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Elgato_dark/zeppelin

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ZEPPELIN-3051. Support Interpreter Process Recovery ### What is this PR for? This PR is for the purpose of recover running interpreter process when zeppelin server is restarted. This would be useful when restarting zeppelin without interrupt current running interpreter processes, should be useful when admin do maintenance or upgrading. Interface `RecoveryStorage` is used for storing the information of running interpreter process. Currently it only has one implementation `FileSystemRecoveryStorage`, other implementation could be done later (such as zookeeper based). `InterpreterLauncher` is the component where to recover the running interpreter process. Test: * RecoveryTest.java * FileSystemRecoveryStorageTest.java Design Doc: https://docs.google.com/document/d/1Plm3Hd40aGdNaXmjdsoY4ek3f-gTijTMGMkNjAZN39Y/edit?usp=sharing ### What type of PR is it? [Feature] ### Todos * [ ] - Task ### What is the Jira issue? * https://issues.apache.org/jira/browse/ZEPPELIN-3051 ### How should this be tested? Unit test & Integration Test is added. Also manually verified. ### Screenshots (if appropriate) ### Questions: * Does the licenses files need update? No * Is there breaking changes for older versions? No * Does this needs documentation? No Author: Jeff Zhang <zjffdu@apache.org> Closes #2668 from zjffdu/ZEPPELIN-3051 and squashes the following commits: a4c9b9c [Jeff Zhang] address comments 575b7b9 [Jeff Zhang] fix the pid of interpreter process id 02b118f [Jeff Zhang] address comments da7cbb9 [Jeff Zhang] ZEPPELIN-3051. Support Interpreter Process Recovery

2017-12-05 08:27:12 +00:00

2CZA1DVUG:shared_process 192.168.3.2:55410