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From "liyang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KYLIN-3059) Query got IllegalArgumentException
Date Fri, 01 Dec 2017 06:42:00 GMT

    [ https://issues.apache.org/jira/browse/KYLIN-3059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16274017#comment-16274017
] 

liyang commented on KYLIN-3059:
-------------------------------

Thanks for the good report. From this and a few related reports, we have identified that the
metadata cache mechanism can corrupt in certain concurrency scenarios. Will attempt a fix
soon.

> Query got IllegalArgumentException
> ----------------------------------
>
>                 Key: KYLIN-3059
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3059
>             Project: Kylin
>          Issue Type: Bug
>          Components: Query Engine
>    Affects Versions: v1.6.0
>         Environment: apache-kylin-1.6.0-hbase1.x
> apache hadoop 2.7.2
> hbase-1.2.4
>            Reporter: Xingxing Di
>            Assignee: liyang
>         Attachments: query.log
>
>
> A query got an exception , the error trace was :
> {code:java}
> Caused by: java.lang.IllegalArgumentException
>         at com.google.common.base.Preconditions.checkArgument(Preconditions.java:76)
>         at org.apache.kylin.metadata.model.TblColRef.<init>(TblColRef.java:105)
>         at org.apache.kylin.metadata.model.TblColRef.columnForUnknownModel(TblColRef.java:74)
>         at org.apache.kylin.query.relnode.OLAPTableScan.buildColumnRowType(OLAPTableScan.java:231)
> {code}
> the code is : 
> {code:java}
>     TblColRef(TableRef table, ColumnDesc column) {
>         checkArgument(table.getTableDesc() == column.getTable()); // this line cause
exception
>         this.table = table;
>         this.column = column;
>     } 
> {code}
> and after we did "Reload metadata", query executed successful.
> I dont know what will cause this exception,  i think it may related to ProjectL2Cache
or ProjectManager.



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