[SPARK-21732][SQL]Lazily init hive metastore client #18944
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cc @yhuai |
zsxwing
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Aug 15, 2017
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This test is in hive-thriftserver is because tests in the hive project use a shared singleton HiveContext and I cannot create a new one in the same project.
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lgtm |
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Test build #80651 has finished for PR 18944 at commit
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retest this please |
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Test build #80655 has finished for PR 18944 at commit
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Thanks! Merging to master. |
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Mar 2, 2018
… read and write data frames ## What changes were proposed in this pull request? apache#18944 added one patch, which allowed a spark session to be created when the hive metastore server is down. However, it did not allow running any commands with the spark session. This brings troubles to the user who only wants to read / write data frames without metastore setup. ## How was this patch tested? Added some unit tests to read and write data frames based on the original HiveMetastoreLazyInitializationSuite. Please review http://spark.apache.org/contributing.html before opening a pull request. Author: Feng Liu <[email protected]> Closes apache#20681 from liufengdb/completely-lazy.
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What changes were proposed in this pull request?
This PR changes the codes to lazily init hive metastore client so that we can create SparkSession without talking to the hive metastore sever.
It's pretty helpful when you set a hive metastore server but it's down. You can still start the Spark shell to debug.
How was this patch tested?
The new unit test.