rowid job failing (when parsing options)
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Key: MAHOUT-839
URL: https://issues.apache.org/jira/browse/MAHOUT-839
Project: Mahout
Issue Type: Bug
Reporter: Dan Brickley
Although MAHOUT-757 moved towards standard option naming, it uses different
APIs for option parsing than other jobs.
On my system, it died reliably with null pointer error. Reported in mail here,
but not reconfirmed by anyone else yet:
http://permalink.gmane.org/gmane.comp.apache.mahout.user/9659
Example:
TellyClub:bin danbri$ ./mahout rowid --help
MAHOUT_LOCAL is not set; adding HADOOP_CONF_DIR to classpath.
Running on hadoop, using HADOOP_HOME=/Users/danbri/working/hadoop/hadoop-0.20.2
HADOOP_CONF_DIR=/Users/danbri/working/hadoop/hadoop-0.20.2/conf
MAHOUT-JOB:
/Users/danbri/working/mahout/trunk/examples/target/mahout-examples-0.6-SNAPSHOT-job.jar
^CTellyClub:bin danbri$ MAHOUT_LOCAL=true ./mahout rowid --help
MAHOUT_LOCAL is set, so we don't add HADOOP_CONF_DIR to classpath.
MAHOUT_LOCAL is set, running locally
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in
[jar:file:/Users/bandri/working/mahout/trunk/examples/target/mahout-examples-0.6-SNAPSHOT-job.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in
[jar:file:/Users/bandri/working/mahout/trunk/examples/target/dependency/slf4j-jcl-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in
[jar:file:/Users/bandri/working/mahout/trunk/examples/target/dependency/slf4j-log4j12-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
Exception in thread "main" java.lang.NullPointerException
at org.apache.hadoop.fs.Path.<init>(Path.java:61)
at org.apache.hadoop.fs.Path.<init>(Path.java:50)
at org.apache.mahout.utils.vectors.RowIdJob.run(RowIdJob.java:49)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at org.apache.mahout.utils.vectors.RowIdJob.main(RowIdJob.java:89)
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:188)
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