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17

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

it tries to delete temporary files of other processes that are not locked (active temporary files are always locked). The cause of the reported issue is unclear. We added in build 2.6.0_04 an ability ... that directory a lock file, lock.lck, is created and hold for the life of the process (or class loader
4

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
4

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
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
3

javax.persistence.Version

javax.persistence Annotation Version Target: Fields (including property get methods) Specifies the version field or property of an entity class that serves as its optimistic lock value. The version is used to ensure integrity when performing the merge operation and for optimistic concurrency
3

LockModeType.PESSIMISTIC_WRITE

Enum Constant javax.persistence.LockModeType PESSIMISTIC_WRITE Pessimistic write lock. Since: JPA 2.0
3

LockModeType.PESSIMISTIC_READ

Enum Constant javax.persistence.LockModeType PESSIMISTIC_READ Pessimistic read lock. Since: JPA 2.0
3

LockModeType.PESSIMISTIC_FORCE_INCREMENT

Enum Constant javax.persistence.LockModeType PESSIMISTIC_FORCE_INCREMENT Pessimistic write lock, with version update. Since: JPA 2.0
3

javax.persistence.PessimisticLockException

Interfaces: Serializable Thrown by the persistence provider when an pessimistic locking conflict occurs
0

setOptimistic(optimistic)

Method javax.jdo.Transaction void setOptimistic( boolean optimistic ) Optimistic transactions do not hold data store locks until commit time. If an implementation does not support this option, a JDOUnsupportedOptionException is thrown. Parameters: optimistic - the value of the Optimistic flag. Since: JDO 1.0

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Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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