Hadoop：无法访问“跟踪网址”(Hadoop : Can't access “Tracking URL”)
我将Hadoop环境构建为伪分布式模式（在OSX上）。 下面的代码片段是配置文件。
○核心的site.xml
<configuration> <property> <name>fs.defaultFS</name> <value>hdfs://127.0.0.1:9000</value> </property> </configuration>○mapred-site.xml中
<configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> <property> <name>mapreduce.jobhistory.address</name> <value>127.0.0.1:10020</value> </property> <property> <name>mapreduce.jobhistory.webapp.address</name> <value>127.0.0.1:19888</value> </property> <property> <name>mapreduce.jobhistory.admin.address</name> <value>127.0.0.1:10033</value> </property> <property> <name>mapreduce.jobhistory.webapp.https.address</name> <value>127.0.0.1:19890</value> </property> </configuration>○纱的site.xml
<configuration> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property> <property> <name>yarn.nodemanager.webapp.https.address</name> <value>127.0.0.1:8044</value> </property> <property> <name>yarn.resourcemanager.address</name> <value>127.0.0.1:8032</value> </property> <property> <name>yarn.resourcemanager.scheduler.address</name> <value>127.0.0.1:8030</value> </property> <property> <name>yarn.resourcemanager.hostname</name> <value>localhost</value> </property> <property> <name>yarn.resourcemanager.resource-tracker.address</name> <value>127.0.0.1:8031</value> </property> <property> <name>yarn.nodemanager.disk-health-checker.max-disk-utilization-per-disk-percentage</name> <value>98.5</value> </property> <property> <name>yarn.nodemanager.hostname</name> <value>localhost</value> </property> </configuration>下面是
jps结果。79464 NameNode 79562 DataNode 79696 SecondaryNameNode 79831 ResourceManager 79945 NodeManager我可以打开“ http：// localhost：8088 ”，所以我查看了工作细节。 我点击了历史记录按钮（链接到“ http：// [private_ip_addr]：8088 / proxy / application_xxxx / ”）尝试打开“跟踪URL”（下图为工作详情页面），连接被拒绝谷歌浏览器上的错误代码是“ERR_CONNECTION_REFUSED”）。
我可以像下面的截图一样打开一个节点管理器（ http://127.0.0.1:8042 ），但是我无法打开“RM Home”（URL是“ http：// [private_ip_addr]：8088 ”）。
在配置文件时是否有错误，或者我的网络环境不正确？ 如果您需要我的网络信息（端口等），请在写入时写下它。
谢谢。
- 加成 -
（180506 23:00）
我检查了一个节点管理器日志文件。 我发现那里出现错误“无法确定操作系统”。 以下是日志文件的一部分。
2018-05-06 23:00:03,353 INFO org.apache.hadoop.yarn.event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainersLauncherEventType for class org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainersLauncher 2018-05-06 23:00:03,533 INFO org.apache.hadoop.yarn.event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.nodemanager.ContainerManagerEventType for class org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl 2018-05-06 23:00:03,534 INFO org.apache.hadoop.yarn.event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.nodemanager.NodeManagerEventType for class org.apache.hadoop.yarn.server.nodemanager.NodeManager 2018-05-06 23:00:03,642 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties 2018-05-06 23:00:03,822 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled Metric snapshot period at 10 second(s). 2018-05-06 23:00:03,822 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NodeManager metrics system started 2018-05-06 23:00:03,932 WARN org.apache.hadoop.yarn.util.ResourceCalculatorPlugin: java.lang.UnsupportedOperationException: Could not determine OS: Failed to instantiate default resource calculator. java.lang.UnsupportedOperationException: Could not determine OS at org.apache.hadoop.util.SysInfo.newInstance(SysInfo.java:43) at org.apache.hadoop.yarn.util.ResourceCalculatorPlugin.<init>(ResourceCalculatorPlugin.java:41) at org.apache.hadoop.yarn.util.ResourceCalculatorPlugin.getResourceCalculatorPlugin(ResourceCalculatorPlugin.java:191) at org.apache.hadoop.yarn.server.nodemanager.NodeResourceMonitorImpl.serviceInit(NodeResourceMonitorImpl.java:73) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163) at org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:357) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:636) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:684)（180507 14:55）
我升级到Hadoop 3.0.0，然后错误“无法确定操作系统”被删除，但仍然没有工作的任务轨道页面。
我再次检查了Nodemanager日志，然后我找到了该消息。
2018-05-07 14:53:14,803 INFO org.apache.hadoop.yarn.server.nodemanager.NodeManager: Node Manager health check script is not available or doesn't have execute permission, so not starting the node health script runner.这是一个原因吗？
（180507 16:22）
我忘了运行JobHistoryServer，所以我执行
$HADOOP_HOME/sbin/mr-jobhistory-daemon.sh start historyserver。41446 JobHistoryServer 41672 NameNode 41779 DataNode 41924 SecondaryNameNode 42128 ResourceManager 42234 NodeManager 42772 Jps看起来JobHistoryServer正在运行，但我无法打开Job Track页面。
（180507 16:38）已解决
我尝试通过点击HISTORY按钮bun访问“ http：// localhost：19888 ”来打开作业历史页面，然后我可以打开一个作业历史页面！
原因可能是
mapred-site.xml和其他人的设置属性（Phani Kumar Yadavilli先生建议）- 是否运行作业历史服务器进程。
- 通过使用URL访问，不使用历史记录按钮
- Hadoop的版本。
I constructed Hadoop environment as Pseudo distributed mode(on OSX). Below snippets are configuring files.
○core-site.xml
<configuration> <property> <name>fs.defaultFS</name> <value>hdfs://127.0.0.1:9000</value> </property> </configuration>○mapred-site.xml
<configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> <property> <name>mapreduce.jobhistory.address</name> <value>127.0.0.1:10020</value> </property> <property> <name>mapreduce.jobhistory.webapp.address</name> <value>127.0.0.1:19888</value> </property> <property> <name>mapreduce.jobhistory.admin.address</name> <value>127.0.0.1:10033</value> </property> <property> <name>mapreduce.jobhistory.webapp.https.address</name> <value>127.0.0.1:19890</value> </property> </configuration>○yarn-site.xml
<configuration> <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property> <property> <name>yarn.nodemanager.webapp.https.address</name> <value>127.0.0.1:8044</value> </property> <property> <name>yarn.resourcemanager.address</name> <value>127.0.0.1:8032</value> </property> <property> <name>yarn.resourcemanager.scheduler.address</name> <value>127.0.0.1:8030</value> </property> <property> <name>yarn.resourcemanager.hostname</name> <value>localhost</value> </property> <property> <name>yarn.resourcemanager.resource-tracker.address</name> <value>127.0.0.1:8031</value> </property> <property> <name>yarn.nodemanager.disk-health-checker.max-disk-utilization-per-disk-percentage</name> <value>98.5</value> </property> <property> <name>yarn.nodemanager.hostname</name> <value>localhost</value> </property> </configuration>And the
jpsresult is below.79464 NameNode 79562 DataNode 79696 SecondaryNameNode 79831 ResourceManager 79945 NodeManagerI could open "http://localhost:8088", so I looked job details. And I clicked The History button(link to "http://[private_ip_addr]:8088/proxy/application_xxxx/") to try to open "Tracking URL"(Below image is a job detail page), the connection was refused(The error code on google chrome is "ERR_CONNECTION_REFUSED").
I could open a node manager(http://127.0.0.1:8042) like below screenshot but I couldn't open "RM Home"(URL is "http://[private_ip_addr]:8088").
Are there any mistakes in configuring files, or my network environment is not correct? If you need my network information (port etc.), write it if you write it.
Thanks.
--addition--
(180506 23:00)
I checked A Node Manager log file. And I found the there occurred error "Could not determine OS". Below is a part of log file.
2018-05-06 23:00:03,353 INFO org.apache.hadoop.yarn.event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainersLauncherEventType for class org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainersLauncher 2018-05-06 23:00:03,533 INFO org.apache.hadoop.yarn.event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.nodemanager.ContainerManagerEventType for class org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl 2018-05-06 23:00:03,534 INFO org.apache.hadoop.yarn.event.AsyncDispatcher: Registering class org.apache.hadoop.yarn.server.nodemanager.NodeManagerEventType for class org.apache.hadoop.yarn.server.nodemanager.NodeManager 2018-05-06 23:00:03,642 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties 2018-05-06 23:00:03,822 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled Metric snapshot period at 10 second(s). 2018-05-06 23:00:03,822 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NodeManager metrics system started 2018-05-06 23:00:03,932 WARN org.apache.hadoop.yarn.util.ResourceCalculatorPlugin: java.lang.UnsupportedOperationException: Could not determine OS: Failed to instantiate default resource calculator. java.lang.UnsupportedOperationException: Could not determine OS at org.apache.hadoop.util.SysInfo.newInstance(SysInfo.java:43) at org.apache.hadoop.yarn.util.ResourceCalculatorPlugin.<init>(ResourceCalculatorPlugin.java:41) at org.apache.hadoop.yarn.util.ResourceCalculatorPlugin.getResourceCalculatorPlugin(ResourceCalculatorPlugin.java:191) at org.apache.hadoop.yarn.server.nodemanager.NodeResourceMonitorImpl.serviceInit(NodeResourceMonitorImpl.java:73) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163) at org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:107) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:357) at org.apache.hadoop.service.AbstractService.init(AbstractService.java:163) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:636) at org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:684)(180507 14:55)
I upgraded to Hadoop 3.0.0 then the error "Could not determine OS" was removed, but still, the task track page didn't work.
I checked Nodemanager log once again, then I found the message.
2018-05-07 14:53:14,803 INFO org.apache.hadoop.yarn.server.nodemanager.NodeManager: Node Manager health check script is not available or doesn't have execute permission, so not starting the node health script runner.Is this a cause?
(180507 16:22)
I forgot to run JobHistoryServer, so I execute
$HADOOP_HOME/sbin/mr-jobhistory-daemon.sh start historyserver.41446 JobHistoryServer 41672 NameNode 41779 DataNode 41924 SecondaryNameNode 42128 ResourceManager 42234 NodeManager 42772 JpsIt looks JobHistoryServer is running, but I cannot open the Job Track page.
(180507 16:38) SOLVED
I try to open job history page not by clicking HISTORY button bun accessing "http://localhost:19888", then I can open a job history page!!
The causes might be
- The setting properties of
mapred-site.xmland others(Mr. Phani Kumar Yadavilli suggested)- Whether run the Job History Server Process.
- Access by using URL, not using History buttom
- The version of Hadoop.
原文：https://stackoverflow.com/questions/50200130
更新时间：2023-10-30 19:10
最满意答案
您需要像我在小提琴中提到的那样使用jquery keyup事件。
请检查这个小提琴
如果三个认可席位的总和大于总数，我只是将文本框的值留空。
我也有cleare 3文本框，如果你提供整个文本框
Open this link： https ： //jsfiddle.net/5y6na3wr/7/You need to use jquery keyup event as I mentioned in fiddle.
Please check this fiddle
Here I just made textbox value blank if sum of three sanctioned seats are greater than total.
Also i have cleare 3 textbox if you chane total textbox
Open this link: https://jsfiddle.net/5y6na3wr/7/
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