【问题描述】

        EsgynDB(trafodion)数据库在做备份import时提示：Backup location is invalid，错误信息如下：

SQL>import backup from location 'hdfs://172.31.234.16:8020/tmp/fulldb12parallel',tag 'full1133';
*** ERROR[5050] IMPORT BACKUP command could not be completed. Reason: Error returned from exportOrImportBackup method. See next error for details. [2019-07-04 11:33:34]
*** ERROR[8448] Unable to access Hbase interface. Call to ExpHbaseInterface::exportOrImportBackup returned error HBASE_EXPORT_IMPORT_BACKUP_ERROR(727). Cause: java.io.IOException: java.io.IOException: Backup location is invalid
org.apache.hadoop.hbase.pit.BackupRestoreClient.importBackup(BackupRestoreClient.java:4488)
org.apache.hadoop.hbase.pit.BackupRestoreClient.exportOrImportBackup(BackupRestoreClient.java:4517) Caused by
java.io.IOException: Backup location is invalid
org.apache.hadoop.hbase.pit.BackupRestoreClient.importBackup(BackupRestoreClient.java:4396)
org.apache.hadoop.hbase.pit.BackupRestoreClient.exportOrImportBackup(BackupRestoreClient.java:4517). [2019-07-04 11:33:34]

【问题原因】

        Backup location is invalid意思是备份目录不存在，于是查看hdfs://172.31.234.16:8020/tmp/fulldb12parallel是否存在，发现此目录存在，其下面的子目录名称为"full20190702_00212428826064850102"

[trafodion@cs02 ~]$ hadoop fs -ls hdfs://172.31.234.16:8020/tmp/fulldb12parallel
Found 1 items
drwxrwxrwt   - trafodion supergroup          0 2019-07-03 18:12 hdfs://172.31.234.16:8020/tmp/fulldb12parallel/full20190702_00212428826064850102

【问题解决】

        由于import中的tag名称需要与备份集的目录名称保持一致，所以把上述import命令中的tag修改为full20190702_00212428826064850102即可。；

SQL>import backup from location 'hdfs://172.31.234.16:8020/tmp/fulldb12parallel',tag 'full20190702_00212428826064850102';