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不能使用EntityTransaction我有一个例外：Glassfish的例外：在使用JTA
java.lang.IllegalStateException: Exception Description: Cannot use an EntityTransaction while using JTA.
我的项目是不是一个EJB，它是GWT项目。 我读了很多主题click,click,click与相同的主题，但它不需要结果...
我使用Glassfish Installed Version: GlassFish v3 (build 74.2)。
我的persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="1.0" xmlns="http://java.sun.com/xml/ns/persistence"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="fpkmPU" transaction-type="JTA">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<jta-data-source>jdbc/fpkmDB</jta-data-source>
<class>...</class>
...
<properties>
<property name="eclipselink.target-server" value="SunAS9"/>
<property name="eclipselink.target-database" value="Oracle"/>
<property name="eclipselink.logging.level" value="WARNING"/>
<property name="eclipselink.ddl-generation" value="none"/>
<property name="eclipselink.jdbc.cache-statements" value="true"/>
<property name="eclipselink.jdbc.cache-statements.size" value="100"/>
<property name="eclipselink.jdbc.batch-writing" value="JDBC"/>
<property name="eclipselink.jdbc.batch-writing.size" value="1000"/>
<property name="eclipselink.jdbc.property.defaultRowPrefetch" value="1000"/>
<property name="eclipselink.transaction.join-existing" value="true"/>
</properties>
</persistence-unit>
异常代码抛出：
ParametrizedEntityManager em = persistenceService.getEntityManager();
if (em == null) {
throw new NullPointerException("Entity Manager is null!");
}
EntityTransaction tx = null;
try {
tx = em.getTransaction(); //exception is here
...
} catch(...){
}
如果我从代码中删除EntityTransaction - 我有一个像java.sql.SQLException: Error in allocating a connection. Cause: In-use connections equal max-pool-size and expired max-wait-time. Cannot allocate more connections.
异常我在做什么错误？
此代码在tomcat上运行良好。
堆栈跟踪是：
Exception Description: Cannot use an EntityTransaction while using JTA.
at org.eclipse.persistence.internal.jpa.transaction.JTATransactionWrapper.getTransaction(JTATransactionWrapper.java:65)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.getTransaction(EntityManagerImpl.java:1103)
at com.eximb.fpcm.server.eclipselink.jpa.ParametrizedEntityManager.getTransaction(ParametrizedEntityManager.java:314)
at com.eximb.fpcm.server.service.api.AbstractCommand.invoke(AbstractCommand.java:52)
at com.eximb.fpcm.server.service.orgUnit.OrgUnitServiceImpl.findAll(OrgUnitServiceImpl.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:332)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:233)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
at java.lang.Thread.run(Thread.java:619)