msck repair table hive not workingévaluation 6eme sur le livre de la jungle

The following query creates a table named employee using the above data. MSCK REPAIR TABLE 命令主要是用来解决通过hdfs dfs -put或者hdfs api写入hive分区表的数据在hive中无法被查询到的问题。. ALTER TABLE ADD PARTITION in Hive. Issue Links. |_day=5. Set the property hive.msck.path.validation=ignore or to the value of 'skip' at the cluster level. 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 . The text was updated successfully, but these errors were encountered: ️ 3 The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not present in the metastore. Hi All, We are running BDM/DEI mapping in blaze engine (10.4.1 version). Thread Thread Thread Thread Thread Thread Thread-208]: reexec.ReOptimizePlugin (:()) - ReOptimization: retryPossible: false Thread-208]: hooks.HiveProtoLoggingHook . You may want to move a set of Hive tables within the same cluster . When you use the AWS Glue Data Catalog with Athena, the IAM policy must allow the glue:BatchCreatePartition action. We are also working on delivering an EBF to allow passing Hive properties to Blaze through the Hive connection string. Step 5. user@sandbox:~$ hive --hiveconf hive.msck.path.validation=ignore hive> use mydatabase; hive> msck repair table mytable; Explore the Community. HIVE-14798 MSCK REPAIR TABLE throws null pointer exception. All of the answers so far are half right. |. Removes the file entries from the transaction log of a Delta table that can no longer be found in the underlying file system. The name must not include a temporal specification . Resolved; Activity. However, it expects the partitioned field name to be included in the folder structure: year=2015. In other words, it will add any partitions that exist on HDFS but not in metastore to the metastore. The default value of the property is zero, it means it will execute all the partitions at once. Ans 2: For an unpartitioned table, all the data of the table will be stored in a single directory/folder in HDFS. Click the Performance category. Querying hive metastore tables can provide more in depth details on the tables sitting in Hive. Answer (1 of 3): A2A. However if I alter table tablename / add partition > (key=value) then it works. table_name. Create a shell script on the emr and run it every e.g. 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. Alter table statement is used to change the table structure or properties of an existing table in Hive. External table files can be accessed and managed by processes outside of Hive. It looks like everything is working fine, but the problem exists. 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 When there is a large number of untracked partitions, there is a provision to run MSCK REPAIR TABLE batch wise to avoid OOME. |. Learn more . 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. Let's create a Hive table using the following command: hive> use test_db; OK Time taken: 0.029 seconds hive> create external table `parquet_merge` (id bigint, attr0 string) partitioned by (`partition-date` string) stored as parquet location 'data'; OK Time taken: 0.144 seconds hive> MSCK REPAIR TABLE `parquet_merge`; OK Partitions not in . The data is parsed only when you run the query. This task assumes you created a partitioned external table named emp_part that stores partitions outside the warehouse. |_month=3. Cloudera Community; Announcements; Community . Notice the partition name prefixed with the partition. 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. 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). hive - msck repair table query not working - Stack Overflow msck repair table query not working 1 I have stored partitioned data in s3 in hive format like this. January 14, 2022. Hive stores a list of partitions for each table in its metastore. Hive; HIVE-13703 "msck repair" on table with non-partition subdirectories reporting partitions not in metastore. The MSCK REPAIR TABLE command was designed to manually add partitions that are added to or removed from the file system, but are not present in the Hive metastore. Avoid having any partition key that contains any special characters. 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 . Assignee: Unassigned Reporter: Per Ullberg Votes: Click to see full answer. Hive configuration properties 30 minutes with the hive command MSCK repair table [tablename]. Is there a way we can reduce this time or can improve the performance ?. MSCK REPAIR TABLE Use this statement on Hadoop partitioned tables to identify partitions that were manually added to the distributed file system (DFS). Then come Jan 1st just repeat. This command saves a lot of time as we do not need to add each partition manually. Create empty partitions on hive till e.g. By giving the configured batch size for the property hive.msck.repair.batch.size it can run in the batches internally. ; Use Hive for this step of the mapping. Q&A for work. You remove one of the partition directories on the file system. If new partitions are present in the S3 location that you specified when Related Tags The DML statement define as INSERT statement, it involves metadata that must be have nodes, and is also damage the SYNC_DDL query option. Connect and share knowledge within a single location that is structured and easy to search. All processing and loading is taking less time around (10mins). External tables can access data stored in sources such as Azure Storage Volumes (ASV) or remote HDFS locations. Identifies an existing Delta table. 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). We can MSCK REPAIR command. The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not present in the metastore. MSCK REPAIR TABLE 命令是做啥的. 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= 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= duplicates. Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. See HIVE-874 and HIVE-17824 for more details. Query successful. Querying hive metastore tables can provide more in depth details on the tables sitting in Hive. Also Keep in mind that Hive is a big data warehouse. This would provide the same functionality as Hive's MSCK REPAIR TABLE. Reopen Issue. External Tables with Custom Directory Schemes. If, however, new partitions are directly added to HDFS (say by using hadoop fs -put command) or removed from HDFS . Syntax MSCK REPAIR TABLE table-name Description table-name The name of the table that has been updated. . would anyone here have any pointers or suggestions to figure out what's going wrong? That bug link won't work unless one is a HW employee or contractor. HIVE-17824 是关于hive msck repair 增加清理metastore中已经不在hdfs上的分区信息 it works for me all the time. This is necessary. This can happen when these files have been manually deleted. Run the distcp command to perform the data copy. In the Hive service page, click the Configuration tab. An external table is generally used when data is located outside the Hive. HiveMetaStoreChecker throws NullPointerException when doing a MSCK REPAIR TABLE. In the Cloudera Manager Admin Console, go to the Hive service. 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. This task assumes you created a partitioned external table named emp_part that stores partitions outside the warehouse. Hive stores a list of partitions for each table in its metastore. The default value of the property is zero, it means it will execute all the . When you drop a 'Managed' table hive will also trash its data. msck repair table wont work if you have data in the . (. 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). Explains how to move a Hive table from one metastore to another―either within the same cluster, or from one cluster to a different cluster. hive -hiveconf a=b To list all effective configurations on Hive shell, use the following command: hive> set; For example, use the following command to start Hive shell with debug logging enabled on the console: hive -hiveconf hive.root.logger=ALL,console Additional reading. hive> msck repair table meter_001; OK . In addition, we can use the Alter table add partition command to add the new partitions for a table. would anyone here have any pointers or suggestions to figure out what's going wrong? 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 . If your table has partitions, you need to load these partitions to be able to query data. Just performing an ALTER TABLE DROP PARTITION statement does remove the partition information from the metastore only. Проблема в том, что после каждого прогона моего Spark batch, вновь сгенерированные данные хранящиеся в S3 не будут обнаружены Athena, если только я вручную не запущу запрос MSCK REPAIR TABLE. Highly un-elegeant. This statement does not apply to Delta Lake tables. If the structure or partitioning of an external table is changed, an MSCK REPAIR TABLE table_name statement can be used to refresh metadata information. Let us create an external table using the keyword "EXTERNAL" with the below command. By the way, fixing this problem (by recreating the table with the partition order in the correct way) let msck repair to work correctly. Update Stats Recover Partitions (MSCK REPAIR TABLE) Hive stores a list of partitions for each table in its metastore. Let us see it in action. 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. 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. Bye Omar spark-sql -e "msck repair table <tablename>". hive> create external table foo (a int) partitioned by (date_key bigint) location 'hdfs:/tmp/foo'; OK Time taken: 3.359 seconds hive> msck repair table foo; FAILED: Execution Error, return . 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. At the moment I don't know what caused the inversion, I asked the dev team and they also don't know. This can happen when these files have been manually deleted. Time taken: 22.039 seconds, Fetched: 1277 row(s) hive>. However this is more cumbersome than msck > repair table. This article is a collection of queries that probes Hive metastore configured with mysql to get details like list of transactional tables, etc. . Sounds like magic is not it? Review the IAM policies attached to the user or role that you're using to run MSCK REPAIR TABLE. msck repair table is used to add partitions that exist in HDFS but not in the hive metastore. Log work Agile Board Rank to Top Rank to Bottom Voters Watch issue Watchers Create sub-task Convert to sub-task Move Link Clone Labels . "ignore" will try to create partitions anyway (old behavior). Assign More. Learn more. 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 robin@hive_server:~$ hive --hiveconf hive.msck.path.validation=ignore hive> use mydatabase; OK Time taken: 1.084 seconds hive> msck repair table mytable; OK Partitions not in metastore: mytable:location=00S mytable:location=03S . Repair: Added partition to metastore mytable:location=03S. 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. On the Configuration page, click the HiveServer2 scope. This caused the msck repair command to fail, only aligning metastore data to the latter partition type. thanks, Stephen. This may or may not work. 'DEBUG' but yet i still am not seeing any smoking gun. export count1=$(beeline -u . 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. Export. Notice the partition name prefixed with the partition. 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. the end of the year and run MSCK repair table [tablename] ahead of time to get hive to recognize all partitions till the end of the year. The time spent in msck repair table is proportional to the number of partitions. You can either load all partitions or load them individually. If you use the load all partitions (MSCK REPAIR TABLE) command, partitions must be in a format understood by Hive. If your table has defined partitions, the partitions might not yet be loaded into the AWS Glue Data Catalog or the internal Athena data catalog. Comment. Usage msck repair table wont work if you have data in the . Edit. thanks, Stephen. Removes the file entries from the transaction log of a Delta table that can no longer be found in the underlying file system. For some > reason this particular source will not pick up added partitions with > msck repair table. ( Does not work on windows ) . Athena creates metadata only when a table is created. When I write parquet with custom partitioning like this: . By giving the configured batch size for the property hive.msck.repair.batch.size it can run in the batches internally. If the policy doesn't allow that action, then Athena can't add partitions to the metastore. If you go over 500 partitions, it will still work, but it'll take more time. Use MSCK REPAIR TABLE or ALTER TABLE ADD PARTITION to load the partition information into the catalog. Syntax FSCK REPAIR TABLE table_name [DRY RUN] Parameters. |. . I think I need to refresh the partition info in the Hive Metastore. This statement (a Hive command) adds metadata about the partitions to the Hive catalogs. This could be one of the reasons, when you created the table as external table, the MSCK REPAIR worked as expected. CREATE EXTERNAL TABLE if not exists students. MSCK REPAIR TABLE - Refresh metadata information. hive> CREATE TABLE IF NOT EXISTS employee ( eid int, name String, salary String, destination String) COMMENT 'Employee details' ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' LINES TERMINATED BY '\n' STORED AS TEXTFILE; If you add the option IF NOT EXISTS, Hive . CREATE TABLE schema_name.table_name (column1 decimal(10,0), column2 int, column3 date) PARTITIONED BY(column7 date) ST. For partitions that are not Hive compatible, use ALTER TABLE ADD PARTITION to load the partitions so that you can query the data. 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 MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not present in the metastore. This is necessary. 'DEBUG' but yet i still am not seeing any smoking gun. If the structure or partitioning of an external table is changed, an MSCK REPAIR TABLE table_name statement can be used to refresh metadata information. |_month=3. 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;. In this article: Syntax. Create and work with one single Hive table which overarches on a HDFS folder constituting files of various structures. . But MSCK REPAIR TABLE command in the end is taking almost 40 minutes. External tables can access data stored in sources such as Azure Storage Volumes (ASV) or remote HDFS locations. More. External table files can be accessed and managed by processes outside of Hive. Parameters. However, it expects the partitioned field name to be included in the folder structure: year=2015. |. hive> create external table foo (a int) partitioned by (date_key bigint) location 'hdfs:/tmp/foo'; OK Time taken: 3.359 seconds hive> msck repair table foo; FAILED: Execution Error, return . 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. 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. Using partitions, we can query the portion of the data. By giving the configured batch size for the property hive.msck.repair.batch.size it can run in the batches internally. Roll_id Int, Class Int, Name String, Rank Int) Row format delimited fields terminated by ','. (PS: Querying by Hive will not work. > > Is there an alternative that works like msck repair table that will > pick up the additional partitions? Repair the target table. Step 4. 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. Search for Load Dynamic Partitions Thread Count and enter the value you want to set as a service-wide default. |_day=5. FSCK REPAIR TABLE. People. This article is a collection of queries that probes Hive metastore configured with mysql to get details like list of transactional tables, etc. I am creating hive table in Google Cloud Bucket using below SQL statement. 我们知道hive有个服务叫metastore，这个服务主要是存储一些元数据信息，比如数据库名，表名或者表的分区等等信息 . Use hive.msck.path.validation setting on the client to alter this behavior; "skip" will simply skip the directories. MSCK REPAIR TABLEcompares the partitions in the table metadata and the partitions in S3. msck repair table is used to add partitions that exist in HDFS but not in the hive metastore. Just one correction: With Hive CLI, the MSCK REPAIR TABLE did not auto-detect partitions for the Delta table but it did auto-detect the partitions for the manifest . /bucket/year=2017/month=02/date=20 /bucket/year=2017/month=02/date=21 I have created an external table in Athena More.