Shulou(Shulou.com)06/01 Report--

Idea: back up the hbase:namespace table hdfs data, delete the hbase:namespace table, let it rebuild at startup, and then bulkload the backed up data into the new hbase:namespace table.

Delete the row of hbase:namespace in hbase:meta, and mv back up the hdfs directory corresponding to the hbase:namespace table to the temporary directory, which is equivalent to deleting the hbase:namespace table.

Then, restart the hbase cluster, the namespace table will be rebuilt, and the cluster will finally get up. At this time, the only namespace saved in the hbase:namespace table is default, the default namespace. We use the bulkload command to move the hfile file in the temporary directory to the hbase:namespace table, thus restoring the namespace table.

two。 Repair the hbase table

It is not easy. The hbase cluster has been set up. Through web ui, it is found that the tables in it are empty, and the corresponding hdfs data file for each region cannot be found.

Because the hbase:meta table in hbase stores information such as the region allocation of all tables, now the hbase:meta table is destroyed due to the abnormal stop of the cluster, so the hbase:meta table should be corrupted, resulting in the hbase:namespace table unable to find the corresponding allocated region.

Idea: fix the hbase:meta table through .regioninfo

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