我正在尝试运行 Terasort 基准测试,但出现以下异常:
java.lang.RuntimeException: Error in configuring object
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
at org.apache.hadoop.mapred.MapTask$OldOutputCollector.<init>(MapTask.java:573)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:435)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:371)
at org.apache.hadoop.mapred.Child$4.run(Child.java:259)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1059)
at org.apache.hadoop.mapred.Child.main(Child.java:253)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
... 10 more
Caused by: java.lang.IllegalArgumentException: can't read paritions file
at org.apache.hadoop.examples.terasort.TeraSort$TotalOrderPartitioner.configure(TeraSort.java:213)
... 15 more
Caused by: java.io.FileNotFoundException: File _partition.lst does not exist.
at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:371)
at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:245)
at org.apache.hadoop.fs.FileSystem.getLength(FileSystem.java:720)
at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1417)
at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1412)
at org.apache.hadoop.examples.terasort.TeraSort$TotalOrderPartitioner.readPartitions(TeraSort.java:153)
at org.apache.hadoop.examples.terasort.TeraSort$TotalOrderPartitioner.configure(TeraSort.java:210)
... 15 more
TeraGen 命令运行良好,并为 TeraSort 创建了输入文件。这是我的输入目录的列表:
bin/hadoop fs -ls /user/hadoop/terasort-input/Warning: Maximum heap size rounded up to 1024 MB
Found 5 items
-rw-r--r-- 1 sqatest supergroup 0 2012-01-23 14:13 /user/hadoop/terasort-input/_SUCCESS
drwxr-xr-x - sqatest supergroup 0 2012-01-23 13:30 /user/hadoop/terasort-input/_logs
-rw-r--r-- 1 sqatest supergroup 129 2012-01-23 15:49 /user/hadoop/terasort-input/_partition.lst
-rw-r--r-- 1 sqatest supergroup 50000000000 2012-01-23 13:30 /user/hadoop/terasort-input/part-00000
-rw-r--r-- 1 sqatest supergroup 50000000000 2012-01-23 13:30 /user/hadoop/terasort-input/part-00001
这是我运行 terasort 的命令:
bin/hadoop jar hadoop-examples-0.20.203.0.jar terasort -libjars hadoop-examples-0.20.203.0.jar /user/hadoop/terasort-input /user/hadoop/terasort-output
我确实在我的输入目录中看到文件 _partition.lst,我不明白为什么我会收到 FileNotFoundException。
我遵循了以下位置提供的设置详细信息:http://www.michael-noll.com/blog/2011/04/09/benchmarking-and-stress-testing-an-hadoop-cluster-with-terasort-testdfsio-nnbench-mrbench/
最佳答案
我让它按如下方式工作:
我在本地模式下从我的 hadoop 基本目录运行,hadoop-1.0.0 下有一个输入子目录,我得到了和你一样的错误。
我编辑了失败的 java 文件,让它记录路径而不是文件名,重建它(“ant binary”),然后重新运行它。它在我运行的目录中寻找文件。我不知道它是在查找 hadoop 基本目录还是执行目录。
...所以我在运行 terasort 的目录中创建了一个符号链接(symbolic link),指向输入目录中的真实文件。
这是一个廉价的 hack,但它有效。
- Tim.
关于java - Hadoop:配置对象时出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8980412/