ObjectDB Database Search

Internal ObjectDB error by read the primary key

Failed to read the value of field using reflection (error 363)

create the readings in one call and I try to read them in another call. I checked the database and all the entities are created (document and readings ) but when I try to get the collection of readings null is returned. I have tried to clear the entity manager in the second call to make sure the reading

and roll back. T1 T2 ---------------------------------------------------------- READ (A) version=1 value=0 | READ (B) version=1 value=0 | | READ (A) version=1 value=0 | READ (B) version=1 value=0 | B ... Thread[Thread-2,5,main] READ   A1 version=1 value=0 Thread[Thread-2,5,main] READ   B2 version=1

.OPTIMISTIC_FORCE_INCREMENT . The lock mode type values LockModeType. READ and LockModeType.WRITE are synonyms ... phenomena can occur: P1 (Dirty read ): Transaction T1 modifies a row. Another transaction T2 then reads ... so before or after T2 commits. P2 (Non-repeatable read ): Transaction T1 reads a row

.InternalException: Error reading UTF string at com.objectdb.o.BYR.U(BYR.java:1217) at com.objectdb.o.BYR.U(BYR.java ... ) WARNING: javax.ejb.EJBException: Error reading UTF string at com.sun.ejb.containers ... .run(Thread.java:829) Caused by: com.objectdb.o.InternalException: Error reading UTF string at com

.URIReader. read (URIReader.java:84)         at image.URIReader.main ... 613) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:277) at image.URIReader. read (URIReader.java:82 ... Your code contains file reading operations that are not related to ObjectDB and may cause the problem

, do you know why? Caused by: com.objectdb.o._PersistenceException: Failed to read from file '/tmp ... .objectdb.o.UserException: Failed to read from file '/tmp/objectdb_2306457094224783100/pages0.dat ... .lang.RuntimeException: Failed to read from file '/tmp/objectdb_9120972825587144595/pages0.dat' '/tmp

.SocketInputStream.socketRead(SocketInputStream.java:116) at java.net.SocketInputStream. read (SocketInputStream.java:171) at java.net.SocketInputStream. read (SocketInputStream.java:141) at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) at java.io.BufferedInputStream. read (BufferedInputStream.java:265

when data is read from the database and when data is committed into the database. Since: JPA 2.0 ... insert into cache. Since: JPA 2.0 REFRESH Insert/update entity data into cache when read from database and when committed into database. Forces refresh of cache for items read from database. Since: JPA

JPA Enum Constant in javax.persistence.CacheStoreMode REFRESH Insert/update entity data into cache when read from database and when committed into database. Forces refresh of cache for items read from database. Since: JPA 2.0

JPA Enum Constant in javax.persistence.CacheStoreMode USE Insert entity data into cache when read from database and insert/update entity data when committed into database: this is the default behavior. Does not force refresh of already cached items when reading from database. Since: JPA 2.0

. One is to stupidly commit the transaction after a certain number of read accesses (every 10000 read access ... updates to the database or it is read only. If it is a read only operation, do you really need commit ... for posting questionable code snippets. I have repaired it. In this scenario the data is only read

JPA Enum Constant in javax.persistence.CacheRetrieveMode USE Read entity data from the cache: this is the default behavior. Since: JPA 2.0

: get data directly from the database. Since: JPA 2.0 USE Read entity data from the cache

.socketRead0(Native Method) at java.net.SocketInputStream. read (SocketInputStream.java:129) at java ... (BufferedInputStream.java:256) at java.io.BufferedInputStream. read (BufferedInputStream.java:313) at com ... . The message size going into the queue is not large - around 4k at most. Each read /write operation

getReadOnly () Gets the value for read -only for this PMF. Indicates whether the datastore is read -only or ... (boolean flag) Sets the value for whether the datastore is to be considered read -only. ReadOnly ... are: read -uncommitted read -committed repeatable- read snapshot serializable Parameters: level

() If true , allows persistent instances to be read without a transaction active. Return: the value ... an implementation but are not standard. Standard values in order of low to high are: read -uncommitted read -committed repeatable- read snapshot serializable Parameters: level - the transaction isolation level

JDO Interface Constants Constant values used in JDO. Since: JDO 2.1 Public Static Fields TX_ READ _COMMITTED Transaction isolation level representing the requirement to read committed data ... () Since: JDO 2.2 TX_ READ _UNCOMMITTED Transaction isolation level representing the ability to read

from low to high are: read -uncommitted read -committed repeatable- read snapshot serializable ... _ READ _UNCOMMITTED Constants.TX_ READ _COMMITTED Constants.TX_REPEATABLE_ READ Constants.TX_SNAPSHOT Constants.TX_SERIALIZABLE Since: JDO 2.2

values in order of low to high are: read -uncommitted read -committed repeatable- read snapshot ... _ READ _UNCOMMITTED Constants.TX_ READ _COMMITTED Constants.TX_REPEATABLE_ READ Constants.TX_SNAPSHOT Constants.TX_SERIALIZABLE Since: JDO 2.2

.GetDataStoreConnection javax.jdo.option.UnconstrainedQueryVariables javax.jdo.option.TransactionIsolationLevel. read -uncommitted javax.jdo.option.TransactionIsolationLevel. read -committed javax.jdo.option.TransactionIsolationLevel.repeatable- read javax.jdo.option.TransactionIsolationLevel.snapshot javax.jdo.option

JDO Method in javax.jdo.PersistenceManagerFactory boolean getReadOnly () Gets the value for read -only for this PMF. Indicates whether the datastore is read -only or writable. Return: the readOnly setting. See Also: setReadOnly Since: JDO 2.2

readExternal (ObjectInput in) Read this object. Read the superclass first. Parameters: in - the input

JDO Method in javax.jdo.identity.IntIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

(ObjectInput in) Read this object. Read the superclass first. Parameters: in - the input

JDO Method in javax.jdo.identity.CharIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

JDO Method in javax.jdo.identity.ObjectIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

Since: JDO 1.0 void readExternal (ObjectInput in) Read this object. Read the superclass first

JDO Method in javax.jdo.identity.LongIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

Since: JDO 1.0 void readExternal (ObjectInput in) Read this object. Read the superclass first

JDO Method in javax.jdo.identity.ByteIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

;in) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0 String

JDO Method in javax.jdo.identity.ShortIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

void readExternal (ObjectInput in) Read this object. Read the superclass first. Parameters: in

JDO Method in javax.jdo.identity.StringIdentity void readExternal (   ObjectInput in ) Read this object. Read the superclass first. Parameters: in - the input Since: JDO 1.0

Since: JDO 1.0 void readExternal (ObjectInput in) Read this object. Read the superclass first

, and the StateManager approves the change, then the jdoFlags field will be reset to READ _WRITE_OK

JDO Method in javax.jdo.PersistenceManagerFactory void setReadOnly (   boolean flag ) Sets the value for whether the datastore is to be considered read -only. ReadOnly set to false specifies that no updates can be performed to the datastore, and if updates are attempted

; persistent instances read in data store transactions; and persistent instances modified in

JDO Method in javax.jdo.Transaction boolean getNontransactionalRead () If true , allows persistent instances to be read without a transaction active. Return: the value of the nontransactionalRead property Since: JDO 1.0

JDO Method in javax.jdo.Transaction void setNontransactionalRead (   boolean nontransactionalRead ) If true , allow persistent instances to be read without a transaction active. If an implementation does not support this option, a JDOUnsupportedOptionException is thrown. Parameters

represents exceptions caused by an attempt to update a datastore when the PMF was created as " read

JDO Static Field in javax.jdo.Constants TX_SNAPSHOT Transaction isolation level representing the requirement to keep a snapshot for reading data. See Also: PersistenceManagerFactory.getTransactionIsolationLevel () Transaction.getIsolationLevel () Since: JDO 2.2

is restored to the state before the first change in the transaction. For persistent instances read in

instances read in data store transactions; and persistent instances modified in optimistic transactions

code. Since: JDO 1.0 void readExternal (ObjectInput in) Read from the input stream. Creates a new

, and the StateManager approves the change, then the jdoFlags field will be reset to READ _WRITE_OK. If the parameter

JDO Method in javax.jdo.identity.SingleFieldIdentity void readExternal (   ObjectInput in ) Read from the input stream. Creates a new instance with the target class name set Since: JDO 1.0

the transaction. For persistent instances read in optimistic transactions, this method allows the application