KYLIN-3714 Register kryo for spark spilling process.

[Sidonet]

After patch was applied in my env, i test it.

In my test case, i set properties
kylin.engine.spark-conf.spark.driver.memory=2G
kylin.engine.spark-conf.spark.executor.memory=512M

Launch build a huge cube, with no mapreduce.input.fileinputformat.split at all.

The most huge data goes to executor 20 (4.6G) and spark spilling process goes here:

2019-02-26 17:55:13 INFO ShuffleBlockFetcherIterator:54 - Getting 3898 non-empty blocks out of 3898 blocks
2019-02-26 17:55:13 INFO ShuffleBlockFetcherIterator:54 - Started 6 remote fetches in 39 ms
2019-02-26 17:55:15 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 97.5 MB to disk (1 time so far)
2019-02-26 17:55:40 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 97.5 MB to disk (2 times so far)
2019-02-26 17:56:02 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 97.6 MB to disk (3 times so far)
2019-02-26 17:56:25 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 97.5 MB to disk (4 times so far)
2019-02-26 17:56:54 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 99.2 MB to disk (5 times so far)
2019-02-26 17:57:18 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 97.5 MB to disk (6 times so far)
2019-02-26 17:57:42 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 98.4 MB to disk (7 times so far)
2019-02-26 17:58:09 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 99.2 MB to disk (8 times so far)
2019-02-26 17:58:34 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 97.5 MB to disk (9 times so far)
2019-02-26 17:58:54 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 97.5 MB to disk (10 times so far)
2019-02-26 17:59:17 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 99.2 MB to disk (11 times so far)
2019-02-26 17:59:46 INFO ExternalAppendOnlyMap:54 - Thread 34 spilling in-memory map of 97.5 MB to disk (12 times so far)
2019-02-26 18:00:13 INFO AbstractHadoopJob:511 - KylinConfig cached for : kylin_metadata@hdfs,path=hdfs://apachai1.apm.local:8020/kylin/kylin_metadata/kylin-5774d00a-bd56-ac28-e867-f9f5cb5d24f3/Test_Cube_2_clone/metadata
2019-02-26 18:00:13 INFO SparkFactDistinct:707 - Partition 19 handling column DEFAULT.SIDA_CASHIER_1.CASHIER_NAME, buildDictInReducer=true
2019-02-26 18:00:13 INFO SparkFactDistinct:716 - Received value: Николенко Наталья Николае

Step finished succesfully.

[asfgit]

Can one of the admins verify this patch?

[shaofengshi]

LGTM