Zhijie Shen created YARN-1835:
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Summary: History client service needs to be more robust
Key: YARN-1835
URL: https://issues.apache.org/jira/browse/YARN-1835
Project: Hadoop YARN
Issue Type: Bug
Reporter: Zhijie Shen
Assignee: Zhijie Shen
While doing the test, I've found the following issues so far:
1. The history file not found exception is exposed to the user directly, which
is better to be caught and translated into ApplicationNotFound.
2. NPE will be exposed as well, since ApplicationHistoryManager doesn't do
necessary null check.
In addition, TestApplicationHistoryManagerImpl missed to test most
ApplicationHistoryManager methods.
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