Can'；不要让apache nutch爬网-怀疑权限和JAVA_主页

我正在尝试按照以下步骤运行基本爬网：

所以我用Solr安装了Nutch。我将

.bashrc

中的$JAVA_HOME设置为

/usr/lib/jvm/JAVA-1.6.0-openjdk-amd64

当我从nutch主目录运行

bin/nutch

时，我看不到任何问题，但当我尝试按上述方式运行爬网时，我得到以下错误：

log4j:ERROR setFile(null,true) call failed.
java.io.FileNotFoundException: /usr/share/nutch/logs/hadoop.log (Permission denied)
        at java.io.FileOutputStream.openAppend(Native Method)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:207)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:131)
        at org.apache.log4j.FileAppender.setFile(FileAppender.java:290)
        at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:164)
        at org.apache.log4j.DailyRollingFileAppender.activateOptions(DailyRollingFileAppender.java:216)
        at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:257)
        at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:133)
        at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:97)
        at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:689)
        at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:647)
        at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:544)
        at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:440)
        at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:476)
        at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:471)
        at org.apache.log4j.LogManager.<clinit>(LogManager.java:125)
        at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73)
        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:270)
        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281)
        at org.apache.nutch.crawl.Crawl.<clinit>(Crawl.java:43)
log4j:ERROR Either File or DatePattern options are not set for appender [DRFA].
solrUrl is not set, indexing will be skipped...
crawl started in: crawl
rootUrlDir = urls
threads = 10
depth = 3
solrUrl=null
topN = 5
Injector: starting at 2013-06-28 16:24:53
Injector: crawlDb: crawl/crawldb
Injector: urlDir: urls
Injector: Converting injected urls to crawl db entries.
Injector: total number of urls rejected by filters: 0
Injector: total number of urls injected after normalization and filtering: 1
Injector: Merging injected urls into crawl db.
Exception in thread "main" java.io.IOException: Job failed!
        at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1357)
        at org.apache.nutch.crawl.Injector.inject(Injector.java:296)
        at org.apache.nutch.crawl.Crawl.run(Crawl.java:132)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.nutch.crawl.Crawl.main(Crawl.java:55)

---

所以我觉得我遇到了第22条军规。我应该能够用

sudo

运行这个命令吗，或者我还需要做些什么，这样我就不必用

sudo

运行它了，或者这里完全是在做别的事情吗？

看起来，作为一个普通用户，你没有权限写入

/usr/share/nutch/logs/hadoop.log

，作为安全特性，这是有意义的

要解决此问题，请创建一个简单的bash脚本：

#!/bin/sh
export JAVA_HOME=/usr/lib/jvm/java-1.6.0-openjdk-amd64
bin/nutch crawl urls -dir crawl -depth 3 -topN 5

将其另存为

nutch.sh

，然后使用

sudo

运行它：

sudo sh nutch.sh

---

解决此问题的关键是将

JAVA\u HOME

变量添加到

sudo

环境中。例如，键入

env

和

sudo env

，您将看到

JAVA\u HOME

未设置为

sudo

。要解决此问题，您需要添加路径

运行

sudovisudo

编辑您的

/etc/sudoers

文件。（不要使用标准文本编辑器。这是一个特殊的vi文本编辑器，它将在允许您保存之前验证语法。）

添加此行：

Defaults env_keep+="JAVA_HOME"

在

Defaults env_keep

部分的末尾

重新启动

sudo sh nutch.sh

Defaults env_keep+="JAVA_HOME"