[HIVE-13002] Hive object is not thread safe, is shared via a threadlocal and thus should not be passed around too much - part 1

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.1.0
• Assignee: Sergey Shelukhin
• Reporter: Sergey Shelukhin
• Created: 04/Feb/16 20:39
• Updated: 04/Aug/16 17:13
• Resolved: 02/Mar/16 01:41

Description

Discovered in some q test run:

 TestCliDriver.testCliDriver_insert_values_orig_table:123->runTest:199 Unexpected exception java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926)
	at java.util.HashMap$EntryIterator.next(HashMap.java:966)
	at java.util.HashMap$EntryIterator.next(HashMap.java:964)
	at org.apache.hadoop.hive.ql.metadata.Hive.dumpAndClearMetaCallTiming(Hive.java:3412)
	at org.apache.hadoop.hive.ql.Driver.dumpMetaCallTimingWithoutEx(Driver.java:574)
	at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1722)
	at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1342)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1113)
	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1101)

Issue Links

• relates to: HIVE-13194 Hive object is not thread safe, is shared via a threadlocal and thus should not be shared via session - part 2
• relates to: HIVE-13592 metastore calls map is not thread safe
• relates to: HIVE-14129 Execute move tasks in parallel
• links to: RB