rohithsharma created HIVE-3469:
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Summary: When new hive cluster is started, hive jdbc client hangs.
Key: HIVE-3469
URL: https://issues.apache.org/jira/browse/HIVE-3469
Project: Hive
Issue Type: Bug
Components: Clients, Metastore, Thrift API
Environment: Hadoop-2.0.1 + Hive-0.9.0
Reporter: rohithsharma
The scenario is as follows :
For the new hive cluster , when multiple hive client is getting the connection
for hive server , there are 3 problems in metastore , hive client.
1. Since the derby is booted at first connection, multiple client try to
create database.One of the client succeed and another one throw exception
because of *unique primary constraint* in metatables.
2. Once the Runtime exception is throw, the hive client which is made
connection request will hang forever.
3. Potentially "ConcurrentModificationException" is thrown by JDOQuery.
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