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From Serega Sheypak <serega.shey...@gmail.com>
Subject Re: No applicable class implementing Serialization in conf at io.serializations: class org.apache.hadoop.hbase.client.Put
Date Sun, 02 Nov 2014 21:53:40 GMT
I use it to prepare HFile using my custom mapper emitting Put and
  HFileOutputFormat.configureIncrementalLoad(job, createHTable())
//connection to target table

and then bulk load data to table using LoadIncrementalHFiles

P.S.
HFileOutputFormat is also deprecated... so many changes... (((


2014-11-03 0:41 GMT+03:00 Sean Busbey <busbey@cloudera.com>:

> In the 0.94.x API, Put implemented Writable[1]. This meant that MR code,
> like yours, could use it as a Key or Value between Mapper and Reducer.
>
> In 0.96 and later APIs, Put no longer directly implements Writable[2].
> Instead, HBase now includes a Hadoop Seriazliation implementation.
> Normally, this would be configured via the TableMapReduceUtil class for
> either a TableMapper or TableReducer.
>
> Presuming that the intention of your MR job is to have all the Puts write
> to some HBase table, you should be able to follow the "write to HBase" part
> of the examples for reading and writing HBase via mapreduce in the
> reference guide[3].
>
> Specifically, you should have your Driver call one of the
> initTableReducerJob methods on TableMapReduceUtil, where it currently sets
> the Mapper class for your application[4].
>
> -Sean
>
> [1]:
>
> http://hbase.apache.org/0.94/apidocs/org/apache/hadoop/hbase/client/Put.html
> [2]:
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/Put.html
> [3]: http://hbase.apache.org/book/mapreduce.example.html
> [4]:
>
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/mapreduce/TableMapReduceUtil.html
>
>
> On Sun, Nov 2, 2014 at 3:02 PM, Serega Sheypak <serega.sheypak@gmail.com>
> wrote:
>
> > Hi, I'm migrating from CDH4 to CDH5 (hbase 0.98.6-cdh5.2.0)
> > I had a unit test for mapper used to create HFile and bulk load later.
> >
> > I've bumped maven deps from cdh4 to cdh5 0.98.6-cdh5.2.0
> > Now I've started to get exception
> >
> > java.lang.IllegalStateException: No applicable class implementing
> > Serialization in conf at io.serializations: class
> > org.apache.hadoop.hbase.client.Put
> > at
> com.google.common.base.Preconditions.checkState(Preconditions.java:149)
> > at
> >
> >
> org.apache.hadoop.mrunit.internal.io.Serialization.copy(Serialization.java:75)
> > at
> >
> >
> org.apache.hadoop.mrunit.internal.io.Serialization.copy(Serialization.java:97)
> > at
> >
> >
> org.apache.hadoop.mrunit.internal.output.MockOutputCollector.collect(MockOutputCollector.java:48)
> > at
> >
> >
> org.apache.hadoop.mrunit.internal.mapreduce.AbstractMockContextWrapper$4.answer(AbstractMockContextWrapper.java:90)
> > at
> >
> >
> org.mockito.internal.stubbing.StubbedInvocationMatcher.answer(StubbedInvocationMatcher.java:34)
> > at
> >
> >
> org.mockito.internal.handler.MockHandlerImpl.handle(MockHandlerImpl.java:91)
> > at
> >
> >
> org.mockito.internal.handler.NullResultGuardian.handle(NullResultGuardian.java:29)
> > at
> >
> >
> org.mockito.internal.handler.InvocationNotifierHandler.handle(InvocationNotifierHandler.java:38)
> > at
> >
> >
> org.mockito.internal.creation.MethodInterceptorFilter.intercept(MethodInterceptorFilter.java:51)
> > at
> >
> >
> org.apache.hadoop.mapreduce.Mapper$Context$$EnhancerByMockitoWithCGLIB$$ba4633fb.write(<generated>)
> >
> >
> > And here is mapper code:
> >
> >
> >
> > public class ItemRecommendationHBaseMapper extends Mapper<LongWritable,
> > BytesWritable, ImmutableBytesWritable, Put> {
> >
> >     private final ImmutableBytesWritable hbaseKey = new
> > ImmutableBytesWritable();
> >     private final DynamicObjectSerDe<ItemRecommendation> serde = new
> > DynamicObjectSerDe<ItemRecommendation>(ItemRecommendation.class);
> >
> >     @Override
> >     protected void map(LongWritable key, BytesWritable value, Context
> > context) throws IOException, InterruptedException {
> >         checkPreconditions(key, value);
> >         hbaseKey.set(Bytes.toBytes(key.get()));
> >
> >         ItemRecommendation item = serde.deserialize(value.getBytes());
> >         checkPreconditions(item);
> >         Put put = PutFactory.createPut(serde, item, getColumnFamily());
> >
> >         context.write(hbaseKey, put); //Exception here
> >     }
> >
> > Whatcan i do in order to make unit-test pass?
> >
>
>
>
> --
> Sean
>

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