Assignee: Unassigned Reporter: Per Ullberg Votes: That bug link won't work unless one is a HW employee or contractor. Add Hive procedure to recover (discover) partitions #174 Cloudera Community; Announcements; Community . Hive分区修复命令MSCK介绍与使用 - 过往记忆 Repair partitions using MSCK repair - Cloudera Tuning Apache Hive Performance on the Amazon S3 Filesystem in CDH | 6.2 ... Solved: msck repair table bad behaviour - Cloudera Community If you run in Hive execution mode you would need to pass on the following property hive.msck.path.validation=skip If you are running your mapping with Blaze then you need to pass on this property within the Hive connection string as blaze operates directly on the data and does not load the hive client properties. After you create a table with partitions, run a subsequent query that consists of the MSCK REPAIR TABLE clause to refresh partition metadata, for example, MSCK REPAIR TABLE cloudfront_logs;. The MSCK REPAIR TABLE command was designed to manually add partitions that are added to or removed from the file system, such as HDFS or S3, but are not present in the metastore. If new partitions are present in the S3 location that you specified when External tables can access data stored in sources such as Azure Storage Volumes (ASV) or remote HDFS locations. [HIVE-13703] "msck repair" on table with non-partition subdirectories ... Notice the partition name prefixed with the partition. How-to: Ingest and Query "Fast Data" with Impala (Without Kudu) Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. However, it expects the partitioned field name to be included in the folder structure: year=2015. Bye Omar 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. The default value of the property is zero, it means it will execute all the . Assign More. Re: adding parquet partitions to external table (msck repair table not ... msck repair table wont work if you have data in the . hive> Msck repair table <db_name>.<table_name> which will add metadata about partitions to the Hive metastore for partitions for which such metadata doesn't already exist. This goes to the directory where the table is pointing to and then creates a tree of directories and subdirectories, check table metadata, and adds all missing partitions. 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= Hive - Create Table - Tutorialspoint If you use the load all partitions (MSCK REPAIR TABLE) command, partitions must be in a format understood by Hive. MSCK REPAIR TABLE 命令是做啥的. This article is a collection of queries that probes Hive metastore configured with mysql to get details like list of transactional tables, etc. Removes the file entries from the transaction log of a Delta table that can no longer be found in the underlying file system. Learn more. 30 minutes with the hive command MSCK repair table [tablename]. This command saves a lot of time as we do not need to add each partition manually. Hive stores a list of partitions for each table in its metastore. External tables can access data stored in sources such as Azure Storage Volumes (ASV) or remote HDFS locations. If, however, new partitions are directly added to HDFS (say by using hadoop fs -put command) or removed from HDFS . Run the distcp command to perform the data copy. But MSCK REPAIR TABLE command in the end is taking almost 40 minutes. Then come Jan 1st just repeat. The data is parsed only when you run the query. If you go over 500 partitions, it will still work, but it'll take more time. HiveMetaStoreChecker throws NullPointerException when doing a MSCK REPAIR TABLE. The default value of the property is zero, it means it will execute all the partitions at once. Also Keep in mind that Hive is a big data warehouse. msck repair table and hive v2.1.0 - narkive 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). Is there a way we can reduce this time or can improve the performance ?. [HIVE-24200] MSCK repair table is not working - ASF JIRA You remove one of the partition directories on the file system. Even though this Symlink stuff is hive thing, it works with Hive only if the data files are in text format, not parquet like it is here). repair partition on hive transactional table is not working Anup Tiwari; Re: repair partition on hive transactional table is not w. Anup Tiwari; Re: repair partition on hive transactional table is n. Anup Tiwari This was a spike/investigation/research in my work with our current client (a bank), which is to compact HDFS (orc) files which would be persisted through a data ingestion service written in Spark streaming. What is DDL statement in hive - Interview Questions spark-sql -e "msck repair table <tablename>". Resolve issues with Amazon Athena queries returning empty results MSCK REPAIR TABLE taking more time The name must not include a temporal specification . So I run MSCK REPAIR TABLE default.person but it fails with this error: Error: java.lang.NoSuchMethodException: org.apache.hadoop.hive.ql.metadata.Hive . MSCK REPAIR HIVE EXTERNAL TABLES - Cloudera Community - 229066 By giving the configured batch size for the property hive.msck.repair.batch.size it can run in the batches internally. This article is a collection of queries that probes Hive metastore configured with mysql to get details like list of transactional tables, etc. This task assumes you created a partitioned external table named emp_part that stores partitions outside the warehouse. Can we add partition existing table in hive? - AskingLot.com |. That is, all the data in the files still exists on the file system, it's jut that Hive no longer knows that it's . Repair: Added partition to metastore mytable:location=03S. CREATE TABLE schema_name.table_name (column1 decimal(10,0), column2 int, column3 date) PARTITIONED BY(column7 date) ST. MSCK REPAIR TABLEcompares the partitions in the table metadata and the partitions in S3. user@sandbox:~$ hive --hiveconf hive.msck.path.validation=ignore hive> use mydatabase; hive> msck repair table mytable; Explore the Community. Click to see full answer. Blaze mapping fails with "java.lang.RuntimeException: Failure to ... In other words, it will add any partitions that exist on HDFS but not in metastore to the metastore. The landing table only has one day's worth of data and shouldn't have more than ~500 partitions, so msck repair table should complete in a few seconds. 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. would anyone here have any pointers or suggestions to figure out what's going wrong? Load data from Cassandra to HDFS parquet files and select with Hive repair partition on hive transactional table is not working In the Hive service page, click the Configuration tab. The MSCK REPAIR TABLEcommand scans a file system such as Amazon S3 for Hive compatible partitions that were added to the file system after the table was created. Error executing MSCK REPAIR TABLE on external Hive table (Hive 2.3.6) bigdata Archives - adhocshare How to run hive query in shell script and store the results in variable ... Thread Thread Thread Thread Thread Thread Thread-208]: reexec.ReOptimizePlugin (:()) - ReOptimization: retryPossible: false Thread-208]: hooks.HiveProtoLoggingHook . Hive MSCK repair - Cloudera Community - 245173 HIVE partitions adding not working as expected..pa ... - Cloudera Removes the file entries from the transaction log of a Delta table that can no longer be found in the underlying file system. (PS: Querying by Hive will not work. 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. Avoid having any partition key that contains any special characters. Update Stats . /bucket/year=2017/month=02/date=20 /bucket/year=2017/month=02/date=21 I have created an external table in Athena All of the answers so far are half right. Using partitions, we can query the portion of the data. msck repair table wont work if you have data in the . repair partition on hive transactional table is not working msck repair table for custom partition names "ignore" will try to create partitions anyway (old behavior). How to update partition metadata in Hive , when partition data is ... Search for Load Dynamic Partitions Thread Count and enter the value you want to set as a service-wide default. Usage would anyone here have any pointers or suggestions to figure out what's going wrong? |_month=3. More. This is necessary. The text was updated successfully, but these errors were encountered: ️ 3 How to drop partition in external table in hive - Quora This would provide the same functionality as Hive's MSCK REPAIR TABLE. Sounds like magic is not it? msck repair table is used to add partitions that exist in HDFS but not in the hive metastore. Roll_id Int, Class Int, Name String, Rank Int) Row format delimited fields terminated by ','. The following query creates a table named employee using the above data. |_day=5. FSCK REPAIR TABLE | Databricks on AWS 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). Answer (1 of 3): You can follow the below steps: Case 1: Running the hive query via beeline & saving the output to a variable in shell.

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