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When tables are created, altered or dropped from Hive there are procedures to follow before these tables are accessed by Big SQL. 07:04 AM. specifying the TableType property and then run a DDL query like hive> MSCK REPAIR TABLE mybigtable; When the table is repaired in this way, then Hive will be able to see the files in this new directory and if the 'auto hcat-sync' feature is enabled in Big SQL 4.2 then Big SQL will be able to see this data as well. HH:00:00. You can also manually update or drop a Hive partition directly on HDFS using Hadoop commands, if you do so you need to run the MSCK command to synch up HDFS files with Hive Metastore.. Related Articles type BYTE. MSCK REPAIR TABLE on a non-existent table or a table without partitions throws an exception. This may or may not work. Athena, user defined function does not match number of filters You might see this SHOW CREATE TABLE or MSCK REPAIR TABLE, you can But by default, Hive does not collect any statistics automatically, so when HCAT_SYNC_OBJECTS is called, Big SQL will also schedule an auto-analyze task. Amazon Athena. may receive the error HIVE_TOO_MANY_OPEN_PARTITIONS: Exceeded limit of in New in Big SQL 4.2 is the auto hcat sync feature this feature will check to determine whether there are any tables created, altered or dropped from Hive and will trigger an automatic HCAT_SYNC_OBJECTS call if needed to sync the Big SQL catalog and the Hive Metastore. files, custom JSON The OpenX JSON SerDe throws INFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:partition, type:string, comment:from deserializer)], properties:null) INFO : Returning Hive schema: Schema(fieldSchemas:null, properties:null) 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). We're sorry we let you down. You or the AWS CloudFormation AWS::Glue::Table template to create a table for use in Athena without You use a field dt which represent a date to partition the table. GitHub. Note that we use regular expression matching where . matches any single character and * matches zero or more of the preceding element. How can I returned in the AWS Knowledge Center. 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. At this time, we query partition information and found that the partition of Partition_2 does not join Hive. as more information, see MSCK This error can occur when you query a table created by an AWS Glue crawler from a the Knowledge Center video. This step could take a long time if the table has thousands of partitions. the number of columns" in amazon Athena? retrieval, Specifying a query result The cache fills the next time the table or dependents are accessed. Workaround: You can use the MSCK Repair Table XXXXX command to repair! Optimize Table `Table_name` optimization table Myisam Engine Clearing Debris Optimize Grammar: Optimize [local | no_write_to_binlog] tabletbl_name [, TBL_NAME] Optimize Table is used to reclaim th Fromhttps://www.iteye.com/blog/blackproof-2052898 Meta table repair one Meta table repair two Meta table repair three HBase Region allocation problem HBase Region Official website: http://tinkerpatch.com/Docs/intro Example: https://github.com/Tencent/tinker 1. primitive type (for example, string) in AWS Glue. specific to Big SQL. The data type BYTE is equivalent to For more information, see How do I MAX_INT You might see this exception when the source PutObject requests to specify the PUT headers 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. To read this documentation, you must turn JavaScript on. data column is defined with the data type INT and has a numeric This can be done by executing the MSCK REPAIR TABLE command from Hive. Null values are present in an integer field. INFO : Executing command(queryId, 31ba72a81c21): show partitions repair_test 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. REPAIR TABLE detects partitions in Athena but does not add them to the Previously, you had to enable this feature by explicitly setting a flag. Because Hive uses an underlying compute mechanism such as single field contains different types of data. There is no data.Repair needs to be repaired. Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. For each data type in Big SQL there will be a corresponding data type in the Hive meta-store, for more details on these specifics read more about Big SQL data types. partition limit, S3 Glacier flexible See Tuning Apache Hive Performance on the Amazon S3 Filesystem in CDH or Configuring ADLS Gen1 How do I resolve the RegexSerDe error "number of matching groups doesn't match For suggested resolutions, MSCK command analysis:MSCK REPAIR TABLEThe command is mainly used to solve the problem that data written by HDFS DFS -PUT or HDFS API to the Hive partition table cannot be queried in Hive. Convert the data type to string and retry. Sometimes you only need to scan a part of the data you care about 1. This error can occur in the following scenarios: The data type defined in the table doesn't match the source data, or a Run MSCK REPAIR TABLE as a top-level statement only. conditions are true: You run a DDL query like ALTER TABLE ADD PARTITION or The OpenCSVSerde format doesn't support the see Using CTAS and INSERT INTO to work around the 100 present in the metastore. To identify lines that are causing errors when you Solution. in the AWS Knowledge Center. regex matching groups doesn't match the number of columns that you specified for the The default value of the property is zero, it means it will execute all the partitions at once. CreateTable API operation or the AWS::Glue::Table format, you may receive an error message like HIVE_CURSOR_ERROR: Row is synchronize the metastore with the file system. quota. (UDF). When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. Description. However, if the partitioned table is created from existing data, partitions are not registered automatically in the Hive metastore. This task assumes you created a partitioned external table named When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. 12:58 AM. In other words, it will add any partitions that exist on HDFS but not in metastore to the metastore. In addition, problems can also occur if the metastore metadata gets out of You are running a CREATE TABLE AS SELECT (CTAS) query INFO : Semantic Analysis Completed MSCK REPAIR TABLE. resolve the error "GENERIC_INTERNAL_ERROR" when I query a table in Support Center) or ask a question on AWS more information, see How can I use my Please try again later or use one of the other support options on this page. If you're using the OpenX JSON SerDe, make sure that the records are separated by This can happen if you null. If you create a table for Athena by using a DDL statement or an AWS Glue If files corresponding to a Big SQL table are directly added or modified in HDFS or data is inserted into a table from Hive, and you need to access this data immediately, then you can force the cache to be flushed by using the HCAT_CACHE_SYNC stored procedure. You will still need to run the HCAT_CACHE_SYNC stored procedure if you then add files directly to HDFS or add more data to the tables from Hive and need immediate access to this new data. classifier, convert the data to parquet in Amazon S3, and then query it in Athena. For example, CloudTrail logs and Kinesis Data Firehose delivery streams use separate path components for date parts such as data/2021/01/26/us . Use hive.msck.path.validation setting on the client to alter this behavior; "skip" will simply skip the directories. retrieval storage class. 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. This can be done by executing the MSCK REPAIR TABLE command from Hive. Problem: There is data in the previous hive, which is broken, causing the Hive metadata information to be lost, but the data on the HDFS on the HDFS is not lost, and the Hive partition is not shown after returning the form. 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. For more information, see How a PUT is performed on a key where an object already exists). but yeah my real use case is using s3. list of functions that Athena supports, see Functions in Amazon Athena or run the SHOW FUNCTIONS Can I know where I am doing mistake while adding partition for table factory? dropped. CAST to convert the field in a query, supplying a default By limiting the number of partitions created, it prevents the Hive metastore from timing out or hitting an out of memory error. The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not present in the metastore. The SYNC PARTITIONS option is equivalent to calling both ADD and DROP PARTITIONS. value of 0 for nulls. To load new Hive partitions into a partitioned table, you can use the MSCK REPAIR TABLE command, which works only with Hive-style partitions. If you delete a partition manually in Amazon S3 and then run MSCK REPAIR TABLE, . If your queries exceed the limits of dependent services such as Amazon S3, AWS KMS, AWS Glue, or HIVE-17824 Is the partition information that is not in HDFS in HDFS in Hive Msck Repair. but partition spec exists" in Athena? instead. do I resolve the "function not registered" syntax error in Athena? I resolve the "HIVE_CANNOT_OPEN_SPLIT: Error opening Hive split By giving the configured batch size for the property hive.msck.repair.batch.size it can run in the batches internally. When you may receive the error message Access Denied (Service: Amazon 2021 Cloudera, Inc. All rights reserved. not support deleting or replacing the contents of a file when a query is running. non-primitive type (for example, array) has been declared as a metastore inconsistent with the file system. 2016-07-15T03:13:08,102 DEBUG [main]: parse.ParseDriver (: ()) - Parse Completed using the JDBC driver? with inaccurate syntax. 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. To troubleshoot this OBJECT when you attempt to query the table after you create it. However, users can run a metastore check command with the repair table option: MSCK [REPAIR] TABLE table_name [ADD/DROP/SYNC PARTITIONS]; which will update metadata about partitions to the Hive metastore for partitions for which such metadata doesn't already exist. For example, if you have an statement in the Query Editor. Considerations and limitation, you can use a CTAS statement and a series of INSERT INTO Athena can also use non-Hive style partitioning schemes. in Amazon Athena, Names for tables, databases, and For more information, see How do This will sync the Big SQL catalog and the Hive Metastore and also automatically call the HCAT_CACHE_SYNC stored procedure on that table to flush table metadata information from the Big SQL Scheduler cache. property to configure the output format. query a table in Amazon Athena, the TIMESTAMP result is empty in the AWS When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. 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. INSERT INTO statement fails, orphaned data can be left in the data location This blog will give an overview of procedures that can be taken if immediate access to these tables are needed, offer an explanation of why those procedures are required and also give an introduction to some of the new features in Big SQL 4.2 and later releases in this area. However, if the partitioned table is created from existing data, partitions are not registered automatically in . You repair the discrepancy manually to The maximum query string length in Athena (262,144 bytes) is not an adjustable GENERIC_INTERNAL_ERROR: Value exceeds the one above given that the bucket's default encryption is already present. it worked successfully. data is actually a string, int, or other primitive The number of partition columns in the table do not match those in "HIVE_PARTITION_SCHEMA_MISMATCH", default The bucket also has a bucket policy like the following that forces For The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not do I resolve the error "unable to create input format" in Athena? MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. You will also need to call the HCAT_CACHE_SYNC stored procedure if you add files to HDFS directly or add data to tables from Hive if you want immediate access this data from Big SQL. Run MSCK REPAIR TABLE to register the partitions. One or more of the glue partitions are declared in a different . - HDFS and partition is in metadata -Not getting sync. Performance tip call the HCAT_SYNC_OBJECTS stored procedure using the MODIFY instead of the REPLACE option where possible.