35 | Connection is closed (error 526). Exception in thread "main" [ObjectDB 2.2.7_08] javax.persistence.PersistenceException Connection ... (testNodes.java:308) Caused by: com.objectdb.o.UserException: Connection is closed at com.objectdb.o.MSG ... 2.2.7_08] javax.persistence.PersistenceException Connection is closed (error 526) at com |
35 | Connections poolHi! Does ObjectDB keeps and reuses a pool of connections as MySQL JDBC driver does? I mean ... . Every EntityManagerFactory instance manages a pool of connections and reuses them when it creates new EntityManager instances. By default the maximum connection pool size is 50. You can change it in |
34 | Many connections possible? and will it makes problem in future?My questions is about : 1-) Can objectdb server handle 200.000+ connections at the same time concurrently ? Does it have queue and cache ? 2-) is it dangerous to use that system on many online users ... load balancing tools. ObjectDB doesn't limit the maximum number of allowed concurrent connections |
34 | connect with serverhow to connect the data base on a remote server and share odbc in object db eng.ahmed ahmed how to publish the JPA database on server and make client in the network can share the data base i want to know the right connection string. i used "Map<String, String> properties = new HashMap<String |
34 | unable to connect to remote server using VPNI am trying to connect to remote server using VPN using user1 However, the server terminated the connection and emitted below in the server log. --------------------- [2018-04-14 13:13:33 #2 server] java.lang.ClassCastException: java.base/[Ljava.lang.Object; cannot be cast to [[B at com.objectdb.o |
34 | Retrieving Metamodel without connectionHello! I use Spring Data JPA. It uses the Metamodel to create repository beans. This triggers a connection to the ObjectDB server. It happens on every start of the Context. If it fails ... restart tomcat. Other JPA providers are able to fetch the Metamodel without connecting to the DB. I |
7 | ObjectDB Object Database Features. Up to 9,223,372,036,854,775,808 entity objects per database file. Unlimited database connections (limited ... . Connection Pooling Automatic connection pool managed by EntityManagerFactory. Configurable - minimum/maximum connections and timeout. Caching L1 entity object cache (per EntityManager). L2 shared entity data |
7 | Close() Method of EMF throwing "PersistenceException: Connection is closed" on first attempt to close. ObjectDb servers at the same time? com.objectdb.o._PersistenceException: Connection is closed due to UserException: Connection is closed com.objectdb.o._PersistenceException:45 com.objectdb.o.JPE:145 com ... , because if the database connection is closed, further attempts to close it are not necessary. support Support |
7 | Retrieving Metamodel without Connection a connection to the ObjectDB server. It happens on every start of the Context. If it fails ... restart tomcat. Other JPA providers are able to fetch the Metamodel without connecting to the DB. I ... getMetmodel works. If invoked before first connection to the server - the persistence unit model is analyzed locally on the client side. support Support |
0 | [ODB1] Chapter 9 - ObjectDB Explorer To open a connection to a remote database using client-server mode (supported only by ObjectDB ... the Open dialog you have to fill in the host, port, username and password of the remote connection ... " menu command to close a local database file or a connection to a remote database file. The Tabbed |
