[HIVE-10241] ACID: drop table doesn't acquire any locks

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: 1.0.0
• Component/s: Transactions
• Assignee: Eugene Koifman
• Reporter: Eugene Koifman
• Created: 07/Apr/15 18:54
• Updated: 09/Apr/15 17:55
• Resolved: 09/Apr/15 17:55

Description

with Hive configured to use DbTxnManager, in DbTxnManager.acquireLocks() both plan.getInputs() and plan.getOutputs() are empty when "drop table foo" is executed and thus no locks are acquired. We should be acquiring X locks to make sure any readers of this table don't get data wiped out while read is in progress.