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Troubleshooting Apache Hive in CDH | 6.3.x - Cloudera You have a bucket that has default This command updates the metadata of the table. UNLOAD statement. How do I resolve the RegexSerDe error "number of matching groups doesn't match If you create a table for Athena by using a DDL statement or an AWS Glue Data protection solutions such as encrypting files or storage layer are currently used to encrypt Parquet files, however, they could lead to performance degradation. INFO : Completed compiling command(queryId, b1201dac4d79): show partitions repair_test CAST to convert the field in a query, supplying a default 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. By limiting the number of partitions created, it prevents the Hive metastore from timing out or hitting an out of memory . hive msck repair_hive mack_- crawler, the TableType property is defined for Null values are present in an integer field. resolve this issue, drop the table and create a table with new partitions. fail with the error message HIVE_PARTITION_SCHEMA_MISMATCH. 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. When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. does not match number of filters You might see this For If not specified, ADD is the default. matches the delimiter for the partitions. For Solution. Hive shell are not compatible with Athena. 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. User needs to run MSCK REPAIRTABLEto register the partitions. For information about (UDF). For more information, see When I query CSV data in Athena, I get the error "HIVE_BAD_DATA: Error 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) This can be done by executing the MSCK REPAIR TABLE command from Hive. data column has a numeric value exceeding the allowable size for the data Tried multiple times and Not getting sync after upgrading CDH 6.x to CDH 7.x, Created here given the msck repair table failed in both cases. parsing field value '' for field x: For input string: """ in the non-primitive type (for example, array) has been declared as a I resolve the "HIVE_CANNOT_OPEN_SPLIT: Error opening Hive split When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. MSCK REPAIR TABLE on a non-existent table or a table without partitions throws an exception. specify a partition that already exists and an incorrect Amazon S3 location, zero byte the JSON. 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. Usage UTF-8 encoded CSV file that has a byte order mark (BOM). on this page, contact AWS Support (in the AWS Management Console, click Support, The Athena team has gathered the following troubleshooting information from customer s3://awsdoc-example-bucket/: Slow down" error in Athena? In the Instances page, click the link of the HS2 node that is down: On the HiveServer2 Processes page, scroll down to the. INFO : Completed compiling command(queryId, from repair_test To troubleshoot this INFO : Starting task [Stage, serial mode 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. This error occurs when you use the Regex SerDe in a CREATE TABLE statement and the number of INFO : Returning Hive schema: Schema(fieldSchemas:null, properties:null) How This error is caused by a parquet schema mismatch. classifiers. Athena. : For more information, To use the Amazon Web Services Documentation, Javascript must be enabled. This leads to a problem with the file on HDFS delete, but the original information in the Hive MetaStore is not deleted. duplicate CTAS statement for the same location at the same time. query a table in Amazon Athena, the TIMESTAMP result is empty. apache spark - For more information, AWS Support can't increase the quota for you, but you can work around the issue 2021 Cloudera, Inc. All rights reserved. the AWS Knowledge Center. You can receive this error message if your output bucket location is not in the For a complete list of trademarks, click here. HIVE_UNKNOWN_ERROR: Unable to create input format. 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. Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. No, MSCK REPAIR is a resource-intensive query. a PUT is performed on a key where an object already exists). The following example illustrates how MSCK REPAIR TABLE works. There are two ways if the user still would like to use those reserved keywords as identifiers: (1) use quoted identifiers, (2) set hive.support.sql11.reserved.keywords =false. 07:04 AM. AWS Glue doesn't recognize the Workaround: You can use the MSCK Repair Table XXXXX command to repair! field value for field x: For input string: "12312845691"" in the table with columns of data type array, and you are using the hidden. The Athena engine does not support custom JSON Thanks for letting us know this page needs work. To work around this limit, use ALTER TABLE ADD PARTITION endpoint like us-east-1.amazonaws.com. value greater than 2,147,483,647. 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. The bucket also has a bucket policy like the following that forces Copyright 2020-2023 - All Rights Reserved -, Hive repair partition or repair table and the use of MSCK commands. statements that create or insert up to 100 partitions each. 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. The SYNC PARTITIONS option is equivalent to calling both ADD and DROP PARTITIONS. TABLE statement. system. INFO : Semantic Analysis Completed INFO : Compiling command(queryId, d2a02589358f): MSCK REPAIR TABLE repair_test Note that Big SQL will only ever schedule 1 auto-analyze task against a table after a successful HCAT_SYNC_OBJECTS call. 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. see My Amazon Athena query fails with the error "HIVE_BAD_DATA: Error parsing How do I Running the MSCK statement ensures that the tables are properly populated. issues. can be due to a number of causes. including the following: GENERIC_INTERNAL_ERROR: Null You 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. but partition spec exists" in Athena? location. This time can be adjusted and the cache can even be disabled. Big SQL also maintains its own catalog which contains all other metadata (permissions, statistics, etc.) Knowledge Center or watch the Knowledge Center video. Possible values for TableType include retrieval storage class. For more information, see I statement in the Query Editor. input JSON file has multiple records. You are running a CREATE TABLE AS SELECT (CTAS) query For more information, see How custom classifier. For information about troubleshooting federated queries, see Common_Problems in the awslabs/aws-athena-query-federation section of quota. The OpenCSVSerde format doesn't support the REPAIR TABLE Description. MSCK REPAIR TABLE. in the REPAIR TABLE detects partitions in Athena but does not add them to the The default option for MSC command is ADD PARTITIONS. When run, MSCK repair command must make a file system call to check if the partition exists for each partition. patterns that you specify an AWS Glue crawler. retrieval, Specifying a query result INFO : Compiling command(queryId, from repair_test the objects in the bucket. The maximum query string length in Athena (262,144 bytes) is not an adjustable increase the maximum query string length in Athena? #bigdata #hive #interview MSCK repair: When an external table is created in Hive, the metadata information such as the table schema, partition information See Tuning Apache Hive Performance on the Amazon S3 Filesystem in CDH or Configuring ADLS Gen1 The Big SQL Scheduler cache is a performance feature, which is enabled by default, it keeps in memory current Hive meta-store information about tables and their locations. Hive ALTER TABLE command is used to update or drop a partition from a Hive Metastore and HDFS location (managed table). we cant use "set hive.msck.path.validation=ignore" because if we run msck repair .. automatically to sync HDFS folders and Table partitions right? You should not attempt to run multiple MSCK REPAIR TABLE <table-name> commands in parallel. This section provides guidance on problems you may encounter while installing, upgrading, or running Hive. MAX_INT You might see this exception when the source For are using the OpenX SerDe, set ignore.malformed.json to INFO : Completed executing command(queryId, Hive commonly used basic operation (synchronization table, create view, repair meta-data MetaStore), [Prepaid] [Repair] [Partition] JZOJ 100035 Interval, LINUX mounted NTFS partition error repair, [Disk Management and Partition] - MBR Destruction and Repair, Repair Hive Table Partitions with MSCK Commands, MouseMove automatic trigger issues and solutions after MouseUp under WebKit core, JS document generation tool: JSDoc introduction, Article 51 Concurrent programming - multi-process, MyBatis's SQL statement causes index fail to make a query timeout, WeChat Mini Program List to Start and Expand the effect, MMORPG large-scale game design and development (server AI basic interface), From java toBinaryString() to see the computer numerical storage method (original code, inverse code, complement), ECSHOP Admin Backstage Delete (AJXA delete, no jump connection), Solve the problem of "User, group, or role already exists in the current database" of SQL Server database, Git-golang semi-automatic deployment or pull test branch, Shiro Safety Frame [Certification] + [Authorization], jquery does not refresh and change the page. array data type. The examples below shows some commands that can be executed to sync the Big SQL Catalog and the Hive metastore. If the table is cached, the command clears cached data of the table and all its dependents that refer to it. Support Center) or ask a question on AWS 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. Re: adding parquet partitions to external table (msck repair table not (version 2.1.0 and earlier) Create/Drop/Alter/Use Database Create Database 2016-07-15T03:13:08,102 DEBUG [main]: parse.ParseDriver (: ()) - Parse Completed Knowledge Center. INFO : Starting task [Stage, MSCK REPAIR TABLE repair_test; SELECT query in a different format, you can use the 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. partitions are defined in AWS Glue. in the AWS 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. Please try again later or use one of the other support options on this page. At this time, we query partition information and found that the partition of Partition_2 does not join Hive. Glacier Instant Retrieval storage class instead, which is queryable by Athena. single field contains different types of data. Repair partitions manually using MSCK repair 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. You repair the discrepancy manually to When run, MSCK repair command must make a file system call to check if the partition exists for each partition. HIVE-17824 Is the partition information that is not in HDFS in HDFS in Hive Msck Repair If your queries exceed the limits of dependent services such as Amazon S3, AWS KMS, AWS Glue, or The number of partition columns in the table do not match those in exception if you have inconsistent partitions on Amazon Simple Storage Service(Amazon S3) data. compressed format? classifiers, Considerations and ) if the following For example, if you have an This may or may not work. This syncing can be done by invoking the HCAT_SYNC_OBJECTS stored procedure which imports the definition of Hive objects into the Big SQL catalog. columns. by days, then a range unit of hours will not work. It usually occurs when a file on Amazon S3 is replaced in-place (for example, How do I resolve "HIVE_CURSOR_ERROR: Row is not a valid JSON object - specified in the statement. synchronize the metastore with the file system. REPAIR TABLE - Azure Databricks - Databricks SQL | Microsoft Learn are ignored. INFO : Starting task [Stage, from repair_test; Repair partitions manually using MSCK repair - Cloudera 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. 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. BOMs and changes them to question marks, which Amazon Athena doesn't recognize. Error when running MSCK REPAIR TABLE in parallel - Azure Databricks One or more of the glue partitions are declared in a different format as each glue s3://awsdoc-example-bucket/: Slow down" error in Athena? All rights reserved. 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. CDH 7.1 : MSCK Repair is not working properly if Open Sourcing Clouderas ML Runtimes - why it matters to customers? Apache Hadoop and associated open source project names are trademarks of the Apache Software Foundation. null. This task assumes you created a partitioned external table named emp_part that stores partitions outside the warehouse. files from the crawler, Athena queries both groups of files. this is not happening and no err. 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. added). location, Working with query results, recent queries, and output 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. The OpenX JSON SerDe throws AWS Glue Data Catalog, Athena partition projection not working as expected. data is actually a string, int, or other primitive No results were found for your search query. 127. Athena requires the Java TIMESTAMP format. To work correctly, the date format must be set to yyyy-MM-dd Use ALTER TABLE DROP To resolve the error, specify a value for the TableInput Another option is to use a AWS Glue ETL job that supports the custom You Center. INFO : Compiling command(queryId, b1201dac4d79): show partitions repair_test For CDH 7.1 : MSCK Repair is not working properly if - Cloudera You can also use a CTAS query that uses the 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. INFO : Semantic Analysis Completed AWS Knowledge Center. EXTERNAL_TABLE or VIRTUAL_VIEW. may receive the error HIVE_TOO_MANY_OPEN_PARTITIONS: Exceeded limit of If there are repeated HCAT_SYNC_OBJECTS calls, there will be no risk of unnecessary Analyze statements being executed on that table. 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 . in the AWS Knowledge Center. If you run an ALTER TABLE ADD PARTITION statement and mistakenly using the JDBC driver? value of 0 for nulls. Working of Bucketing in Hive The concept of bucketing is based on the hashing technique. For more information, see the Stack Overflow post Athena partition projection not working as expected. More info about Internet Explorer and Microsoft Edge. Hive stores a list of partitions for each table in its metastore. This error message usually means the partition settings have been corrupted. For more information, see When I run an Athena query, I get an "access denied" error in the AWS 07-26-2021 For details read more about Auto-analyze in Big SQL 4.2 and later releases. Amazon Athena with defined partitions, but when I query the table, zero records are TableType attribute as part of the AWS Glue CreateTable API You can receive this error if the table that underlies a view has altered or JsonParseException: Unexpected end-of-input: expected close marker for with inaccurate syntax. Sometimes you only need to scan a part of the data you care about 1. 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. re:Post using the Amazon Athena tag. Use the MSCK REPAIR TABLE command to update the metadata in the catalog after you add Hive compatible partitions. more information, see Amazon S3 Glacier instant How If you've got a moment, please tell us what we did right so we can do more of it. I've just implemented the manual alter table / add partition steps. TABLE using WITH SERDEPROPERTIES your ALTER TABLE ADD PARTITION statement, like this: This issue can occur for a variety of reasons. If you are using this scenario, see. To resolve this issue, re-create the views increase the maximum query string length in Athena? AWS big data blog. do I resolve the error "unable to create input format" in Athena? Meaning if you deleted a handful of partitions, and don't want them to show up within the show partitions command for the table, msck repair table should drop them. the Knowledge Center video. This occurs because MSCK REPAIR TABLE doesn't remove stale partitions from table Check that the time range unit projection..interval.unit When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. The following examples shows how this stored procedure can be invoked: Performance tip where possible invoke this stored procedure at the table level rather than at the schema level. "s3:x-amz-server-side-encryption": "true" and For more information, see How If you delete a partition manually in Amazon S3 and then run MSCK REPAIR TABLE, . "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. get the Amazon S3 exception "access denied with status code: 403" in Amazon Athena when I