我正在使用H2 database 1.3.162和OpenJPA 2.1.1針對用Java編寫的小型桌面應用程序。org.apache.openjpa.lib.jdbc.ReportingSQLException:連接中斷:「會話關閉」
出於某種原因,我在隨機的我的代碼的地方得到以下異常。
Caused by: org.apache.openjpa.lib.jdbc.ReportingSQLException: Connection is broken: "session closed" [90067-162] {SELECT COUNT(t0.id) FROM Visitor t0 WHERE (t0.EngineId = ?)} [code=90067, state=90067]
at org.apache.openjpa.lib.jdbc.LoggingConnectionDecorator.wrap(LoggingConnectionDecorator.java:281)
at org.apache.openjpa.lib.jdbc.LoggingConnectionDecorator.wrap(LoggingConnectionDecorator.java:261)
at org.apache.openjpa.lib.jdbc.LoggingConnectionDecorator.access$000(LoggingConnectionDecorator.java:72)
at org.apache.openjpa.lib.jdbc.LoggingConnectionDecorator$LoggingConnection.prepareStatement(LoggingConnectionDecorator.java:313)
at org.apache.openjpa.lib.jdbc.DelegatingConnection.prepareStatement(DelegatingConnection.java:155)
at org.apache.openjpa.lib.jdbc.ConfiguringConnectionDecorator$ConfiguringConnection.prepareStatement(ConfiguringConnectionDecorator.java:158)
at org.apache.openjpa.lib.jdbc.DelegatingConnection.prepareStatement(DelegatingConnection.java:155)
at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$RefCountConnection.prepareStatement(JDBCStoreManager.java:1653)
at org.apache.openjpa.lib.jdbc.DelegatingConnection.prepareStatement(DelegatingConnection.java:144)
at org.apache.openjpa.jdbc.sql.SQLBuffer.prepareStatement(SQLBuffer.java:561)
at org.apache.openjpa.jdbc.sql.SQLBuffer.prepareStatement(SQLBuffer.java:541)
at org.apache.openjpa.jdbc.sql.SelectImpl.prepareStatement(SelectImpl.java:479)
at org.apache.openjpa.jdbc.sql.SelectImpl.execute(SelectImpl.java:420)
at org.apache.openjpa.jdbc.sql.SelectImpl.execute(SelectImpl.java:391)
at org.apache.openjpa.jdbc.sql.LogicalUnion$UnionSelect.execute(LogicalUnion.java:427)
at org.apache.openjpa.jdbc.sql.LogicalUnion.execute(LogicalUnion.java:230)
at org.apache.openjpa.jdbc.sql.LogicalUnion.execute(LogicalUnion.java:220)
at org.apache.openjpa.jdbc.kernel.SelectResultObjectProvider.open(SelectResultObjectProvider.java:94)
at org.apache.openjpa.kernel.QueryImpl$PackingResultObjectProvider.open(QueryImpl.java:2070)
at org.apache.openjpa.kernel.QueryImpl.singleResult(QueryImpl.java:1320)
at org.apache.openjpa.kernel.QueryImpl.toResult(QueryImpl.java:1242)
at org.apache.openjpa.kernel.QueryImpl.execute(QueryImpl.java:1007)
我persistence.xml
很簡單,沒有什麼特別的真
<persistence-unit name="openjpa" transaction-type="RESOURCE_LOCAL">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<class>com.mine.reporting.data.IpInfo</class>
<properties>
<property name="openjpa.ConnectionURL" value="jdbc:h2:database"/>
<property name="openjpa.ConnectionDriverName" value="org.h2.Driver"/>
<property name="openjpa.jdbc.DBDictionary" value="org.apache.openjpa.jdbc.sql.H2Dictionary"/>
<property name="openjpa.ConnectionUserName" value="sa"/>
<property name="openjpa.ConnectionPassword" value=""/>
<property name="openjpa.Log" value="DefaultLevel=WARN, Tool=INFO"/>
<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>
</properties>
</persistence-unit>
但一切工作正常,如果我有EclipseLink(前的TopLink)代替OpenJPA的這使我得出結論的問題是OpenJPA中。
我在做什麼不對?
我不知道爲什麼會話已關閉,但您應該考慮使用不同的數據庫URL。您使用的那個表示數據庫文件相對於當前工作目錄存儲,這有點危險。我建議使用絕對路徑('jdbc:h2:/ data/db'),或相對於當前用戶主目錄('jdbc:h2:〜/ data/db') –