Hi Sonal, AFAIK,this exception mostly has no impact other than to indicate object creation.I agree Hadoop configuration class can be improved to handle it.
Refer http://osdir.com/ml/hbase-user-hadoop-apache/2009-03/msg00280.html Thanks & Regards, /R On 11/19/09 11:29 AM, "Sonal Goyal" <sonalgoy...@gmail.com> wrote: Hi, I am running Hadoop standalone to test some functionality. I have set the log level to DEBUG and I see the following exception: DEBUG conf.Configuration: java.io.IOException: config(config) at org.apache.hadoop.conf.Configuration.<init>(Configuration.java:225) at org.apache.hadoop.mapred.JobConf.<init>(JobConf.java:183) at org.apache.hadoop.mapreduce.JobContext.<init>(JobContext.java:52) at org.apache.hadoop.mapreduce.TaskAttemptContext.<init>(TaskAttemptContext.java:35) at org.apache.hadoop.mapreduce.TaskInputOutputContext.<init>(TaskInputOutputContext.java:44) at org.apache.hadoop.mapreduce.ReduceContext.<init>(ReduceContext.java:68) at org.apache.hadoop.mapreduce.Reducer$Context.<init>(Reducer.java:132) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.apache.hadoop.mapred.Task.createReduceContext(Task.java:1053) at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:558) at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:408) at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:215) I checked the source, and I see the org.apache.hadoop.conf.Configuration file has code: if (LOG.isDebugEnabled()) { LOG.debug(StringUtils.stringifyException (new IOException("config(config)"))); } I am bafflled by this block of code. Why is an IOException being thrown if the log level is set to DEBUG ? It would be great if someone could shed some light on this. Thanks, Sonal
