Rajesh KSV created HIVE-20906:
---------------------------------
Summary: Are Hive locks really ephemeral ?
Key: HIVE-20906
URL: https://issues.apache.org/jira/browse/HIVE-20906
Project: Hive
Issue Type: Bug
Reporter: Rajesh KSV
I am using Hive 2.3.3.
According to docs ([https://cwiki.apache.org/confluence/display/Hive/Locking]),
they are ephemeral. But in the Zookeeper and Hive source Code, they seemed to
be non-ephemeral.
I ran the following query in Hive.
*lock table discovery.defaultns*
When I see the lock in zookeeper, it doesn't look like ephemeral node.
[zk: localhost:2181(CONNECTED) 55] get
/hive_zookeeper_namespace/discovery/defaultns/LOCK-EXCLUSIVE-0000000000
hive_20181112191555_d6640955-2806-4fa7-9e52-30d04c377a04:1542030355565:EXPLICIT:lock
table discovery.defaultns exclusive:10.33.222.139
cZxid = 0x2400296808
ctime = Mon Nov 12 19:15:55 IST 2018
mZxid = 0x2400296808
mtime = Mon Nov 12 19:15:55 IST 2018
pZxid = 0x2400296808
cversion = 0
dataVersion = 0
aclVersion = 0
*ephemeralOwner = 0x0*
dataLength = 134
numChildren = 0
Also in the code -
[https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/lockmgr/HiveTxnManagerImpl.java],
the lock is KeepAlive/PERSISTENT and not EPHIMERAL .
*HiveLock lck = lockMgr.lock(new HiveLockObject(tbl, lockData), mode, true);*
Is it a bug or am I missing something? Thanks!
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
