未找到输入集群，请检查集群中的 -c 参数错误

Question

1.seq目录

mahout seqdirectory --input /user/hdfs/input/new1.csv --output /user/hdfs/new1/seqdirectory --tempDir /user/hdfs/new1/seqdirectory/tempDir

2.seq2sparse

mahout seq2sparse --input /user/hdfs/new1/seqdirectory --output /user/hdfs/new1/seq2sparse -wt tfidf

3.kmeans

mahout kmeans --input /user/hdfs/new1/seq2sparse/tfidf-vectors --output /user/hdfs/new1/kmeans -c /user/hdfs/new1/clusters/kmeans -x 3 -k 3 --tempDir /user/hdfs/new1/kmeans/tempDir

然后出现错误

Failing Oozie Launcher, Main class [org.apache.mahout.driver.MahoutDriver], main() threw exception, No input clusters found in /user/oozie/mahout/new1/clusters/part-randomSeed. Check your -c argument.
java.lang.IllegalStateException: No input clusters found in /user/oozie/mahout/new1/clusters/part-randomSeed. Check your -c argument.
    at org.apache.mahout.clustering.kmeans.KMeansDriver.buildClusters(KMeansDriver.java:217)
    at org.apache.mahout.clustering.kmeans.KMeansDriver.run(KMeansDriver.java:148)
    at org.apache.mahout.clustering.kmeans.KMeansDriver.run(KMeansDriver.java:107)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
    at org.apache.mahout.clustering.kmeans.KMeansDriver.main(KMeansDriver.java:48)
    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.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
    at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
    at org.apache.mahout.driver.MahoutDriver.main(MahoutDriver.java:195)
    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.oozie.action.hadoop.LauncherMapper.map(LauncherMapper.java:467)
    at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
    at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:436)
    at org.apache.hadoop.mapred.MapTask.run(MapTask.java:372)
    at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
    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:1149)
    at org.apache.hadoop.mapred.Child.main(Child.java:249)

Oozie Launcher failed, finishing Hadoop job gracefully


Oozie Launcher ends

为什么kmeans驱动不能用oozie系统在Hadoop中创建集群？ 在没有 oozie 系统的 hadoop 中，它可以工作。

影响版本/秒：MAHOUT 0.7、0.8-SNAPSHOT

Answer 1

使用 -c /user/hdfs/new1/clusters/kmeans 选项， 我们需要确保集群可用。

这可以帮助https://cwiki.apache.org/confluence/display/MAHOUT/K-Means+Clustering 请检查 c 选项。