Symptoms

Assume that you have a database that contains a partitioned table in Microsoft SQL Server 2014. The table has a columnstore index, and the partitions of the table are mapped to different filegroups. When you run the DBCC CHECKFILEGROUP statement, you receive the following false inconsistency error messages:

Msg 8965, Level 16, State 1
Table error: Object ID <object id>, index ID <index id>, partition ID <partition id>, alloc unit ID <alloc unit id> (type LOB data). The off-row data node at page (<page id>), slot <slot id>, text ID <text id> is referenced by page (<page id>), slot <slot id>, but was not seen in the scan.CHECKFILEGROUP found 0 allocation errors and N consistency errors in table 'PageArchive' (object ID <object id>).

However, when you run the DBCC CHECKDB statement, you don't receive any consistency error messages. Additionally, running the DBCC CHECKDB statement with the REPAIR_ALLOW_DATA_LOSS option doesn't fix the consistency errors. That's because the consistency error that's reported by DBCC CHECKFILEGROUP is a false positive and a reporting bug that can be ignored.

Resolution

The issue was first fixed in the following cumulative updates of SQL Server:

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. We recommend that you download and install the latest cumulative updates for SQL Server:


Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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