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https://cwiki.apache.org/confluence/display/Hive/Locking
The default Hive behavior will not be changed, and concurrency will not be supported. Turn Off Concurrency. You can turn off concurrency by setting the following variable to false: hive.support.concurrency. Debugging. You can see the locks on a table by issuing the following command: SHOW LOCKS <TABLE_NAME>; SHOW LOCKS <TABLE_NAME> EXTENDED;Lock Compatibility: Existing Lock
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties
Configuration properties prefixed by 'hikari' or 'dbcp' will be propagated as is to the connectionpool implementation by Hive. Jdbc connection url, username, password and connection pool maximum connections are exceptions which must be configured with their special Hive Metastore configuration properties.
https://acadgild.com/blog/acid-transactions-in-hive
In this blog post, we have explained about the row-level transactions available in Hive. This post will provide you a good idea of how to implement the row-level transactions on the Hive table.. Before beginning with the transactions in Hive, let’s look at the ACID properties, which are vital for any transaction.
https://grokbase.com/t/hive/user/158n0vtdwj/hive-concurrency-support
Aug 21, 2015 · Elliot West I presume you mean "into different partitions of a table at the same time"? This should be possible. It is certainly supported by the streaming API, which is probably where you want to look if you need to insert large volumes …
https://grokbase.com/t/hive/user/123vbezvb7/hive-server-concurrency-question
Mar 27, 2012 · Abhishek Pratap Singh AFAIK hive does not support concurrency however Multiple connection can be made to HiveServer. Hive or i should say Hadoop is write once and read multiple architecture. Hive does not have a build in support for DELETE OR UPDATE.
https://stackoverflow.com/questions/30556396/hive-update-and-delete
These configuration parameters must be set appropriately to turn on transaction support in Hive: hive.support.concurrency – true hive.enforce.bucketing – true hive.exec.dynamic.partition.mode – nonstrict hive.txn.manager – org.apache.hadoop.hive.ql.lockmgr.DbTxnManager hive.compactor.initiator.on – true (for …
https://www.ericlin.me/2015/05/how-table-locking-works-in-hive/
1. hive.support.concurrency is not set to “true” ... Cloudera still considers this feature is experimental and currently does not support ACID in CDH. Normally currently users do not use manual locking on Hive tables, because Hive queries themselves will take care of that automatically. However, if user decides for whatever reason, he/she ...
https://community.cloudera.com/t5/Support-Questions/what-is-the-behaviour-of-select-during-an-insert-in-HIVE/td-p/182443
Hi, In my organization, Hive is used with the hive.support.concurrency setted to false. I am wondering what are the consequences about inserting datas during a select (and vice versa). At insert, I think the table's metadatas are updated at the very end of the Map/Reduce job. Thus, a select should b...
https://issues.apache.org/jira/browse/HIVE-9169
The test cases lock1 lock2 lock3 lock4 are failing because the flag hive.support.concurrency is set to false in the hive-site.xml for the spark tests. This value was set to true in trunk with HIVE-1293 when these test cases were introduced to Hive. After setting the value to true and generating the output files, the test cases are successful.
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