Hi,
I am trying to pass a parameter to multiple mappers
So, I do this in my driver
conf.set("delimiter", args[3]);
In mapper1, I am retreiving this as:
Configuration conf = context.getConfiguration();
String[] values = value.toString().split(conf.get("delimiter"));
and same is my mapper2
But I get this error:
13/08/06 16:38:09 INFO mapred.JobClient: Task Id :
attempt_201306191416_1384_m_000001_0, Status : FAILED
java.lang.NullPointerException
at java.util.regex.Pattern.<init>(Pattern.java:1149)
at java.util.regex.Pattern.compile(Pattern.java:840)
at java.lang.String.split(String.java:2304)
at java.lang.String.split(String.java:2346)
at DataSourceOneMapper.map(DataSourceOneMapper.java:22)
at .DataSourceOneMapper.map(DataSourceOneMapper.java:1)
And the line 22 corresponds to this conf.get("...") line
What am i doing wrong?
Also, just to add, in this particular case delimiter is "@"
So, if i do
String[] values = value.toString().split("@");
everything works fine??
How do i resolve this?
Thanks
