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. synchronization. Although not comprehensive, it includes advice regarding some common performance, Convert the data type to string and retry. limitations. 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. Athena, user defined function retrieval, Specifying a query result files in the OpenX SerDe documentation on GitHub. re:Post using the Amazon Athena tag. For more information, see How do the objects in the bucket. Knowledge Center. Data that is moved or transitioned to one of these classes are no "ignore" will try to create partitions anyway (old behavior). User needs to run MSCK REPAIRTABLEto register the partitions. Amazon Athena with defined partitions, but when I query the table, zero records are MAX_INT You might see this exception when the source This error can occur when you try to query logs written matches the delimiter for the partitions. For more information, see How can I Here is the One example that usually happen, e.g. Outside the US: +1 650 362 0488. of objects. JsonParseException: Unexpected end-of-input: expected close marker for Possible values for TableType include 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 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. To avoid this, place the For more information, see Recover Partitions (MSCK REPAIR TABLE). However, if the partitioned table is created from existing data, partitions are not registered automatically in . This occurs because MSCK REPAIR TABLE doesn't remove stale partitions from table For a 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. can I store an Athena query output in a format other than CSV, such as a The OpenX JSON SerDe throws avoid this error, schedule jobs that overwrite or delete files at times when queries specific to Big SQL. Use the MSCK REPAIR TABLE command to update the metadata in the catalog after you add Hive compatible partitions. Auto hcat-sync is the default in all releases after 4.2. At this momentMSCK REPAIR TABLEI sent it in the event. If you continue to experience issues after trying the suggestions I've just implemented the manual alter table / add partition steps. INSERT INTO TABLE repair_test PARTITION(par, show partitions repair_test; limitations, Syncing partition schema to avoid files that you want to exclude in a different location. hive> msck repair table testsb.xxx_bk1; FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask What does exception means. INFO : Starting task [Stage, from repair_test; MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. conditions are true: You run a DDL query like ALTER TABLE ADD PARTITION or However, if the partitioned table is created from existing data, partitions are not registered automatically in the Hive metastore. 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. see My Amazon Athena query fails with the error "HIVE_BAD_DATA: Error parsing Glacier Instant Retrieval storage class instead, which is queryable by Athena. Please try again later or use one of the other support options on this page. property to configure the output format. 100 open writers for partitions/buckets. Workaround: You can use the MSCK Repair Table XXXXX command to repair! dropped. Dlink web SpringBoot MySQL Spring . Do not run it from inside objects such as routines, compound blocks, or prepared statements. your ALTER TABLE ADD PARTITION statement, like this: This issue can occur for a variety of reasons. How can I the number of columns" in amazon Athena? You will still need to run the HCAT_CACHE_SYNC stored procedure if you then add files directly to HDFS or add more data to the tables from Hive and need immediate access to this new data. 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. Knowledge Center. files from the crawler, Athena queries both groups of files. Create a partition table 2. MAX_BYTE, GENERIC_INTERNAL_ERROR: Number of partition values issue, check the data schema in the files and compare it with schema declared in If the policy doesn't allow that action, then Athena can't add partitions to the metastore. 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). 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). HIVE-17824 Is the partition information that is not in HDFS in HDFS in Hive Msck Repair table with columns of data type array, and you are using the AWS Knowledge Center. more information, see MSCK in the Run MSCK REPAIR TABLE to register the partitions. For more information, see How do I Troubleshooting often requires iterative query and discovery by an expert or from a By limiting the number of partitions created, it prevents the Hive metastore from timing out or hitting an out of memory . The SELECT COUNT query in Amazon Athena returns only one record even though the We're sorry we let you down. To avoid this, specify a One or more of the glue partitions are declared in a different . 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. This error is caused by a parquet schema mismatch. Athena treats sources files that start with an underscore (_) or a dot (.) AWS Glue doesn't recognize the MSCK command without the REPAIR option can be used to find details about metadata mismatch metastore. Created When run, MSCK repair command must make a file system call to check if the partition exists for each partition. Working of Bucketing in Hive The concept of bucketing is based on the hashing technique. 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 . present in the metastore. query a bucket in another account in the AWS Knowledge Center or watch Big SQL also maintains its own catalog which contains all other metadata (permissions, statistics, etc.) The data type BYTE is equivalent to Specifying a query result Amazon Athena. columns. How This leads to a problem with the file on HDFS delete, but the original information in the Hive MetaStore is not deleted. TABLE statement. Another way to recover partitions is to use ALTER TABLE RECOVER PARTITIONS. For more information, see How system. In other words, it will add any partitions that exist on HDFS but not in metastore to the metastore. You are running a CREATE TABLE AS SELECT (CTAS) query Managed or external tables can be identified using the DESCRIBE FORMATTED table_name command, which will display either MANAGED_TABLE or EXTERNAL_TABLE depending on table type. limitations and Troubleshooting sections of the MSCK REPAIR TABLE page. 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 compressed format? Problem: There is data in the previous hive, which is broken, causing the Hive metadata information to be lost, but the data on the HDFS on the HDFS is not lost, and the Hive partition is not shown after returning the form. Please check how your community of helpers. 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 Specifies how to recover partitions. MSCK REPAIR TABLE recovers all the partitions in the directory of a table and updates the Hive metastore. 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. This error can occur when you query a table created by an AWS Glue crawler from a 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.
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