INFO metrics.MetricsUtil: Unable to obtain hostName

本文记录了在运行Hadoop WordCount任务时遇到的主机名解析错误,详细展示了错误日志,并提供了检查hostname配置及/etc/hosts文件的解决思路。

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修改hostname时,也应该在/etc/hosts里修改对应的映射名称。。

[root@Node-01 hadoop-2.5.2]# hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-2.5.2.jar wordcount /home/input/ /home/output
Java HotSpot(TM) Client VM warning: You have loaded library /usr/local/hadoop-2.5.2/lib/native/libhadoop.so.1.0.0 which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
19/04/23 00:11:07 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
19/04/23 00:11:07 INFO Configuration.deprecation: session.id is deprecated. Instead, use dfs.metrics.session-id
19/04/23 00:11:07 INFO jvm.JvmMetrics: Initializing JVM Metrics with processName=JobTracker, sessionId=
19/04/23 00:11:07 INFO metrics.MetricsUtil: Unable to obtain hostName
java.net.UnknownHostException: Node-01: Node-01
	at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
	at org.apache.hadoop.metrics.MetricsUtil.getHostName(MetricsUtil.java:95)
	at org.apache.hadoop.metrics.MetricsUtil.createRecord(MetricsUtil.java:84)
	at org.apache.hadoop.metrics.jvm.JvmMetrics.<init>(JvmMetrics.java:87)
	at org.apache.hadoop.metrics.jvm.JvmMetrics.init(JvmMetrics.java:78)
	at org.apache.hadoop.metrics.jvm.JvmMetrics.init(JvmMetrics.java:65)
	at org.apache.hadoop.mapred.LocalJobRunnerMetrics.<init>(LocalJobRunnerMetrics.java:40)
	at org.apache.hadoop.mapred.LocalJobRunner.<init>(LocalJobRunner.java:714)
	at org.apache.hadoop.mapred.LocalJobRunner.<init>(LocalJobRunner.java:707)
	at org.apache.hadoop.mapred.LocalClientProtocolProvider.create(LocalClientProtocolProvider.java:42)
	at org.apache.hadoop.mapreduce.Cluster.initialize(Cluster.java:95)
	at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:82)
	at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:75)
	at org.apache.hadoop.mapreduce.Job$9.run(Job.java:1255)
	at org.apache.hadoop.mapreduce.Job$9.run(Job.java:1251)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
	at org.apache.hadoop.mapreduce.Job.connect(Job.java:1250)
	at org.apache.hadoop.mapreduce.Job.submit(Job.java:1279)
	at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
	at org.apache.hadoop.examples.WordCount.main(WordCount.java:87)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
	at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:145)
	at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: java.net.UnknownHostException: Node-01
	at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
	at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
	... 33 more
19/04/23 00:11:08 INFO metrics.MetricsUtil: Unable to obtain hostName
java.net.UnknownHostException: Node-01: Node-01
	at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
	at org.apache.hadoop.metrics.MetricsUtil.getHostName(MetricsUtil.java:95)
	at org.apache.hadoop.metrics.MetricsUtil.createRecord(MetricsUtil.java:84)
	at org.apache.hadoop.mapred.LocalJobRunnerMetrics.<init>(LocalJobRunnerMetrics.java:44)
	at org.apache.hadoop.mapred.LocalJobRunner.<init>(LocalJobRunner.java:714)
	at org.apache.hadoop.mapred.LocalJobRunner.<init>(LocalJobRunner.java:707)
	at org.apache.hadoop.mapred.LocalClientProtocolProvider.create(LocalClientProtocolProvider.java:42)
	at org.apache.hadoop.mapreduce.Cluster.initialize(Cluster.java:95)
	at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:82)
	at org.apache.hadoop.mapreduce.Cluster.<init>(Cluster.java:75)
	at org.apache.hadoop.mapreduce.Job$9.run(Job.java:1255)
	at org.apache.hadoop.mapreduce.Job$9.run(Job.java:1251)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
	at org.apache.hadoop.mapreduce.Job.connect(Job.java:1250)
	at org.apache.hadoop.mapreduce.Job.submit(Job.java:1279)
	at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
	at org.apache.hadoop.examples.WordCount.main(WordCount.java:87)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
	at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:145)
	at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: java.net.UnknownHostException: Node-01
	at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
	at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
	... 30 more
java.net.UnknownHostException: Node-01: Node-01
	at java.net.InetAddress.getLocalHost(InetAddress.java:1473)
	at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:350)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
	at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:415)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
	at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
	at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
	at org.apache.hadoop.examples.WordCount.main(WordCount.java:87)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:72)
	at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:145)
	at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:74)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: java.net.UnknownHostException: Node-01
	at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
	at java.net.InetAddress.getLocalHost(InetAddress.java:1469)
	... 21 more
[root@Node-01 hadoop-2.5.2]# hostname
Node-01
[root@Node-01 hadoop-2.5.2]# vi /etc/hosts
[root@Node-01 hadoop-2.5.2]# vi /etc/sysconfig/network
[root@Node-01 hadoop-2.5.2]# vi /etc/hosts

 

The error message "Unable to initialize main class edu.anu.spice.SpiceScorer" typically occurs when trying to run a Java program that uses the SPICE (Software Product Improvement Criteria Evaluation) scorer from the Australian National University. SPICE is a tool for evaluating software product metrics. To compute the SPICE score, you would usually follow these steps: 1. **Ensure proper setup**: Make sure you have Java Development Kit (JDK) installed and configured correctly on your system, as the error suggests an issue with initializing the main class, which implies a Java application. 2. **Verify the classpath**: Check if the `edu.anu.spice.SpiceScorer` class can be found in the specified package or the correct directory in your classpath. You may need to include the SPICE library's jar file in your project's build path. 3. **Command execution**: If you're running the program from the command line, use the following format: ```sh java -classpath <path_to_spice_jar>:<other_classpaths> edu.anu.spice.SpiceScorer <arguments> ``` Replace `<path_to_spice_jar>` with the actual location of the SPICE JAR file and provide any necessary command-line arguments. 4. **Error handling**: If the problem persists, check for any syntax errors in your code, missing dependencies, or if there are issues with the configuration file required by the SPICE scorer. 5. **Debugging logs**: If possible, look at the error log for more detailed information about what went wrong during initialization. If you encounter this error while using a specific tool or framework that wraps SPICE, consult its documentation or seek help from the community where you encountered the tool.
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