About lock

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JPA Doc
6

javax.persistence.OptimisticLockException

Interfaces: Serializable Thrown by the persistence provider when an optimistic locking conflict occurs ... .lock(Object, LockModeType) EntityManager.lock(Object, LockModeType, java.util.Map
JPA Doc
5

getLockMode()

Method javax.persistence.Query LockModeType getLockMode() Get the current lock mode for the query. Returns: lock mode Throws: IllegalStateException - if the query is found not to be a Java Persistence query language SELECT query or a Criteria API query Since: JPA 2.0
JPA Doc
5

getLockMode(entity)

Method javax.persistence.EntityManager LockModeType getLockMode(   Object entity ) Get the current lock mode for the entity instance. Parameters: entity - entity instance Returns: lock mode Throws: TransactionRequiredException - if there is no transaction IllegalArgumentException - if the instance
JPA Doc
5

javax.persistence.NamedQuery

value: {} Since: JPA 1.0 LockModeType lockMode (Optional) The lock mode type to use in query execution. (Optional) The lock mode type to use in query execution. If a lockMode other than LockModeType
JPA Doc
5

setLockMode(lockMode)

Method javax.persistence.Query Query setLockMode(   LockModeType lockMode ) Set the lock mode type to be used for the query execution. Parameters: lockMode - lock mode Returns: the same query instance Throws: IllegalStateException - if the query is found not to be a Java Persistence query language SELECT query or a Criteria API query Since: JPA 2.0
JPA Doc
5

setLockMode(lockMode)

Method javax.persistence.TypedQuery TypedQuery setLockMode(   LockModeType lockMode ) Set the lock mode type to be used for the query execution. Parameters: lockMode - lock mode Returns: the same query instance Throws: IllegalStateException - if the query is found not to be a Java Persistence
Issue
4

Blocked by find

blocked: 109 Total waited: 80 Stack trace: com.objectdb.o.PGC.C(PGC.java:484) - locked java ... .find(EMImpl.java:551) - locked com.objectdb.jdo.PMImpl@ae89a com.objectdb.jpa.EMImpl.find ... (ObjectDbInstanceContainer.java:108) - locked rbccm.felix.objectdb.workflow.ObjectDbInstanceContainer@9c71a4 rbccm
Forum
3

Attempt to open a non existing file '/tmp/objectdb_xxxx/SortQueryItr_6.mrg'

temporary files of other processes that are not locked (active temporary files are always locked ... the process of each temporary directory. In that directory a lock file, lock.lck, is created and hold ... of a process, an attempt to delete lock.lck is made. It should fail if the process is still running
Forum
3

Degrading performance overtime

to see considerable degrade in performance caused internal objectdb locking: "pdncrttorfo42-WSAgent-1 ... ) - waiting to lock <64c56ec3> (a com.objectdb.o.PGC) owned by "ODB-FileWriter" t@116 at com ... .ah(SFL.java:998) - locked <75608da2> (a com.objectdb.o.LFL) at com.objectdb.o.MST.ah(MST.java:1746
JDO Doc
3

getOptimistic()

Method javax.jdo.Transaction boolean getOptimistic() Optimistic transactions do not hold data store locks until commit time. Returns: the value of the Optimistic property. Since: JDO 1.0