Re: command to reload log4j settings for a JobTracker?

Hey Zheng, I don't know that there's a command to reload the properties file, but you can use the "hadoop daemonlog" command to change an individual logger at runtime. e.g: t...@todd-laptop:~$ hadoop-0.20 daemonlog -getlevel localhost:50030 org.apache.hadoop Connecting to http://localhost:50030/l

command to reload log4j settings for a JobTracker?

Hi, Is there a command for JobTracker to reload the log4j settings at runtime? Thanks, Zheng

Re: Reducer output records = 0? (0.20.1)

That was bug in 0.20. Got fixed in 0.20.2 through MAPREDUCE-112 Thanks Amareshwari tim robertson wrote: Hi all, I have a Reducer with the following (using new API): public static class Transpose extends Reducer { @Override protected void reduce(Text key, Iterable values,

Execute Code on Task Failure

Hallo Currently I am using Hadoop version 0.19.0. During my Map task operation, I allocate a variety of resources in the form of opening and reading files as well as, in particular, spawn a seperate Java Process to execute a system call to do some work. This Process can potentially execute for a

Reducer output records = 0? (0.20.1)

Hi all, I have a Reducer with the following (using new API): public static class Transpose extends Reducer { @Override protected void reduce(Text key, Iterable values, Context context) throws IOException, InterruptedException { int c