All logs (including stdout/stderr) should be accessible from the web-UI. You should navigate to the YARN web application and then to the MapReduce specific pages from there.
+Vinod On Feb 19, 2015, at 8:46 AM, xeonmailinglist <[email protected]> wrote: > I have this map function that is printing something to the system output, but > I can't find the output. > Where YARN prints the logs of the function of map and reduce defined by the > user? > public static class TokenizerMapper > extends Mapper<Object, Text, Text, IntWritable>{ > > private final static IntWritable one = new IntWritable(1); > private Text word = new Text(); > > public void map(Object key, Text value, Context context > ) throws IOException, InterruptedException { > System.out.println(value.toString()); > StringTokenizer itr = new StringTokenizer(value.toString()); > while (itr.hasMoreTokens()) { > word.set(itr.nextToken()); > context.write(word, one); > } > } > } > > > -- CONFIDENTIALITY NOTICE NOTICE: This message is intended for the use of the individual or entity to which it is addressed and may contain information that is confidential, privileged and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient, you are hereby notified that any printing, copying, dissemination, distribution, disclosure or forwarding of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and delete it from your system. Thank You.
signature.asc
Description: Message signed with OpenPGP using GPGMail
