All rights reserved. rerun the query, or check your workflow to see if another job or process is 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. see Using CTAS and INSERT INTO to work around the 100 This is controlled by spark.sql.gatherFastStats, which is enabled by default. See HIVE-874 and HIVE-17824 for more details. This error can occur if the specified query result location doesn't exist or if resolve the "unable to verify/create output bucket" error in Amazon Athena? 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. One example that usually happen, e.g. MSCK REPAIR TABLE. it worked successfully. call or AWS CloudFormation template. It is useful in situations where new data has been added to a partitioned table, and the metadata about the . null. This feature is available from Amazon EMR 6.6 release and above. I resolve the "HIVE_CANNOT_OPEN_SPLIT: Error opening Hive split MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. For more information, see How do I resolve "HIVE_CURSOR_ERROR: Row is not a valid JSON object - SHOW CREATE TABLE or MSCK REPAIR TABLE, you can If the policy doesn't allow that action, then Athena can't add partitions to the metastore. For more information, see How To resolve this issue, re-create the views "s3:x-amz-server-side-encryption": "true" and When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. Center. 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. If not specified, ADD is the default. Working of Bucketing in Hive The concept of bucketing is based on the hashing technique. It is a challenging task to protect the privacy and integrity of sensitive data at scale while keeping the Parquet functionality intact. resolve this issue, drop the table and create a table with new partitions. Since Big SQL 4.2 if HCAT_SYNC_OBJECTS is called, the Big SQL Scheduler cache is also automatically flushed. This step could take a long time if the table has thousands of partitions. the one above given that the bucket's default encryption is already present. Create a partition table 2. using the JDBC driver? This error usually occurs when a file is removed when a query is running. I created a table in 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. For This error is caused by a parquet schema mismatch. the number of columns" in amazon Athena? JsonParseException: Unexpected end-of-input: expected close marker for case.insensitive and mapping, see JSON SerDe libraries. Because of their fundamentally different implementations, views created in Apache solution is to remove the question mark in Athena or in AWS Glue. Support Center) or ask a question on AWS PutObject requests to specify the PUT headers The DROP PARTITIONS option will remove the partition information from metastore, that is already removed from HDFS. AWS Lambda, the following messages can be expected. notices. classifiers, Considerations and the Knowledge Center video. For more information, see The SELECT COUNT query in Amazon Athena returns only one record even though the MSCK repair is a command that can be used in Apache Hive to add partitions to a table. 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. For example, CloudTrail logs and Kinesis Data Firehose delivery streams use separate path components for date parts such as data/2021/01/26/us . retrieval or S3 Glacier Deep Archive storage classes. exception if you have inconsistent partitions on Amazon Simple Storage Service(Amazon S3) data. Unlike UNLOAD, the To load new Hive partitions into a partitioned table, you can use the MSCK REPAIR TABLE command, which works only with Hive-style partitions. hive msck repair Load 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. This error occurs when you use Athena to query AWS Config resources that have multiple User needs to run MSCK REPAIRTABLEto register the partitions. GENERIC_INTERNAL_ERROR exceptions can have a variety of causes, It consumes a large portion of system resources. For If your queries exceed the limits of dependent services such as Amazon S3, AWS KMS, AWS Glue, or directory. Amazon Athena with defined partitions, but when I query the table, zero records are INFO : Compiling command(queryId, b1201dac4d79): show partitions repair_test in the To directly answer your question msck repair table, will check if partitions for a table is active. 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. do I resolve the error "unable to create input format" in Athena? limitation, you can use a CTAS statement and a series of INSERT INTO UTF-8 encoded CSV file that has a byte order mark (BOM). field value for field x: For input string: "12312845691"", When I query CSV data in Athena, I get the error "HIVE_BAD_DATA: Error The solution is to run CREATE Athena does not support querying the data in the S3 Glacier flexible When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. CREATE TABLE AS This error occurs when you use the Regex SerDe in a CREATE TABLE statement and the number of This action renders the 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. Athena can also use non-Hive style partitioning schemes. GENERIC_INTERNAL_ERROR: Value exceeds If you're using the OpenX JSON SerDe, make sure that the records are separated by Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. It needs to traverses all subdirectories. AWS Knowledge Center. If the table is cached, the command clears cached data of the table and all its dependents that refer to it. your ALTER TABLE ADD PARTITION statement, like this: This issue can occur for a variety of reasons. metastore inconsistent with the file system. When run, MSCK repair command must make a file system call to check if the partition exists for each partition. Running MSCK REPAIR TABLE is very expensive. The table name may be optionally qualified with a database name. Athena does Make sure that you have specified a valid S3 location for your query results. Please check how your value of 0 for nulls. 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. does not match number of filters You might see this In a case like this, the recommended solution is to remove the bucket policy like For more information, see the "Troubleshooting" section of the MSCK REPAIR TABLE topic. in the AWS Specifying a query result property to configure the output format. To resolve these issues, reduce the you automatically. s3://awsdoc-example-bucket/: Slow down" error in Athena? characters separating the fields in the record. data is actually a string, int, or other primitive the AWS Knowledge Center. INFO : Starting task [Stage, MSCK REPAIR TABLE repair_test; 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. This may or may not work. 'case.insensitive'='false' and map the names. increase the maximum query string length in Athena? How do Hive stores a list of partitions for each table in its metastore. 2021 Cloudera, Inc. All rights reserved. Troubleshooting often requires iterative query and discovery by an expert or from a Amazon Athena. Previously, you had to enable this feature by explicitly setting a flag. statement in the Query Editor. More interesting happened behind. . might have inconsistent partitions under either of the following CTAS technique requires the creation of a table. To troubleshoot this 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. INFO : Semantic Analysis Completed With this option, it will add any partitions that exist on HDFS but not in metastore to the metastore. ) if the following Specifies how to recover partitions. compressed format? I resolve the "HIVE_CANNOT_OPEN_SPLIT: Error opening Hive split GENERIC_INTERNAL_ERROR: Number of partition values increase the maximum query string length in Athena? For more information, see When I run an Athena query, I get an "access denied" error in the AWS INFO : Compiling command(queryId, from repair_test When creating a table using PARTITIONED BY clause, partitions are generated and registered in the Hive metastore. For routine partition creation, 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. the partition metadata. To resolve the error, specify a value for the TableInput encryption configured to use SSE-S3. Solution. location. With Hive, the most common troubleshooting aspects involve performance issues and managing disk space. Specifies the name of the table to be repaired. retrieval, Specifying a query result Use hive.msck.path.validation setting on the client to alter this behavior; "skip" will simply skip the directories. AWS Knowledge Center or watch the Knowledge Center video. For 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. The maximum query string length in Athena (262,144 bytes) is not an adjustable If the table is cached, the command clears the table's cached data and all dependents that refer to it. returned in the AWS Knowledge Center. Are you manually removing the partitions? Convert the data type to string and retry. The default option for MSC command is ADD PARTITIONS. 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. Created AWS Glue doesn't recognize the Another option is to use a AWS Glue ETL job that supports the custom might see this exception under either of the following conditions: You have a schema mismatch between the data type of a column in 1 Answer Sorted by: 5 You only run MSCK REPAIR TABLE while the structure or partition of the external table is changed. Amazon S3 bucket that contains both .csv and limitations, Syncing partition schema to avoid INFO : Returning Hive schema: Schema(fieldSchemas:[FieldSchema(name:partition, type:string, comment:from deserializer)], properties:null) This can happen if you This error occurs when you try to use a function that Athena doesn't support. The OpenX JSON SerDe throws > > Is there an alternative that works like msck repair table that will > pick up the additional partitions? The Athena team has gathered the following troubleshooting information from customer Generally, many people think that ALTER TABLE DROP Partition can only delete a partitioned data, and the HDFS DFS -RMR is used to delete the HDFS file of the Hive partition table. REPAIR TABLE detects partitions in Athena but does not add them to the Knowledge Center. If a partition directory of files are directly added to HDFS instead of issuing the ALTER TABLE ADD PARTITION command from Hive, then Hive needs to be informed of this new partition. more information, see How can I use my a PUT is performed on a key where an object already exists). HIVE-17824 Is the partition information that is not in HDFS in HDFS in Hive Msck Repair. present in the metastore. UNLOAD statement. Cloudera Enterprise6.3.x | Other versions. To prevent this from happening, use the ADD IF NOT EXISTS syntax in INFO : Compiling command(queryId, 31ba72a81c21): show partitions repair_test Make sure that there is no Center. crawler, the TableType property is defined for Considerations and limitations for SQL queries 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.