Chaoyu Tang created HIVE-12248:
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Summary: The rawStore used in DBTokenStore should be thread-safe
Key: HIVE-12248
URL: https://issues.apache.org/jira/browse/HIVE-12248
Project: Hive
Issue Type: Bug
Components: Authentication
Reporter: Chaoyu Tang
Assignee: Chaoyu Tang
A non-thread-safe implementation of RawStore, particularly ObjectStore, set in
DBTokenStore is being shared by multi-threads, which causes the race condition
in DataNuclues to access the backend DB.
The DN PersistenceManager(PM) in ObjectStore is not thread safe, so
DBTokenStore should use a ThreadLocal ObjectStore.
Following errors might be root caused by the race condition in DN PM.
{code}
Object of type "org.apache.hadoop.hive.metastore.model.MDelegationToken" is
detached. Detached objects cannot be used with this operation.
org.datanucleus.exceptions.ObjectDetachedException: Object of type
"org.apache.hadoop.hive.metastore.model.MDelegationToken" is detached. Detached
objects cannot be used with this operation.
at
org.datanucleus.ExecutionContextImpl.assertNotDetached(ExecutionContextImpl.java:5728)
at
org.datanucleus.ExecutionContextImpl.retrieveObject(ExecutionContextImpl.java:1859)
at
org.datanucleus.ExecutionContextThreadedImpl.retrieveObject(ExecutionContextThreadedImpl.java:203)
at
org.datanucleus.api.jdo.JDOPersistenceManager.jdoRetrieve(JDOPersistenceManager.java:605)
at
org.datanucleus.api.jdo.JDOPersistenceManager.retrieveAll(JDOPersistenceManager.java:693)
at
org.datanucleus.api.jdo.JDOPersistenceManager.retrieveAll(JDOPersistenceManager.java:713)
at
org.apache.hadoop.hive.metastore.ObjectStore.getAllTokenIdentifiers(ObjectStore.java:6517)
{code}
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