[jira] [Assigned] (SENTRY-2342) Update schema version verification to support multi-version clusters share same DB

["Na Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SENTRY-2342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Na Li reassigned SENTRY-2342:
-----------------------------

    Assignee:     (was: Na Li)

> Update schema version verification to support multi-version clusters share same DB
> ----------------------------------------------------------------------------------
>
>                 Key: SENTRY-2342
>                 URL: https://issues.apache.org/jira/browse/SENTRY-2342
>             Project: Sentry
>          Issue Type: New Feature
>          Components: Sentry
>    Affects Versions: 2.1.0
>            Reporter: Na Li
>            Priority: Critical
>         Attachments: SENTRY-2342.001.patch, SENTRY-2342.001.patch
>
>
> Right now, sentry software has the schema version it supports hard-coded, and before starting its service, it gets schema version from DB and compare these two values. If they are not equal, exception will be thrown and sentry service won't start.
> To support sentry services with different versions that connect to the same DB at the same time, the schema version checking behavior has to be changed to allow sentry software with older version to work with DB with newer schema version.
> There are two places that verifies schema version
> 1) In SentrySchemaTool when schema is created in DB or upgraded in DB.  The schema verification should be strict, i.e., ensure the Sentry Server version is exactly the same as the DB schema version.
> 2) SentryStore when Sentry service is started after creating schema or upgrading schema in DB. The schema verification should be loose, i.e., ensure the Sentry Server schema version is compatible with the DB schema version.
> When checking compatible in isSchemaVersionCompatible, 
> 1) If DB version is based on schema version used by Sentry Server (DB version string starts with Sentry Server schema version), then it is compatible with Sentry server
> 2) DB version is shorter than the schema version used by Sentry Server, not compatible
> 3) major version number not equal, not compatible
> 4) sentry server has same major version but newer minor version than DB, not compatible.
> 5) sentry server has same major version but equal or smaller minor version than DB, compatible.
> The call stack when schema verification fails in SentryStore. 
> {code}
> Exception in thread "main" java.lang.IllegalStateException: Could not create org.apache.sentry.provider.db.service.persistent.SentryStore
> 	at org.apache.sentry.service.thrift.SentryService.getSentryStore(SentryService.java:210)
> 	at org.apache.sentry.service.thrift.SentryService.<init>(SentryService.java:168)
> 	at org.apache.sentry.service.thrift.SentryService$CommandImpl.run(SentryService.java:601)
> 	at org.apache.sentry.SentryMain.main(SentryMain.java:117)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:498)
> 	at org.apache.hadoop.util.RunJar.run(RunJar.java:226)
> 	at org.apache.hadoop.util.RunJar.main(RunJar.java:141)
> Caused by: java.lang.reflect.InvocationTargetException
> 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
> 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> 	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> 	at org.apache.sentry.service.thrift.SentryService.getSentryStore(SentryService.java:194)
> 	... 9 more
> Caused by: org.apache.sentry.provider.db.SentryAccessDeniedException: The Sentry store schema version <DB_version> is different from distribution version <Sentry_Server_Version>
> 	at org.apache.sentry.provider.db.service.persistent.SentryStore.verifySentryStoreSchema(SentryStore.java:280)
> 	at org.apache.sentry.provider.db.service.persistent.SentryStore.<init>(SentryStore.java:253)
> 	... 14 more
> {code}



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)