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fix#186fix#187
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Squashed commit of the following:
commit 4b8297f8d76b40f22e5419c72f0ddf1eadb3c7d9
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Mon May 20 19:36:34 2019 +0800
add log
commit 7b811f8a0ccb65fb0d0832ba1313e3c099f74dad
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Thu May 16 16:46:04 2019 +0800
add ut
commit 19f67fa8909c4a19f49fbe3b30a75d09c0736350
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Thu May 16 10:57:24 2019 +0800
fix ut
commit 7ad7c20f6536d3bbc9d789c71af238331a3e03c5
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Thu May 16 10:40:42 2019 +0800
fix ut
commit 9a114abb8be3083160ea01dab188333f675677e4
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Thu May 16 00:10:57 2019 +0800
mv cache validating in its own class
commit 0afba5a5ab7a005948acde545b4a68c8d26bfce9
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Wed May 15 11:47:42 2019 +0800
fix ut
commit eff3f41f91b4bfc2bfc84efc6af29fa4365d9dae
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Wed May 15 11:12:51 2019 +0800
add ut
commit 9bbbea78bcb8f5d409819628974628f0bf59f69c
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Tue May 14 23:17:00 2019 +0800
add ut
commit 0e0e59eedc055ddb6788a9dd6f07d4308772145d
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Tue May 14 19:39:09 2019 +0800
mv init time to spark session cache
commit a4a1c69e29ec7d5d51a0e5026cf8f3c2aaf6b2ef
Author: Kent Yao <yaooqinn@hotmail.com>
Date: Tue May 14 18:36:06 2019 +0800
Add a max cache time to clean SparkSessions that may have token expiry issue fix#186
* [KYUUBI-167]Handling ApplicationMaster token expiry to support long caching sparkcontext with dynamic executor allocation - fix#167
* fix ut
* add ut
* fix ut
* add doc
* fix https://github.com/apache/spark/pull/24120
* logger
* typo
* comment/dist jar
* fix ut
* typo
* fixes @116 Support long caching SparkSession/SparkContext for secured hadoop cluster
* handle sub classes of coarse grained scheduler backend
* fix ut for spark 2.2
* updating doc
