Warren Zhu

[LIVY-853][BUILD] Update travis.yml use latest pip and setuptools to fix build

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## What changes were proposed in this pull request? Build https://travis-ci.com/github/apache/incubator-livy/jobs/498541463 failed due to tests_require in setup.py even for no related change. Stacktrace as below: ``` Couldn't find index page...

[LIVY-854] Add exceptions in BatchSessionView

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## What changes were proposed in this pull request? Add exceptions filed in BatchSessionView ## How was this patch tested? Manually tested

[SPARK-40381][DEPLOY] Support standalone worker recommission

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### What changes were proposed in this pull request? Support standalone worker recommission from master rest api ### Why are the changes needed? Support standalone worker recommission is neeeded. ###...

[SPARK-40481][CORE] Ignore stage fetch failure caused by decommissioned executor

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### What changes were proposed in this pull request? Add a config `spark.stage.ignoreDecommissionFetchFailure` to control whether ignore stage fetch failure caused by decommissioned executor when count `spark.stage.maxConsecutiveAttempts` Executor is considered...

[SPARK-33274][SS] Stop query in cp mode when total cores less than total kafka partition

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What changes were proposed in this pull request? Add check for total executor cores when SetReaderPartitions message received. Why are the changes needed? In continuous processing mode, EpochCoordinator won't add...

[SPARK-40267][DOC] Add description for ExecutorAllocationManager metrics

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### What changes were proposed in this pull request? Add description for ExecutorAllocationManager metrics ### Why are the changes needed? Some ExecutorAllocationManager metrics are hard to know what stands for...

Add renew slots min interval in cluster to avoid renew slots too frequently when maxAttempts is small

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This is related to #1439. When master node is down and cluster recover by promoting a slave, the Jedis cluster will need as long as connection.timeout * (maxAttempt + 1)...

It's hard to install node-gyp correctly. Could we have a docker version?