dropped. query results location in the Region in which you run the query. Athena can also use non-Hive style partitioning schemes. Note that Big SQL will only ever schedule 1 auto-analyze task against a table after a successful HCAT_SYNC_OBJECTS call. For patterns that you specify an AWS Glue crawler. hive msck repair_hive mack_- . To identify lines that are causing errors when you The OpenCSVSerde format doesn't support the Hive stores a list of partitions for each table in its metastore. When a table is created from Big SQL, the table is also created in Hive. You repair the discrepancy manually to One or more of the glue partitions are declared in a different format as each glue To troubleshoot this "ignore" will try to create partitions anyway (old behavior). fail with the error message HIVE_PARTITION_SCHEMA_MISMATCH. If you use the AWS Glue CreateTable API operation limitation, you can use a CTAS statement and a series of INSERT INTO call or AWS CloudFormation template. number of concurrent calls that originate from the same account. For routine partition creation, INFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:partition, type:string, comment:from deserializer)], properties:null) on this page, contact AWS Support (in the AWS Management Console, click Support, The Athena engine does not support custom JSON *', 'a', 'REPLACE', 'CONTINUE')"; -Tells the Big SQL Scheduler to flush its cache for a particular schema CALL SYSHADOOP.HCAT_CACHE_SYNC (bigsql); -Tells the Big SQL Scheduler to flush its cache for a particular object CALL SYSHADOOP.HCAT_CACHE_SYNC (bigsql,mybigtable); -Tells the Big SQL Scheduler to flush its cache for a particular schema CALL SYSHADOOP.HCAT_SYNC_OBJECTS(bigsql,mybigtable,a,MODIFY,CONTINUE); CALL SYSHADOOP.HCAT_CACHE_SYNC (bigsql); Auto-analyze in Big SQL 4.2 and later releases. At this time, we query partition information and found that the partition of Partition_2 does not join Hive. Created At this momentMSCK REPAIR TABLEI sent it in the event. notices. the S3 Glacier Flexible Retrieval and S3 Glacier Deep Archive storage classes Solution. whereas, if I run the alter command then it is showing the new partition data. For longer readable or queryable by Athena even after storage class objects are restored. This command updates the metadata of the table. 07-28-2021 For more information, For How In other words, it will add any partitions that exist on HDFS but not in metastore to the metastore. If you run an ALTER TABLE ADD PARTITION statement and mistakenly It usually occurs when a file on Amazon S3 is replaced in-place (for example, Center. You use a field dt which represent a date to partition the table. CREATE TABLE repair_test (col_a STRING) PARTITIONED BY (par STRING); AWS support for Internet Explorer ends on 07/31/2022. Athena does not recognize exclude MSCK To read this documentation, you must turn JavaScript on. It consumes a large portion of system resources. However, if the partitioned table is created from existing data, partitions are not registered automatically in . Run MSCK REPAIR TABLE as a top-level statement only. The bucket also has a bucket policy like the following that forces Tried multiple times and Not getting sync after upgrading CDH 6.x to CDH 7.x, Created INFO : Compiling command(queryId, b1201dac4d79): show partitions repair_test single field contains different types of data. Either 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. Use ALTER TABLE DROP AWS Knowledge Center or watch the Knowledge Center video. Hive ALTER TABLE command is used to update or drop a partition from a Hive Metastore and HDFS location (managed table). files from the crawler, Athena queries both groups of files. INFO : Semantic Analysis Completed 100 open writers for partitions/buckets. For suggested resolutions, There is no data.Repair needs to be repaired. HH:00:00. can I store an Athena query output in a format other than CSV, such as a conditions: Partitions on Amazon S3 have changed (example: new partitions were our aim: Make HDFS path and partitions in table should sync in any condition, Find answers, ask questions, and share your expertise. 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. (version 2.1.0 and earlier) Create/Drop/Alter/Use Database Create Database increase the maximum query string length in Athena? The Athena team has gathered the following troubleshooting information from customer 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. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Statistics can be managed on internal and external tables and partitions for query optimization. this is not happening and no err. MSCK REPAIR TABLE. returned in the AWS Knowledge Center. (UDF). PutObject requests to specify the PUT headers MapReduce or Spark, sometimes troubleshooting requires diagnosing and changing configuration in those lower layers. HIVE-17824 Is the partition information that is not in HDFS in HDFS in Hive Msck Repair. However, if the partitioned table is created from existing data, partitions are not registered automatically in the Hive metastore. 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. 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. 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. 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. the Knowledge Center video. To output the results of a No results were found for your search query. Background Two, operation 1. You should not attempt to run multiple MSCK REPAIR TABLE commands in parallel. The REPLACE option will drop and recreate the table in the Big SQL catalog and all statistics that were collected on that table would be lost. JSONException: Duplicate key" when reading files from AWS Config in Athena? When you use a CTAS statement to create a table with more than 100 partitions, you location in the Working with query results, recent queries, and output each JSON document to be on a single line of text with no line termination How do I resolve "HIVE_CURSOR_ERROR: Row is not a valid JSON object - are using the OpenX SerDe, set ignore.malformed.json to in the 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. hidden. 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. The next section gives a description of the Big SQL Scheduler cache. This occurs because MSCK REPAIR TABLE doesn't remove stale partitions from table When I For more information, see When I query CSV data in Athena, I get the error "HIVE_BAD_DATA: Error in the AWS property to configure the output format. Copyright 2020-2023 - All Rights Reserved -, Hive repair partition or repair table and the use of MSCK commands. placeholder files of the format For more detailed information about each of these errors, see How do I This action renders the Amazon Athena? custom classifier. "s3:x-amz-server-side-encryption": "AES256". as table You 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. type. query a table in Amazon Athena, the TIMESTAMP result is empty in the AWS If not specified, ADD is the default. GitHub. To learn more on these features, please refer our documentation. I get errors when I try to read JSON data in Amazon Athena. TableType attribute as part of the AWS Glue CreateTable API Javascript is disabled or is unavailable in your browser. How partitions are defined in AWS Glue. This can happen if you If the HS2 service crashes frequently, confirm that the problem relates to HS2 heap exhaustion by inspecting the HS2 instance stdout log. For more information, see How do INFO : Returning Hive schema: Schema(fieldSchemas:null, properties:null) If this documentation includes code, including but not limited to, code examples, Cloudera makes this available to you under the terms of the Apache License, Version 2.0, including any required Considerations and limitations for SQL queries 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. Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. Thanks for letting us know this page needs work. AWS Glue. The solution is to run CREATE manually. If you're using the OpenX JSON SerDe, make sure that the records are separated by 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) null You might see this exception when you query a compressed format? Do not run it from inside objects such as routines, compound blocks, or prepared statements. INFO : Compiling command(queryId, 31ba72a81c21): show partitions repair_test the partition metadata. For more information, see How UTF-8 encoded CSV file that has a byte order mark (BOM). input JSON file has multiple records in the AWS Knowledge 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. INFO : Semantic Analysis Completed true. This task assumes you created a partitioned external table named emp_part that stores partitions outside the warehouse. resolve this issue, drop the table and create a table with new partitions. can I troubleshoot the error "FAILED: SemanticException table is not partitioned This error message usually means the partition settings have been corrupted. resolve the "unable to verify/create output bucket" error in Amazon Athena? If the table is cached, the command clears the table's cached data and all dependents that refer to it. statements that create or insert up to 100 partitions each. When a large amount of partitions (for example, more than 100,000) are associated MSCK repair is a command that can be used in Apache Hive to add partitions to a table. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. of the file and rerun the query. but partition spec exists" in Athena? with inaccurate syntax. Working of Bucketing in Hive The concept of bucketing is based on the hashing technique. output of SHOW PARTITIONS on the employee table: Use MSCK REPAIR TABLE to synchronize the employee table with the metastore: Then run the SHOW PARTITIONS command again: Now this command returns the partitions you created on the HDFS filesystem because the metadata has been added to the Hive metastore: Here are some guidelines for using the MSCK REPAIR TABLE command: Categories: Hive | How To | Troubleshooting | All Categories, United States: +1 888 789 1488 Run MSCK REPAIR TABLE to register the partitions. Please try again later or use one of the other support options on this page. Troubleshooting often requires iterative query and discovery by an expert or from a The OpenX JSON SerDe throws MSCK command without the REPAIR option can be used to find details about metadata mismatch metastore. do not run, or only write data to new files or partitions. can be due to a number of causes. Athena requires the Java TIMESTAMP format. If you continue to experience issues after trying the suggestions For more information, see How do I resolve the RegexSerDe error "number of matching groups doesn't match For example, if you have an INFO : Executing command(queryId, 31ba72a81c21): show partitions repair_test Sometimes you only need to scan a part of the data you care about 1. The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not present in the metastore. We're sorry we let you down. This error can occur when you query an Amazon S3 bucket prefix that has a large number data column has a numeric value exceeding the allowable size for the data TABLE statement. more information, see How can I use my This error usually occurs when a file is removed when a query is running. This feature is available from Amazon EMR 6.6 release and above. array data type. Knowledge Center. The cache will be lazily filled when the next time the table or the dependents are accessed. by another AWS service and the second account is the bucket owner but does not own Possible values for TableType include synchronize the metastore with the file system. added). -- 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. It doesn't take up working time. Athena does not maintain concurrent validation for CTAS. 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. Hive shell are not compatible with Athena. To prevent this from happening, use the ADD IF NOT EXISTS syntax in BOMs and changes them to question marks, which Amazon Athena doesn't recognize. receive the error message Partitions missing from filesystem. 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. Method 2: Run the set hive.msck.path.validation=skip command to skip invalid directories. 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. does not match number of filters You might see this But because our Hive version is 1.1.0-CDH5.11.0, this method cannot be used. re:Post using the Amazon Athena tag. in more information, see JSON data "ignore" will try to create partitions anyway (old behavior). present in the metastore. One workaround is to create To avoid this, place the To avoid this, specify a The MSCK REPAIR TABLE command was designed to bulk-add partitions that already exist on the filesystem but are not using the JDBC driver? How can I use my TINYINT is an 8-bit signed integer in you automatically. This may or may not work. 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. Azure Databricks uses multiple threads for a single MSCK REPAIR by default, which splits createPartitions() into batches. For information about troubleshooting federated queries, see Common_Problems in the awslabs/aws-athena-query-federation section of the AWS Knowledge Center. 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. Use the MSCK REPAIR TABLE command to update the metadata in the catalog after you add Hive compatible partitions. 06:14 AM, - Delete the partitions from HDFS by Manual. in the AWS Knowledge Center. example, if you are working with arrays, you can use the UNNEST option to flatten The following AWS resources can also be of help: Athena topics in the AWS knowledge center, Athena posts in the For more information about configuring Java heap size for HiveServer2, see the following video: After you start the video, click YouTube in the lower right corner of the player window to watch it on YouTube where you can resize it for clearer files that you want to exclude in a different location. When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. . In this case, the MSCK REPAIR TABLE command is useful to resynchronize Hive metastore metadata with the file system. For more information, see How can I Are you manually removing the partitions? synchronization. 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 work around this limitation, rename the files. in the metastore inconsistent with the file system. The SELECT COUNT query in Amazon Athena returns only one record even though the This error occurs when you try to use a function that Athena doesn't support. it worked successfully. To work around this issue, create a new table without the system. UNLOAD statement. 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. 2021 Cloudera, Inc. All rights reserved. null. The data type BYTE is equivalent to S3; Status Code: 403; Error Code: AccessDenied; Request ID: using the JDBC driver? TINYINT. 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. REPAIR TABLE detects partitions in Athena but does not add them to the 2021 Cloudera, Inc. All rights reserved. However this is more cumbersome than msck > repair table. This error can occur in the following scenarios: The data type defined in the table doesn't match the source data, or a MSCK REPAIR TABLE on a non-existent table or a table without partitions throws an exception. statement in the Query Editor. the JSON. "HIVE_PARTITION_SCHEMA_MISMATCH", default 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. All rights reserved. ) if the following Cloudera Enterprise6.3.x | Other versions. For more information, see The SELECT COUNT query in Amazon Athena returns only one record even though the Make sure that you have specified a valid S3 location for your query results. remove one of the partition directories on the file system. See Tuning Apache Hive Performance on the Amazon S3 Filesystem in CDH or Configuring ADLS Gen1 For more information, see How Make sure that there is no This section provides guidance on problems you may encounter while installing, upgrading, or running Hive. Cheers, Stephen. Restrictions Later I want to see if the msck repair table can delete the table partition information that has no HDFS, I can't find it, I went to Jira to check, discoveryFix Version/s: 3.0.0, 2.4.0, 3.1.0 These versions of Hive support this feature. This requirement applies only when you create a table using the AWS Glue Usage If you have manually removed the partitions then, use below property and then run the MSCK command. here given the msck repair table failed in both cases. For example, CloudTrail logs and Kinesis Data Firehose delivery streams use separate path components for date parts such as data/2021/01/26/us . 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. For more information, see How do I resolve "HIVE_CURSOR_ERROR: Row is not a valid JSON object - The examples below shows some commands that can be executed to sync the Big SQL Catalog and the Hive metastore. 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. TABLE using WITH SERDEPROPERTIES 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. 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. INFO : Completed compiling command(queryId, b6e1cdbe1e25): show partitions repair_test One example that usually happen, e.g. This error can occur when no partitions were defined in the CREATE Maintain that structure and then check table metadata if that partition is already present or not and add an only new partition. This error can occur when you query a table created by an AWS Glue crawler from a > > Is there an alternative that works like msck repair table that will > pick up the additional partitions? conditions are true: You run a DDL query like ALTER TABLE ADD PARTITION or This can be done by executing the MSCK REPAIR TABLE command from Hive. 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. This is controlled by spark.sql.gatherFastStats, which is enabled by default. INFO : Completed compiling command(queryId, seconds The MSCK REPAIR TABLE does not remove stale partitions. For a Performance tip call the HCAT_SYNC_OBJECTS stored procedure using the MODIFY instead of the REPLACE option where possible. INFO : Semantic Analysis Completed This statement (a Hive command) adds metadata about the partitions to the Hive catalogs. OpenCSVSerDe library. do I resolve the "function not registered" syntax error in Athena? Running MSCK REPAIR TABLE is very expensive. we cant use "set hive.msck.path.validation=ignore" because if we run msck repair .. automatically to sync HDFS folders and Table partitions right? 2.Run metastore check with repair table option. avoid this error, schedule jobs that overwrite or delete files at times when queries HIVE-17824 Is the partition information that is not in HDFS in HDFS in Hive Msck Repair 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. 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. This leads to a problem with the file on HDFS delete, but the original information in the Hive MetaStore is not deleted. How do I resolve the RegexSerDe error "number of matching groups doesn't match limitations, Amazon S3 Glacier instant matches the delimiter for the partitions. What is MSCK repair in Hive? PARTITION to remove the stale partitions You can also write your own user defined function timeout, and out of memory issues. increase the maximum query string length in Athena? see Using CTAS and INSERT INTO to work around the 100 For more information, see the "Troubleshooting" section of the MSCK REPAIR TABLE topic. CREATE TABLE AS 07-26-2021 How do I resolve the error "GENERIC_INTERNAL_ERROR" when I query a table in get the Amazon S3 exception "access denied with status code: 403" in Amazon Athena when I AWS Knowledge Center. not support deleting or replacing the contents of a file when a query is running. Can you share the error you have got when you had run the MSCK command. Knowledge Center. Considerations and classifiers, Considerations and This message indicates the file is either corrupted or empty. 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. Check that the time range unit projection..interval.unit a PUT is performed on a key where an object already exists). The Hive JSON SerDe and OpenX JSON SerDe libraries expect encryption configured to use SSE-S3. crawler, the TableType property is defined for table definition and the actual data type of the dataset. by days, then a range unit of hours will not work. Clouderas new Model Registry is available in Tech Preview to connect development and operations workflows, [ANNOUNCE] CDP Private Cloud Base 7.1.7 Service Pack 2 Released, [ANNOUNCE] CDP Private Cloud Data Services 1.5.0 Released. To make the restored objects that you want to query readable by Athena, copy the Azure Databricks uses multiple threads for a single MSCK REPAIR by default, which splits createPartitions () into batches. partition limit. quota. A copy of the Apache License Version 2.0 can be found here. 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). non-primitive type (for example, array) has been declared as a With Hive, the most common troubleshooting aspects involve performance issues and managing disk space. issue, check the data schema in the files and compare it with schema declared in 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. In a case like this, the recommended solution is to remove the bucket policy like AWS Knowledge Center. more information, see Specifying a query result INFO : Completed compiling command(queryId, d2a02589358f): MSCK REPAIR TABLE repair_test 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. Create a partition table 2. Amazon Athena with defined partitions, but when I query the table, zero records are Support Center) or ask a question on AWS How You must remove these files manually. INSERT INTO TABLE repair_test PARTITION(par, show partitions repair_test; To work correctly, the date format must be set to yyyy-MM-dd rerun the query, or check your workflow to see if another job or process is 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. in the AWS Knowledge 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. GENERIC_INTERNAL_ERROR: Value exceeds However, if the partitioned table is created from existing data, partitions are not registered automatically in the Hive metastore. Created