Is the native library not available for Ubuntu? If so how do I load it? Can I tell which key is off? Since I am just starting I would want to be as up to date as possible. It is out of date probably because I copied my examples from books and tutorials.
The main class does derive from Tool. Should I ignore this warning as it seems to be in error? Thank you. On Apr 26, 2013, at 7:49 PM, Ted Xu <t...@gopivotal.com> wrote: > Hi, > > First warning is saying hadoop cannot load native library, usually a > compression codec. In that case, hadoop will use java implementation instead, > which is slower. > > Second is caused by hadoop 1.x/2.x configuration key change. You're using a > 1.x style key under 2.x, yet hadoop still guarantees backward compatibility. > > Third is saying that the main class of a hadoop application is recommanded to > implement org.apache.hadoop.util.Tool, or else generic command line options > (e.g., -D options) will not supported. > > > On Sat, Apr 27, 2013 at 5:51 AM, <rkevinbur...@charter.net> wrote: >> I am running a simple WordCount m/r job and I get output but I get five >> warnings that I am not sure if I should pay attention to: >> >> 13/04/26 16:24:50 WARN util.NativeCodeLoader: Unable to load native-hadoop >> library for your platform... using builtin-java classes where applicable >> >> 13/04/26 16:24:50 WARN conf.Configuration: session.id is deprecated. >> Instead, use dfs.metrics.session-id >> >> 13/04/26 16:24:50 WARN mapred.JobClient: Use GenericOptionsParser for >> parsing the arguments. Applications should implement Tool for the same. >> >> 13/04/26 16:24:51 WARN mapreduce.Counters: Group >> org.apache.hadoop.mapred.Task$Counter is deprecated. Use >> org.apache.hadoop.mapreduce.TaskCounter instead >> >> 13/04/26 16:24:51 WARN mapreduce.Counters: Counter name MAP_INPUT_BYTES is >> deprecated. Use FileInputFormatCounters as group name and BYTES_READ as >> counter name instead >> >> Any ideas on what these mean? The only one that I can see in the code is the >> third one. I am using GenericOptionsParser as it is part of an example that >> I copied. But I don't know why this is considered bad. >> >> Thank you. > > > > -- > Regards, > Ted Xu
