Lock contention issues can be frustrating problems to investigate and debug. Repeat step 2 and step 3 every 4 hours for 200 different tables. Welcome to the Hive Community, where you will find the answers to any questions about Hive smart heating, lighting, camera products and more. To enable Table Lock manager, you have to set the following properties in the hive-site.xml file. Step2: New data will be inserted in to HIVE Table. Hi Andrew, Thanks for reply. We have tried using presto and hive … Step1: One time full data will be loaded into HIVE Table. xecution has failed. The common causes are: The offensive transaction is not fast enough to commit or rollback the transaction within innodb_lock_wait_timeout duration. Closed; Activity. Service Status Page > … and you can release the lock with. Issue Links. SCHEMA and DATABASE are interchangeable – they mean the same thing. Attachments. HIVE-10483 insert overwrite partition deadlocks on itself with DbTxnManager. There are few properties to set to make a Hive table support ACID properties and to support UPDATE ,INSERT ,and DELETE as in SQL. ; The offensive transaction is waiting for row lock to be released by another transaction. Workaround When using --hive-import with --as-parquetfile , users must also provide --external-table-dir with a fully qualified location of the table: But anytime a database system is involved, the potential exists for locking to cause concurrency problems. Properties to set to create ACID table: But, sys.dm_tran_locks and sys.dm_os_waiting_tasks returns information about current tasks (waiting or locked). Before blaming the database system (as is the usual response), try to answer the following questions to help identify the cause of the locking problems: Status pages are updated to help you find out more and understand how your service may be affected if we experience any problems. SHOW LOCKS displays the locks on a table or partition. On the computer that has 16 or more CPUs, only table objects use a partitioned lock scheme. Conditions to create a ACID table in Hive. stack trace: org.apache.hadoop.hive.ql.lockmgr.LockException: No record of lock lockid:2227707 could be found, may have timed Select data from HIVE table. duplicates. See Hive Concurrency Model for information about locks. Therefore, the larger the number of database locks, the longer it takes for SQL Server to obtain a lock on the database. Table db.table failed strict managed table checks due to the following reason: Table is marked as a managed table but is not transactional. However, the database locks are not partitioned. The table should be stored as ORC file .Only ORC format can support ACID prpoperties for now 2. So, is there any way so that we can find out which query was running when we faced that lock issue. People. The above simply means the transaction has reached the innodb_lock_wait_timeout while waiting to obtain an exclusive lock which defaults to 50 seconds. then the previous request will be executed (by default the request is executed x times every 60 seconds (hive.lock.sleep.between.retries)) Locks (hive.lock.numretries) are tried 100 times, unlocks (hive.unlock.numretries) 10 times. The table must be bucketed. 1. But task of loading data runs in midnight and we will get to know it in the morning. Step3: Rows will be deleted from HIVE Table. SHOW LOCKS (DATABASE|SCHEMA) is supported from Hive 0.13 for DATABASE (see HIVE-2093) and Hive 0.14 for SCHEMA (see HIVE-6601). CREATE TABLE test(id int, msg string) PARTITIONED BY ... i think it has dead lock when insert overwrite table from it self. Most applications do not experience any problems that are caused by this design. hive> unlock table my_table; OK Time taken: 1.126 seconds. hive.support.concurrency Enable Hive's Table Lock Manager Service true hive.zookeeper.quorum Zookeeper quorum used by Hive's Table Lock …