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https://issues.apache.org/jira/browse/KYLIN-2373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15823122#comment-15823122
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chelubaiq commented on KYLIN-2373:
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the master code should have no such problems:
after loading hive table, SrcTableSyncListener#onEntityChange will
notifyProjectSchemaUpdate for projects using this table,
and DataModelSyncListener#onProjectSchemaChange will reloadDataModelDesc.
> kyin1.5.3, the exposed tables often disappear from the kylin Insight page.
> --------------------------------------------------------------------------
>
> Key: KYLIN-2373
> URL: https://issues.apache.org/jira/browse/KYLIN-2373
> Project: Kylin
> Issue Type: Bug
> Components: REST Service
> Affects Versions: v1.5.3
> Reporter: chelubaiq
> Assignee: Zhong,Jason
> Attachments: KYLIN-2373_v1.5.4.1-beeline.patch
>
>
> 1 environment:
> kylin1.5.3
> tow nodes: "query" server a and "all" server b,
> with config: kylin.rest.servers=a_ip,b_ip
> 2 problem:
> the exposed tables often disappear from the kylin Insight page.
> the log says:
> ERROR [http-bio-7070-exec-9] project.ProjectL2Cache:240 : Realization
> 'CUBE[name=custom_out_sales4]' reports column 'PROJECT1.TABLE1.COLUMN1', but
> it is not equal to 'ColumnDesc [name=COLUMN1,table=PROJECT1.TABLE1]'
> according to MetadataManager
> 3 one way to reproduce:
> in project1, cube1 is ready;
> in server a, choose project1, and reload one table from the DataSource of
> Model page, succeed; the table exist in Insight page.
> in server b, choose project1, refresh Insight page, no tables found: "No
> Result."
> if click "reload metadata" in the system page, tables will show up.
> 4
> reason of table not found in server b:
> in ProjectL2Cache, ColumnDesc from project realization is not equal to
> ColumnDesc from MetadataManager,
> because table.equals(other.table) is false in the ColumnDesc.equals()
> method,
> because table's lastModified not equal.
> and table's lastModified from MetadataManager > from project realization
> the bug may exist in CacheService.rebuildCache():
> case TABLE:
> getMetadataManager().reloadTableCache(cacheKey);
> CubeDescManager.clearCache();
> break;
> MetadataManager.reloadAllDataModel() may be also needed here.
> or MetadataManager.reloadDataModelDesc(forEachModelNameOfTheProject)
> or MetadataManager.clearCache()
> 5
> why table exist in server a's Insight page?
> according to 4, server a should also have same equality problem and should
> also disappear?
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