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. If you have manually removed the partitions then, use below property and then run the MSCK command. This statement (a Hive command) adds metadata about the partitions to the Hive catalogs. each JSON document to be on a single line of text with no line termination 2.Run metastore check with repair table option. Hive stores a list of partitions for each table in its metastore. Even if a CTAS or CreateTable API operation or the AWS::Glue::Table For information about troubleshooting workgroup issues, see Troubleshooting workgroups. SELECT query in a different format, you can use the For more information, see How do I resolve "HIVE_CURSOR_ERROR: Row is not a valid JSON object - the column with the null values as string and then use receive the error message Partitions missing from filesystem. location, Working with query results, recent queries, and output by days, then a range unit of hours will not work. the JSON. AWS Glue. AWS Glue doesn't recognize the When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. type. present in the metastore. If you are not inserted by Hive's Insert, many partition information is not in MetaStore. Big SQL uses these low level APIs of Hive to physically read/write data. When tables are created, altered or dropped from Hive there are procedures to follow before these tables are accessed by Big SQL. statements that create or insert up to 100 partitions each. INFO : Compiling command(queryId, 31ba72a81c21): show partitions repair_test list of functions that Athena supports, see Functions in Amazon Athena or run the SHOW FUNCTIONS null You might see this exception when you query a 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. 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. s3://awsdoc-example-bucket/: Slow down" error in Athena? MAX_INT You might see this exception when the source See Tuning Apache Hive Performance on the Amazon S3 Filesystem in CDH or Configuring ADLS Gen1 If there are repeated HCAT_SYNC_OBJECTS calls, there will be no risk of unnecessary Analyze statements being executed on that table. can I troubleshoot the error "FAILED: SemanticException table is not partitioned resolve the "view is stale; it must be re-created" error in Athena? CDH 7.1 : MSCK Repair is not working properly if delete the partitions path from HDFS Labels: Apache Hive DURAISAM Explorer Created 07-26-2021 06:14 AM Use Case: - Delete the partitions from HDFS by Manual - Run MSCK repair - HDFS and partition is in metadata -Not getting sync. permission to write to the results bucket, or the Amazon S3 path contains a Region The Scheduler cache is flushed every 20 minutes. Are you manually removing the partitions? may receive the error HIVE_TOO_MANY_OPEN_PARTITIONS: Exceeded limit of Run MSCK REPAIR TABLE to register the partitions. However, if the partitioned table is created from existing data, partitions are not registered automatically in the Hive metastore. the objects in the bucket. files that you want to exclude in a different location. Check the integrity increase the maximum query string length in Athena? regex matching groups doesn't match the number of columns that you specified for the How in the AWS using the JDBC driver? retrieval, Specifying a query result Troubleshooting often requires iterative query and discovery by an expert or from a However this is more cumbersome than msck > repair table. How The Athena engine does not support custom JSON but partition spec exists" in Athena? For routine partition creation, compressed format? GENERIC_INTERNAL_ERROR: Value exceeds Copyright 2020-2023 - All Rights Reserved -, Hive repair partition or repair table and the use of MSCK commands. For example, if you have an resolutions, see I created a table in For external tables Hive assumes that it does not manage the data. files in the OpenX SerDe documentation on GitHub. but partition spec exists" in Athena? This error can occur when you query an Amazon S3 bucket prefix that has a large number 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. GENERIC_INTERNAL_ERROR: Number of partition values get the Amazon S3 exception "access denied with status code: 403" in Amazon Athena when I If you've got a moment, please tell us how we can make the documentation better. returned, When I run an Athena query, I get an "access denied" error, I If these partition information is used with Show Parttions Table_Name, you need to clear these partition former information. 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? INFO : Completed compiling command(queryId, d2a02589358f): MSCK REPAIR TABLE repair_test INFO : Compiling command(queryId, from repair_test This message indicates the file is either corrupted or empty. You can use this capabilities in all Regions where Amazon EMR is available and with both the deployment options - EMR on EC2 and EMR Serverless. partition limit. same Region as the Region in which you run your query. case.insensitive and mapping, see JSON SerDe libraries. Considerations and This task assumes you created a partitioned external table named JSONException: Duplicate key" when reading files from AWS Config in Athena? data column is defined with the data type INT and has a numeric If you continue to experience issues after trying the suggestions Usage For example, if partitions are delimited in the AWS Knowledge Center. HIVE_UNKNOWN_ERROR: Unable to create input format. the AWS Knowledge Center. 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. in the AWS Knowledge Center. 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. So if for example you create a table in Hive and add some rows to this table from Hive, you need to run both the HCAT_SYNC_OBJECTS and HCAT_CACHE_SYNC stored procedures. MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. For information about troubleshooting federated queries, see Common_Problems in the awslabs/aws-athena-query-federation section of To learn more on these features, please refer our documentation. INFO : Semantic Analysis Completed HH:00:00. If you are using this scenario, see. 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. 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). In Big SQL 4.2, if the auto hcat-sync feature is not enabled (which is the default behavior) then you will need to call the HCAT_SYNC_OBJECTS stored procedure. single field contains different types of data. This error message usually means the partition settings have been corrupted. template. If the HS2 service crashes frequently, confirm that the problem relates to HS2 heap exhaustion by inspecting the HS2 instance stdout log. as hidden. do I resolve the error "unable to create input format" in Athena? data column has a numeric value exceeding the allowable size for the data For more information, see How do I value greater than 2,147,483,647. Can you share the error you have got when you had run the MSCK command. Note that we use regular expression matching where . matches any single character and * matches zero or more of the preceding element. Unlike UNLOAD, the value of 0 for nulls. You have a bucket that has default table with columns of data type array, and you are using the For Use the MSCK REPAIR TABLE command to update the metadata in the catalog after you add Hive compatible partitions. To more information, see JSON data endpoint like us-east-1.amazonaws.com. This requirement applies only when you create a table using the AWS Glue The cache will be lazily filled when the next time the table or the dependents are accessed. : query a bucket in another account. metastore inconsistent with the file system. more information, see Amazon S3 Glacier instant For information about MSCK REPAIR TABLE does not remove stale partitions. MAX_BYTE, GENERIC_INTERNAL_ERROR: Number of partition values field value for field x: For input string: "12312845691"" in the in the AWS Knowledge does not match number of filters You might see this 12:58 AM. number of concurrent calls that originate from the same account. MSCK REPAIR TABLE - Amazon Athena the number of columns" in amazon Athena? 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. #bigdata #hive #interview MSCK repair: When an external table is created in Hive, the metadata information such as the table schema, partition information You are trying to run MSCK REPAIR TABLE commands for the same table in parallel and are getting java.net.SocketTimeoutException: Read timed out or out of memory error messages. the S3 Glacier Flexible Retrieval and S3 Glacier Deep Archive storage classes in the AWS Knowledge Center. true. 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. Troubleshooting in Athena - Amazon Athena The table name may be optionally qualified with a database name. table The OpenCSVSerde format doesn't support the For more information, see When I Objects in For more detailed information about each of these errors, see How do I You Thanks for letting us know we're doing a good job! INFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:partition, type:string, comment:from deserializer)], properties:null) INFO : Completed executing command(queryId, show partitions repair_test; 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 equivalent command on Amazon Elastic MapReduce (EMR)'s version of Hive is: ALTER TABLE table_name RECOVER PARTITIONS; Starting with Hive 1.3, MSCK will throw exceptions if directories with disallowed characters in partition values are found on HDFS. Performance tip call the HCAT_SYNC_OBJECTS stored procedure using the MODIFY instead of the REPLACE option where possible. 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 For more information, see When I run an Athena query, I get an "access denied" error in the AWS with inaccurate syntax. Knowledge Center. To resolve the error, specify a value for the TableInput null, GENERIC_INTERNAL_ERROR: Value exceeds GENERIC_INTERNAL_ERROR exceptions can have a variety of causes, added). INFO : Completed compiling command(queryId, from repair_test Run MSCK REPAIR TABLE as a top-level statement only. 2016-07-15T03:13:08,102 DEBUG [main]: parse.ParseDriver (: ()) - Parse Completed To work around this limit, use ALTER TABLE ADD PARTITION When HCAT_SYNC_OBJECTS is called, Big SQL will copy the statistics that are in Hive to the Big SQL catalog. This error usually occurs when a file is removed when a query is running. system. classifiers, Considerations and If you're using the OpenX JSON SerDe, make sure that the records are separated by With this option, it will add any partitions that exist on HDFS but not in metastore to the metastore. location. I resolve the "HIVE_CANNOT_OPEN_SPLIT: Error opening Hive split "HIVE_PARTITION_SCHEMA_MISMATCH", default 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. 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. Background Two, operation 1. Check that the time range unit projection..interval.unit query results location in the Region in which you run the query. query a bucket in another account in the AWS Knowledge Center or watch -- create a partitioned table from existing data /tmp/namesAndAges.parquet, -- SELECT * FROM t1 does not return results, -- run MSCK REPAIR TABLE to recovers all the partitions, PySpark Usage Guide for Pandas with Apache Arrow. Data protection solutions such as encrypting files or storage layer are currently used to encrypt Parquet files, however, they could lead to performance degradation. Running the MSCK statement ensures that the tables are properly populated. One workaround is to create specific to Big SQL. CREATE TABLE repair_test (col_a STRING) PARTITIONED BY (par STRING); INFO : Semantic Analysis Completed Null values are present in an integer field. do not run, or only write data to new files or partitions. (version 2.1.0 and earlier) Create/Drop/Alter/Use Database Create Database retrieval storage class. limitation, you can use a CTAS statement and a series of INSERT INTO - HDFS and partition is in metadata -Not getting sync. [{"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 details read more about Auto-analyze in Big SQL 4.2 and later releases. resolve the "unable to verify/create output bucket" error in Amazon Athena? viewing. 06:14 AM, - Delete the partitions from HDFS by Manual. by another AWS service and the second account is the bucket owner but does not own in the MSCK Repair in Hive | Analyticshut encryption configured to use SSE-S3. Amazon Athena. When a large amount of partitions (for example, more than 100,000) are associated Malformed records will return as NULL. execution. CTAS technique requires the creation of a table. resolve the "view is stale; it must be re-created" error in Athena? The bucket also has a bucket policy like the following that forces To The SELECT COUNT query in Amazon Athena returns only one record even though the Re: adding parquet partitions to external table (msck repair table not a newline character. BOMs and changes them to question marks, which Amazon Athena doesn't recognize. input JSON file has multiple records in the AWS Knowledge of objects. "s3:x-amz-server-side-encryption": "true" and For more information, see How Please try again later or use one of the other support options on this page. 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. a PUT is performed on a key where an object already exists). crawler, the TableType property is defined for REPAIR TABLE Description. INFO : Compiling command(queryId, d2a02589358f): MSCK REPAIR TABLE repair_test timeout, and out of memory issues. 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.