[HIVE-7256] HiveTxnManager should be stateless

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 0.13.1
• Component/s: Locking
• Assignee: Alan Gates
• Reporter: Eugene Koifman
• Created: 19/Jun/14 04:22
• Updated: 29/Oct/15 00:08
• Resolved: 29/Oct/15 00:08

Description

In order to integrate HCat with Hive ACID, we should be able to create an instance of HiveTxnManager and use it to acquire locks, and release locks from a different instance of HiveTxnManager.

One use case where this shows up is when a job using HCat is retried, since calls to TxnManager are made from the jobs OutputCommitter.

Another, is HCatReader/Writer. For example, TestReaderWriter, calls setupJob() from one instance of OutputCommitterContainer and commitJob() from another instance. The 2nd case is perhaps better solved by ensuring there is only 1 instance of OutputCommitterContainer.

Issue Links

• blocks: HIVE-6207 Integrate HCatalog with locking
• is blocked by: HIVE-7249 HiveTxnManager.closeTxnManger() throws if called after commitTxn()