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Posted to issues@kylin.apache.org by "Wang Cheng (JIRA)" <ji...@apache.org> on 2017/02/24 02:14:45 UTC
[jira] [Updated] (KYLIN-2464) Leveraging interface declaration to
avoid runtime errors
[ https://issues.apache.org/jira/browse/KYLIN-2464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wang Cheng updated KYLIN-2464:
------------------------------
Summary: Leveraging interface declaration to avoid runtime errors (was: Leveraging interface declare to avoid runtime errors)
> Leveraging interface declaration to avoid runtime errors
> --------------------------------------------------------
>
> Key: KYLIN-2464
> URL: https://issues.apache.org/jira/browse/KYLIN-2464
> Project: Kylin
> Issue Type: Bug
> Reporter: Wang Cheng
> Priority: Minor
>
> There are some runtime errors happened when code is compiled with high Java version and runs on low Java version, for example:
> Exception in thread "main" java.lang.NoSuchMethodError: java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;
> at org.apache.kylin.cube.CubeManager.getInstance(SourceFile:110)
> at org.apache.kylin.tool.CubeMigrationCheckCLI.checkCube(CubeMigrationCheckCLI.java:141)
> at org.apache.kylin.tool.CubeMigrationCheckCLI.execute(CubeMigrationCheckCLI.java:121)
> at org.apache.kylin.tool.CubeMigrationCLI.checkMigrationSuccess(CubeMigrationCLI.java:170)
> at org.apache.kylin.tool.CubeMigrationCLI.moveCube(CubeMigrationCLI.java:156)
> at org.apache.kylin.tool.CubeMigrationCLI.moveCube(CubeMigrationCLI.java:165)
> at io.kyligence.kap.tool.release.KapReleaseCLI.main(KapReleaseCLI.java:66)
> It's a better idea that declaring a variable to be an interface.
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