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Carl Steinbach commented on HIVE-3469: -------------------------------------- It looks like createDefaultDB() (which calls createDefaultDB_core()) is already synchronized. Any idea why this doesn't solve the problem? > 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira