Hi
I'm just starting with mapreduce. Examples worked fine, so I started
doing my stuff.
Strange thing happened and I can't figure out what's going on :
no problem with this one :
public void map(Key key, Entity value, Context context) {
if (value.getProperty("my_boolean").equals(true))
{
}
But if instead of a boolean I want to use a Flag (basically a
dataobject, an enum of strings...)
public void map(Key key, Entity value, Context context) {
if (value.getProperty("my_flag").equals(Flag.STATUS_NOT_TREATED))
{
}
then ....
ATTENTION: /mapreduce/mapperCallback
java.lang.NullPointerException
at com.fiftyfive.multitouchpoint.mapper.Mapper.map(Mapper.java:48)
at com.fiftyfive.multitouchpoint.mapper.Mapper.map(Mapper.java:1)
at
com.google.appengine.tools.mapreduce.MapReduceServlet.processMapper(MapReduceServlet.java:
608)
at
com.google.appengine.tools.mapreduce.MapReduceServlet.handleMapperWorker(MapReduceServlet.java:
658)
at
com.google.appengine.tools.mapreduce.MapReduceServlet.doPost(MapReduceServlet.java:
227)
I don't understand why callbacking ? Beyond that, the
NullPointerException shall be caused because of non defining a
callback point in my mapreduce.xml, but I don't want a callback right
now !
Thanks.
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