lib/solr/bin
# ./zkcli.sh -zkhost ip1:2181,ip2:2181,i3:2181/solr -cmd upconfig -confdir /opt/tmp/conf -confname myconf
报错：
log4j:ERROR Could not read configuration file from URL [file:./log4j.properties].
java.io.FileNotFoundException: ./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.(FileInputStream.java:138)
        at java.io.FileInputStream.(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.(LogManager.java:127)
        at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:66)
        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:270)
        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281)
        at org.apache.solr.common.cloud.ZkStateReader.(ZkStateReader.java:59)
        at org.apache.solr.cloud.ZkCLI.main(ZkCLI.java:210)
log4j:ERROR Ignoring configuration file [file:./log4j.properties].
log4j:WARN No appenders could be found for logger (org.apache.solr.common.cloud.SolrZkClient).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

二、问题原因

CDH的solr真是坑，这个问题原因已经很清楚了，就是在 /opt/cloudera/parcels/CDH/lib/solr/bin文件里缺少l配置文件log4j.properties，所以，去apache版本的solr的log4j.properties文件内容拷贝到这个文件夹内。

三、解决办法

拷贝solr-4.10.3-apache/example/scripts/cloud-scripts/log4j.properties文件下的内容，到CDH节点上，没有就创建：

vi opt/cloudera/parcels/CDH/lib/solr/bin/log4j.properties
添加
#  Logging level
log4j.rootLogger=INFO, stderr

# log to stderr
log4j.appender.stderr = org.apache.log4j.ConsoleAppender
log4j.appender.stderr.Target = System.err
log4j.appender.stderr.layout = org.apache.log4j.PatternLayout
log4j.appender.stderr.layout.ConversionPattern=%-5p - %d{yyyy-MM-dd HH:mm:ss.SSS}; %C; %m\n