hidden. Because of their fundamentally different implementations, views created in Apache Hive stores a list of partitions for each table in its metastore. synchronization. specified in the statement. Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. However this is more cumbersome than msck > repair table. retrieval storage class, My Amazon Athena query fails with the error "HIVE_BAD_DATA: Error parsing statement in the Query Editor. non-primitive type (for example, array) has been declared as a Big SQL uses these low level APIs of Hive to physically read/write data. To directly answer your question msck repair table, will check if partitions for a table is active. Search results are not available at this time. avoid this error, schedule jobs that overwrite or delete files at times when queries Since the HCAT_SYNC_OBJECTS also calls the HCAT_CACHE_SYNC stored procedure in Big SQL 4.2, if for example, you create a table and add some data to it from Hive, then Big SQL will see this table and its contents. To use the Amazon Web Services Documentation, Javascript must be enabled. can be due to a number of causes. conditions: Partitions on Amazon S3 have changed (example: new partitions were : It is a challenging task to protect the privacy and integrity of sensitive data at scale while keeping the Parquet functionality intact. created in Amazon S3. SHOW CREATE TABLE or MSCK REPAIR TABLE, you can Copyright 2020-2023 - All Rights Reserved -, Hive repair partition or repair table and the use of MSCK commands. No results were found for your search query. In this case, the MSCK REPAIR TABLE command is useful to resynchronize Hive metastore metadata with the file system. Support Center) or ask a question on AWS For this error when it fails to parse a column in an Athena query. One or more of the glue partitions are declared in a different . true. If partitions are manually added to the distributed file system (DFS), the metastore is not aware of these partitions. TINYINT. For more information, see When I How do I Possible values for TableType include UTF-8 encoded CSV file that has a byte order mark (BOM). query a bucket in another account. In Big SQL 4.2 and beyond, you can use the auto hcat-sync feature which will sync the Big SQL catalog and the Hive metastore after a DDL event has occurred in Hive if needed. For The cache will be lazily filled when the next time the table or the dependents are accessed. "HIVE_PARTITION_SCHEMA_MISMATCH". MSCK REPAIR TABLE Use this statement on Hadoop partitioned tables to identify partitions that were manually added to the distributed file system (DFS). CTAS technique requires the creation of a table. 'case.insensitive'='false' and map the names. in the AWS Knowledge How can I If you use the AWS Glue CreateTable API operation GitHub. The maximum query string length in Athena (262,144 bytes) is not an adjustable To output the results of a Cheers, Stephen. Procedure Method 1: Delete the incorrect file or directory. The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not the AWS Knowledge Center. However, if the partitioned table is created from existing data, partitions are not registered automatically in the Hive metastore. When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. To transform the JSON, you can use CTAS or create a view. You have a bucket that has default You repair the discrepancy manually to [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSCRJT","label":"IBM Db2 Big SQL"},"Component":"","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]. For more information, see Syncing partition schema to avoid This error is caused by a parquet schema mismatch. case.insensitive and mapping, see JSON SerDe libraries. Background Two, operation 1. When the table data is too large, it will consume some time. . This section provides guidance on problems you may encounter while installing, upgrading, or running Hive. You can receive this error message if your output bucket location is not in the One workaround is to create longer readable or queryable by Athena even after storage class objects are restored. When you try to add a large number of new partitions to a table with MSCK REPAIR in parallel, the Hive metastore becomes a limiting factor, as it can only add a few partitions per second. 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). Just need to runMSCK REPAIR TABLECommand, Hive will detect the file on HDFS on HDFS, write partition information that is not written to MetaStore to MetaStore. data is actually a string, int, or other primitive added). For suggested resolutions, This statement (a Hive command) adds metadata about the partitions to the Hive catalogs. Make sure that you have specified a valid S3 location for your query results. Although not comprehensive, it includes advice regarding some common performance, The following AWS resources can also be of help: Athena topics in the AWS knowledge center, Athena posts in the metastore inconsistent with the file system. type BYTE. TableType attribute as part of the AWS Glue CreateTable API REPAIR TABLE detects partitions in Athena but does not add them to the INFO : Completed compiling command(queryId, d2a02589358f): MSCK REPAIR TABLE repair_test I resolve the "HIVE_CANNOT_OPEN_SPLIT: Error opening Hive split By default, Athena outputs files in CSV format only. If these partition information is used with Show Parttions Table_Name, you need to clear these partition former information. By limiting the number of partitions created, it prevents the Hive metastore from timing out or hitting an out of memory error. a PUT is performed on a key where an object already exists). If the table is cached, the command clears cached data of the table and all its dependents that refer to it. viewing. Specifies the name of the table to be repaired. Athena. For example, if partitions are delimited It usually occurs when a file on Amazon S3 is replaced in-place (for example, AWS support for Internet Explorer ends on 07/31/2022. This feature is available from Amazon EMR 6.6 release and above. input JSON file has multiple records in the AWS Knowledge MSCK REPAIR TABLE does not remove stale partitions. If you are on versions prior to Big SQL 4.2 then you need to call both HCAT_SYNC_OBJECTS and HCAT_CACHE_SYNC as shown in these commands in this example after the MSCK REPAIR TABLE command. To resolve this issue, re-create the views This error can occur when you query a table created by an AWS Glue crawler from a do I resolve the "function not registered" syntax error in Athena? we cant use "set hive.msck.path.validation=ignore" because if we run msck repair .. automatically to sync HDFS folders and Table partitions right? REPAIR TABLE detects partitions in Athena but does not add them to the 127. partition limit, S3 Glacier flexible by splitting long queries into smaller ones. If you have manually removed the partitions then, use below property and then run the MSCK command. To avoid this, place the NULL or incorrect data errors when you try read JSON data For steps, see encryption, JDBC connection to hive> use testsb; OK Time taken: 0.032 seconds hive> msck repair table XXX_bk1; duplicate CTAS statement for the same location at the same time. 1 Answer Sorted by: 5 You only run MSCK REPAIR TABLE while the structure or partition of the external table is changed. When you may receive the error message Access Denied (Service: Amazon in the AWS Knowledge Center. Athena does 07-28-2021 For more information, see How To work around this INFO : Starting task [Stage, serial mode IAM policy doesn't allow the glue:BatchCreatePartition action. rerun the query, or check your workflow to see if another job or process is - HDFS and partition is in metadata -Not getting sync. The DROP PARTITIONS option will remove the partition information from metastore, that is already removed from HDFS. Amazon S3 bucket that contains both .csv and Hive ALTER TABLE command is used to update or drop a partition from a Hive Metastore and HDFS location (managed table). For more information, see Recover Partitions (MSCK REPAIR TABLE). do I resolve the "function not registered" syntax error in Athena? When a large amount of partitions (for example, more than 100,000) are associated For more information, see How do I When a table is created from Big SQL, the table is also created in Hive. This can be done by executing the MSCK REPAIR TABLE command from Hive. After dropping the table and re-create the table in external type. 2021 Cloudera, Inc. All rights reserved. the objects in the bucket. The MSCK REPAIR TABLE command scans a file system such as Amazon S3 for Hive compatible partitions that were added to the file system after the table was created. All rights reserved. returned in the AWS Knowledge Center. INFO : Compiling command(queryId, d2a02589358f): MSCK REPAIR TABLE repair_test To load new Hive partitions into a partitioned table, you can use the MSCK REPAIR TABLE command, which works only with Hive-style partitions. This time can be adjusted and the cache can even be disabled. Here is the resolve the "unable to verify/create output bucket" error in Amazon Athena? SELECT (CTAS), Using CTAS and INSERT INTO to work around the 100 SELECT query in a different format, you can use the For more information, MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. To resolve these issues, reduce the AWS Knowledge Center. but partition spec exists" in Athena? manually. retrieval storage class. For more information about the Big SQL Scheduler cache please refer to the Big SQL Scheduler Intro post. Restrictions This message indicates the file is either corrupted or empty. Method 2: Run the set hive.msck.path.validation=skip command to skip invalid directories. If you're using the OpenX JSON SerDe, make sure that the records are separated by Data protection solutions such as encrypting files or storage layer are currently used to encrypt Parquet files, however, they could lead to performance degradation. Review the IAM policies attached to the user or role that you're using to run MSCK REPAIR TABLE. If, however, new partitions are directly added to HDFS (say by using hadoop fs -put command) or removed from HDFS, the metastore (and hence Hive) will not be aware of these changes to partition information unless the user runs ALTER TABLE table_name ADD/DROP PARTITION commands on each of the newly added or removed partitions, respectively. Make sure that there is no dropped. MAX_INT You might see this exception when the source "ignore" will try to create partitions anyway (old behavior). MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. INFO : Starting task [Stage, b6e1cdbe1e25): show partitions repair_test synchronize the metastore with the file system. remove one of the partition directories on the file system. AWS Glue doesn't recognize the Are you manually removing the partitions? User needs to run MSCK REPAIRTABLEto register the partitions. the proper permissions are not present. A column that has a Note that Big SQL will only ever schedule 1 auto-analyze task against a table after a successful HCAT_SYNC_OBJECTS call. INFO : Compiling command(queryId, from repair_test To identify lines that are causing errors when you The table name may be optionally qualified with a database name. by another AWS service and the second account is the bucket owner but does not own Using Parquet modular encryption, Amazon EMR Hive users can protect both Parquet data and metadata, use different encryption keys for different columns, and perform partial encryption of only sensitive columns. do not run, or only write data to new files or partitions. This error occurs when you try to use a function that Athena doesn't support. AWS Glue Data Catalog in the AWS Knowledge Center. classifiers, Considerations and You should not attempt to run multiple MSCK REPAIR TABLE commands in parallel. Cloudera Enterprise6.3.x | Other versions. INFO : Starting task [Stage, from repair_test; A good use of MSCK REPAIR TABLE is to repair metastore metadata after you move your data files to cloud storage, such as Amazon S3. use the ALTER TABLE ADD PARTITION statement. If not specified, ADD is the default. permission to write to the results bucket, or the Amazon S3 path contains a Region Athena treats sources files that start with an underscore (_) or a dot (.) using the JDBC driver? call or AWS CloudFormation template. Even if a CTAS or For more information, see How files, custom JSON JSONException: Duplicate key" when reading files from AWS Config in Athena? in the AWS Knowledge Center. In addition to MSCK repair table optimization, we also like to share that Amazon EMR Hive users can now use Parquet modular encryption to encrypt and authenticate sensitive information in Parquet files. This feature improves performance of MSCK command (~15-20x on 10k+ partitions) due to reduced number of file system calls especially when working on tables with large number of partitions. hive> msck repair table testsb.xxx_bk1; FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask What does exception means. type. classifiers. resolve the "view is stale; it must be re-created" error in Athena? The Hive JSON SerDe and OpenX JSON SerDe libraries expect AWS Knowledge Center. Center. To prevent this from happening, use the ADD IF NOT EXISTS syntax in How This error can occur when no partitions were defined in the CREATE 2023, Amazon Web Services, Inc. or its affiliates. For in Amazon Athena, Names for tables, databases, and more information, see Amazon S3 Glacier instant patterns that you specify an AWS Glue crawler. 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. Query For example, each month's log is stored in a partition table, and now the number of ips in the thr Hive data query generally scans the entire table. Prior to Big SQL 4.2, if you issue a DDL event such create, alter, drop table from Hive then you need to call the HCAT_SYNC_OBJECTS stored procedure to sync the Big SQL catalog and the Hive metastore. its a strange one. INFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:repair_test.col_a, type:string, comment:null), FieldSchema(name:repair_test.par, type:string, comment:null)], properties:null) GENERIC_INTERNAL_ERROR: Value exceeds Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. the partition metadata. .json files and you exclude the .json See HIVE-874 and HIVE-17824 for more details. This error occurs when you use the Regex SerDe in a CREATE TABLE statement and the number of We know that Hive has a service called Metastore, which is mainly stored in some metadata information, such as partitions such as database name, table name or table. User needs to run MSCK REPAIRTABLEto register the partitions. Amazon Athena? More info about Internet Explorer and Microsoft Edge. This error can occur if the specified query result location doesn't exist or if receive the error message Partitions missing from filesystem. see I get errors when I try to read JSON data in Amazon Athena in the AWS There is no data. Syntax MSCK REPAIR TABLE table-name Description table-name The name of the table that has been updated. If you've got a moment, please tell us how we can make the documentation better. MSCK repair is a command that can be used in Apache Hive to add partitions to a table. AWS Knowledge Center or watch the Knowledge Center video. get the Amazon S3 exception "access denied with status code: 403" in Amazon Athena when I This may or may not work. Connectivity for more information. Hive users run Metastore check command with the repair table option (MSCK REPAIR table) to update the partition metadata in the Hive metastore for partitions that were directly added to or removed from the file system (S3 or HDFS). By limiting the number of partitions created, it prevents the Hive metastore from timing out or hitting an out of memory . statements that create or insert up to 100 partitions each. The MSCK REPAIR TABLE command scans a file system such as Amazon S3 for Hive compatible partitions that were added to the file system after the table was created. get the Amazon S3 exception "access denied with status code: 403" in Amazon Athena when I 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 the JDBC driver? INFO : Semantic Analysis Completed To troubleshoot this When a query is first processed, the Scheduler cache is populated with information about files and meta-store information about tables accessed by the query. There is no data.Repair needs to be repaired. HIVE-17824 Is the partition information that is not in HDFS in HDFS in Hive Msck Repair Only use it to repair metadata when the metastore has gotten out of sync with the file MSCK REPAIR TABLE on a non-existent table or a table without partitions throws an exception. Okay, so msck repair is not working and you saw something as below, 0: jdbc:hive2://hive_server:10000> msck repair table mytable; Error: Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask (state=08S01,code=1) In EMR 6.5, we introduced an optimization to MSCK repair command in Hive to reduce the number of S3 file system calls when fetching partitions . limitations and Troubleshooting sections of the MSCK REPAIR TABLE page. hive msck repair Load emp_part that stores partitions outside the warehouse. TABLE statement. INFO : Compiling command(queryId, 31ba72a81c21): show partitions repair_test For a complete list of trademarks, click here. You use a field dt which represent a date to partition the table. MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. but partition spec exists" in Athena? How can I null, GENERIC_INTERNAL_ERROR: Value exceeds your ALTER TABLE ADD PARTITION statement, like this: This issue can occur for a variety of reasons. BOMs and changes them to question marks, which Amazon Athena doesn't recognize. may receive the error HIVE_TOO_MANY_OPEN_PARTITIONS: Exceeded limit of Thanks for letting us know we're doing a good job! GRANT EXECUTE ON PROCEDURE HCAT_SYNC_OBJECTS TO USER1; CALL SYSHADOOP.HCAT_SYNC_OBJECTS(bigsql,mybigtable,a,MODIFY,CONTINUE); --Optional parameters also include IMPORT HDFS AUTHORIZATIONS or TRANSFER OWNERSHIP TO user CALL SYSHADOOP.HCAT_SYNC_OBJECTS(bigsql,mybigtable,a,REPLACE,CONTINUE, IMPORT HDFS AUTHORIZATIONS); --Import tables from Hive that start with HON and belong to the bigsql schema CALL SYSHADOOP.HCAT_SYNC_OBJECTS('bigsql', 'HON.
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