Removes the file entries from the transaction log of a Delta table that can no longer be found in the underlying file system. The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not present in the metastore. When there is a large number of untracked partitions, there is a provision to run MSCK REPAIR TABLE batch wise to avoid OOME (Out of Memory Error). We can MSCK REPAIR command. Internal tables are useful if you want Hive to manage the complete lifecycle of your data including the deletion, whereas external tables are useful when the files are being used outside of Hive. Resolved; Activity. An Error Is Reported When msck repair table table_name Is Run on Hive ... In addition, we can use the Alter table add partition command to add the new partitions for a table. Troubleshooting Apache Hive in CDH | 6.1.x | Cloudera Documentation Repair the target table. Querying hive metastore tables can provide more in depth details on the tables sitting in Hive. spark-sql -e "msck repair table <tablename>". Just performing an ALTER TABLE DROP PARTITION statement does remove the partition information from the metastore only. However, if the partitioned table is created from existing data, partitions are not registered automatically in the Hive metastore; you must run MSCK REPAIR TABLE to register the partitions. MSCK REPAIR TABLE taking more time "ignore" will try to create partitions anyway (old behavior). Solved: msck repair table bad behaviour - Cloudera Community In other words, it will add any partitions that exist on HDFS but not in metastore to the metastore. If new partitions are present in the S3 location that you specified when table_name. Answer (1 of 3): A2A. CREATE TABLE schema_name.table_name (column1 decimal(10,0), column2 int, column3 date) PARTITIONED BY(column7 date) ST. Also Keep in mind that Hive is a big data warehouse. See HIVE-874 and HIVE-17824 for more details. Can we add partition existing table in hive? - AskingLot.com Notice the partition name prefixed with the partition. When msck repair table table_name is run on Hive, the error message "FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask (state=08S01,code= It can be useful if you lose the data in your Hive metastore or if you are working in a cloud environment without a persistent metastore. MSCK REPAIR TABLEcompares the partitions in the table metadata and the partitions in S3. If, however, new partitions are directly added to HDFS (say by using hadoop fs -put command) or removed from HDFS . Ensure the table is set to external, drop all partitions then run the table repair: alter table mytable_name set TBLPROPERTIES('EXTERNAL'='TRUE') alter table mytable_name drop if exists partition (`mypart_name` <> 'null'); msck repair table mytable_name; If msck repair throws an error, then run hive from the terminal as: hive --hiveconf hive . Use MSCK REPAIR TABLE or ALTER TABLE ADD PARTITION to load the partition information into the catalog. Using partitions, we can query the portion of the data. To fix this issue, you can run the following hive query before the "INSERT OVERWRITE" to recover the missing partition definitions: MSCK REPAIR TABLE partition_test; OK Partitions not in metastore: partition_test:p=p1 Repair: Added partition to metastore partition_test:p=p1 Time taken: 0.486 seconds, Fetched: 2 row (s) Hadoop | Hive.
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