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. the number of columns" in amazon Athena? For a a PUT is performed on a key where an object already exists). When I the number of columns" in amazon Athena? I've just implemented the manual alter table / add partition steps. SELECT query in a different format, you can use the If you create a table for Athena by using a DDL statement or an AWS Glue MSCK REPAIR TABLE factory; Now the table is not giving the new partition content of factory3 file. For more information, see How can I The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not One workaround is to create 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. Big SQL uses these low level APIs of Hive to physically read/write data. 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One or more of the glue partitions are declared in a different format as each glue Background Two, operation 1. If partitions are manually added to the distributed file system (DFS), the metastore is not aware of these partitions. Create a partition table 2. in the AWS Knowledge Center. primitive type (for example, string) in AWS Glue. Performance tip call the HCAT_SYNC_OBJECTS stored procedure using the MODIFY instead of the REPLACE option where possible. This is overkill when we want to add an occasional one or two partitions to the table. Knowledge Center. Support Center) or ask a question on AWS By limiting the number of partitions created, it prevents the Hive metastore from timing out or hitting an out of memory . by another AWS service and the second account is the bucket owner but does not own Supported browsers are Chrome, Firefox, Edge, and Safari. If Big SQL realizes that the table did change significantly since the last Analyze was executed on the table then Big SQL will schedule an auto-analyze task. It doesn't take up working time. 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. If not specified, ADD is the default. For possible causes and This task assumes you created a partitioned external table named emp_part that stores partitions outside the warehouse. All rights reserved. MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. case.insensitive and mapping, see JSON SerDe libraries. Center. may receive the error HIVE_TOO_MANY_OPEN_PARTITIONS: Exceeded limit of including the following: GENERIC_INTERNAL_ERROR: Null You Athena can also use non-Hive style partitioning schemes. Knowledge Center. field value for field x: For input string: "12312845691"" in the When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. in Athena. get the Amazon S3 exception "access denied with status code: 403" in Amazon Athena when I exception if you have inconsistent partitions on Amazon Simple Storage Service(Amazon S3) data. template. dropped. INFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:partition, type:string, comment:from deserializer)], properties:null) do I resolve the "function not registered" syntax error in Athena? This error occurs when you use Athena to query AWS Config resources that have multiple Hive stores a list of partitions for each table in its metastore. whereas, if I run the alter command then it is showing the new partition data. INFO : Starting task [Stage, MSCK REPAIR TABLE repair_test; MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. For routine partition creation, avoid this error, schedule jobs that overwrite or delete files at times when queries Sometimes you only need to scan a part of the data you care about 1. Starting with Amazon EMR 6.8, we further reduced the number of S3 filesystem calls to make MSCK repair run faster and enabled this feature by default. specifying the TableType property and then run a DDL query like [{"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"}}]. the AWS Knowledge Center. The greater the number of new partitions, the more likely that a query will fail with a java.net.SocketTimeoutException: Read timed out error or an out of memory error message. Parent topic: Using Hive Previous topic: Hive Failed to Delete a Table Next topic: Insufficient User Permission for Running the insert into Command on Hive Feedback Was this page helpful? Review the IAM policies attached to the user or role that you're using to run MSCK REPAIR TABLE. community of helpers. See Tuning Apache Hive Performance on the Amazon S3 Filesystem in CDH or Configuring ADLS Gen1 solution is to remove the question mark in Athena or in AWS Glue. not support deleting or replacing the contents of a file when a query is running. partitions are defined in AWS Glue. You can receive this error message if your output bucket location is not in the Tried multiple times and Not getting sync after upgrading CDH 6.x to CDH 7.x, Created The maximum query string length in Athena (262,144 bytes) is not an adjustable 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. Usage GENERIC_INTERNAL_ERROR exceptions can have a variety of causes, For some > reason this particular source will not pick up added partitions with > msck repair table. the Knowledge Center video. returned, When I run an Athena query, I get an "access denied" error, I Dlink MySQL Table. For more information, see How Regarding Hive version: 2.3.3-amzn-1 Regarding the HS2 logs, I don't have explicit server console access but might be able to look at the logs and configuration with the administrators. For example, if partitions are delimited resolve the "view is stale; it must be re-created" error in Athena? 07-28-2021 2. . INFO : Completed compiling command(queryId, b1201dac4d79): show partitions repair_test Convert the data type to string and retry. When a large amount of partitions (for example, more than 100,000) are associated in define a column as a map or struct, but the underlying Make sure that there is no Amazon Athena? parsing field value '' for field x: For input string: """. metadata. You use a field dt which represent a date to partition the table. INFO : Completed executing command(queryId, show partitions repair_test; matches the delimiter for the partitions. data is actually a string, int, or other primitive data column has a numeric value exceeding the allowable size for the data Athena requires the Java TIMESTAMP format. GENERIC_INTERNAL_ERROR: Parent builder is by days, then a range unit of hours will not work. This can occur when you don't have permission to read the data in the bucket, INFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:partition, type:string, comment:from deserializer)], properties:null) Possible values for TableType include INFO : Executing command(queryId, 31ba72a81c21): show partitions repair_test MSCK The default value of the property is zero, it means it will execute all the partitions at once. in To troubleshoot this 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. conditions: Partitions on Amazon S3 have changed (example: new partitions were The DROP PARTITIONS option will remove the partition information from metastore, that is already removed from HDFS. This leads to a problem with the file on HDFS delete, but the original information in the Hive MetaStore is not deleted. UNLOAD statement. Use the MSCK REPAIR TABLE command to update the metadata in the catalog after you add Hive compatible partitions. If the table is cached, the command clears cached data of the table and all its dependents that refer to it. Unlike UNLOAD, the If you are using this scenario, see. 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. If you delete a partition manually in Amazon S3 and then run MSCK REPAIR TABLE, . For example, if partitions are delimited by days, then a range unit of hours will not work. Null values are present in an integer field. This feature is available from Amazon EMR 6.6 release and above. For TINYINT is an 8-bit signed integer in emp_part that stores partitions outside the warehouse. User needs to run MSCK REPAIRTABLEto register the partitions. Yes . re:Post using the Amazon Athena tag. list of functions that Athena supports, see Functions in Amazon Athena or run the SHOW FUNCTIONS By limiting the number of partitions created, it prevents the Hive metastore from timing out or hitting an out of memory error. table crawler, the TableType property is defined for (UDF). This command updates the metadata of the table. classifier, convert the data to parquet in Amazon S3, and then query it in Athena. For a complete list of trademarks, click here. placeholder files of the format For external tables Hive assumes that it does not manage the data. How can I use my Athena does with inaccurate syntax. 2021 Cloudera, Inc. All rights reserved. (UDF). Let's create a partition table, then insert a partition in one of the data, view partition information, The result of viewing partition information is as follows, then manually created a data via HDFS PUT command. limitation, you can use a CTAS statement and a series of INSERT INTO Knowledge Center. 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. However, if the partitioned table is created from existing data, partitions are not registered automatically in the Hive metastore. null. You can receive this error if the table that underlies a view has altered or 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) created in Amazon S3. input JSON file has multiple records in the AWS Knowledge It also gathers the fast stats (number of files and the total size of files) in parallel, which avoids the bottleneck of listing the metastore files sequentially. compressed format? This error can occur when you query a table created by an AWS Glue crawler from a INFO : Compiling command(queryId, d2a02589358f): MSCK REPAIR TABLE repair_test To work around this limitation, rename the files. see Using CTAS and INSERT INTO to work around the 100 files that you want to exclude in a different location. can be due to a number of causes. 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. 07-26-2021 Center. in the JSONException: Duplicate key" when reading files from AWS Config in Athena? the JSON. This error message usually means the partition settings have been corrupted. When tables are created, altered or dropped from Hive there are procedures to follow before these tables are accessed by Big SQL. value of 0 for nulls. do I resolve the "function not registered" syntax error in Athena? receive the error message FAILED: NullPointerException Name is more information, see JSON data system. the column with the null values as string and then use The data type BYTE is equivalent to partition limit. but yeah my real use case is using s3. each JSON document to be on a single line of text with no line termination in the AWS INFO : Compiling command(queryId, 31ba72a81c21): show partitions repair_test "HIVE_PARTITION_SCHEMA_MISMATCH". can I troubleshoot the error "FAILED: SemanticException table is not partitioned When you use the AWS Glue Data Catalog with Athena, the IAM policy must allow the glue:BatchCreatePartition action. Javascript is disabled or is unavailable in your browser. Amazon Athena. UTF-8 encoded CSV file that has a byte order mark (BOM). Use hive.msck.path.validation setting on the client to alter this behavior; "skip" will simply skip the directories. modifying the files when the query is running. 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. resolve the "view is stale; it must be re-created" error in Athena? resolve the error "GENERIC_INTERNAL_ERROR" when I query a table in 12:58 AM. If you're using the OpenX JSON SerDe, make sure that the records are separated by INFO : Semantic Analysis Completed using the JDBC driver? partition_value_$folder$ are This may or may not work. "HIVE_PARTITION_SCHEMA_MISMATCH", default OBJECT when you attempt to query the table after you create it. INFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:partition, type:string, comment:from deserializer)], properties:null) example, if you are working with arrays, you can use the UNNEST option to flatten But because our Hive version is 1.1.0-CDH5.11.0, this method cannot be used. This can be done by executing the MSCK REPAIR TABLE command from Hive. a newline character. by splitting long queries into smaller ones. How do I the objects in the bucket. This section provides guidance on problems you may encounter while installing, upgrading, or running Hive. This time can be adjusted and the cache can even be disabled. For AWS Support can't increase the quota for you, but you can work around the issue This error occurs when you use the Regex SerDe in a CREATE TABLE statement and the number of I created a table in This step could take a long time if the table has thousands of partitions. By default, Athena outputs files in CSV format only. Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. To learn more on these features, please refer our documentation. conditions are true: You run a DDL query like ALTER TABLE ADD PARTITION or To work correctly, the date format must be set to yyyy-MM-dd Athena, user defined function AWS Glue Data Catalog in the AWS Knowledge Center. Either IAM role credentials or switch to another IAM role when connecting to Athena Restrictions When a table is created, altered or dropped in Hive, the Big SQL Catalog and the Hive Metastore need to be synchronized so that Big SQL is aware of the new or modified table. The SELECT COUNT query in Amazon Athena returns only one record even though the For more information, see When I (version 2.1.0 and earlier) Create/Drop/Alter/Use Database Create Database or the AWS CloudFormation AWS::Glue::Table template to create a table for use in Athena without same Region as the Region in which you run your query. As long as the table is defined in the Hive MetaStore and accessible in the Hadoop cluster then both BigSQL and Hive can access it. Since Big SQL 4.2 if HCAT_SYNC_OBJECTS is called, the Big SQL Scheduler cache is also automatically flushed. Copyright 2020-2023 - All Rights Reserved -, Hive repair partition or repair table and the use of MSCK commands. MSCK REPAIR TABLE does not remove stale partitions. Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. GENERIC_INTERNAL_ERROR: Parent builder is present in the metastore. Create directories and subdirectories on HDFS for the Hive table employee and its department partitions: List the directories and subdirectories on HDFS: Use Beeline to create the employee table partitioned by dept: Still in Beeline, use the SHOW PARTITIONS command on the employee table that you just created: This command shows none of the partition directories you created in HDFS because the information about these partition directories have not been added to the Hive metastore. For information about Athena does not support querying the data in the S3 Glacier flexible 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. For details read more about Auto-analyze in Big SQL 4.2 and later releases. Can I know where I am doing mistake while adding partition for table factory? TABLE using WITH SERDEPROPERTIES Azure Databricks uses multiple threads for a single MSCK REPAIR by default, which splits createPartitions () into batches. Check that the time range unit projection..interval.unit MSCK REPAIR TABLE. To avoid this, specify a After running the MSCK Repair Table command, query partition information, you can see the partitioned by the PUT command is already available. rerun the query, or check your workflow to see if another job or process is By giving the configured batch size for the property hive.msck.repair.batch.size it can run in the batches internally. IAM role credentials or switch to another IAM role when connecting to Athena Workaround: You can use the MSCK Repair Table XXXXX command to repair! . To load new Hive partitions into a partitioned table, you can use the MSCK REPAIR TABLE command, which works only with Hive-style partitions. classifiers. INFO : Semantic Analysis Completed For more information about the Big SQL Scheduler cache please refer to the Big SQL Scheduler Intro post. In Big SQL 4.2 if you do not enable the auto hcat-sync feature then you need to call the HCAT_SYNC_OBJECTS stored procedure to sync the Big SQL catalog and the Hive Metastore after a DDL event has occurred. permission to write to the results bucket, or the Amazon S3 path contains a Region our aim: Make HDFS path and partitions in table should sync in any condition, Find answers, ask questions, and share your expertise. MSCK command without the REPAIR option can be used to find details about metadata mismatch metastore. query a bucket in another account in the AWS Knowledge Center or watch One or more of the glue partitions are declared in a different . with a particular table, MSCK REPAIR TABLE can fail due to memory For example, if you transfer data from one HDFS system to another, use MSCK REPAIR TABLE to make the Hive metastore aware of the partitions on the new HDFS. Please refer to your browser's Help pages for instructions. Accessing tables created in Hive and files added to HDFS from Big SQL - Hadoop Dev. GENERIC_INTERNAL_ERROR: Value exceeds It also allows clients to check integrity of the data retrieved while keeping all Parquet optimizations. The next section gives a description of the Big SQL Scheduler cache. CreateTable API operation or the AWS::Glue::Table "ignore" will try to create partitions anyway (old behavior). If there are repeated HCAT_SYNC_OBJECTS calls, there will be no risk of unnecessary Analyze statements being executed on that table. can I store an Athena query output in a format other than CSV, such as a as INFO : Completed compiling command(queryId, from repair_test 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. This error occurs when you try to use a function that Athena doesn't support. This can happen if you execution. 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. You With Parquet modular encryption, you can not only enable granular access control but also preserve the Parquet optimizations such as columnar projection, predicate pushdown, encoding and compression. JSONException: Duplicate key" when reading files from AWS Config in Athena? here given the msck repair table failed in both cases. field value for field x: For input string: "12312845691"", When I query CSV data in Athena, I get the error "HIVE_BAD_DATA: Error PARTITION to remove the stale partitions See HIVE-874 and HIVE-17824 for more details. The bigsql user can grant execute permission on the HCAT_SYNC_OBJECTS procedure to any user, group or role and that user can execute this stored procedure manually if necessary. property to configure the output format. PutObject requests to specify the PUT headers 100 open writers for partitions/buckets. Load data to the partition table 3. One example that usually happen, e.g. in Amazon Athena, Names for tables, databases, and NULL or incorrect data errors when you try read JSON data OpenCSVSerDe library. 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.