When we have tables with orphan regions, SHC raises the following exception:
When ingesting data (with parameter newTable), the HBaseRelation class runs the method createTableIfNotExists. This method uses the HBaseAdmin isTableAvailable method to check if table is "available". However, as this method returnstrueonly if all table regions are available, it will return false in the case of table having problematic (e.g., orphan) regions, triggering the createTable method and after the Hbase prepareCreate procedure, which in turn raises the TableExistsException.
Summary
When we have tables with orphan regions, SHC raises the following exception:
When ingesting data (with parameter
newTable), the HBaseRelation class runs the methodcreateTableIfNotExists. This method uses the HBaseAdminisTableAvailablemethod to check if table is "available". However, as this method returnstrueonly if all table regions are available, it will returnfalsein the case of table having problematic (e.g., orphan) regions, triggering thecreateTablemethod and after the HbaseprepareCreateprocedure, which in turn raises theTableExistsException.Proposed solution
Check if table can be created using another method, such as
MetaTableAccessor.tableExistsdirectly, instead checking regions, which is performed byConnectionImplementationon HBase