CODEWITHSUNDEEP
javaexceptionjakarta-eejpaeclipselink
Rox
Rox

Reputation: 2917

I get a PersistenceException and I cannot understand why

I am running a web service using EclipseLink and it works good. But sometimes I get an exception saying "Unable to predeploy PersistenceUnit". I i don´t have a clue why I am getting this. Everything else seems to work and the exception doesn´t seem to disturb the application, it is just beeing catched.

Exception Description: Unable to predeploy PersistenceUnit [MyLibPU] in invalid state [Undeployed]
javax.persistence.PersistenceException: Exception [EclipseLink-28017] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Unable to predeploy PersistenceUnit [MyLibPU] in invalid state [Undeployed]
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:956)
    at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:121)
    at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
    at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
....
....
Caused by: Exception [EclipseLink-28017] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Unable to predeploy PersistenceUnit [MyLibPU] in invalid state [Undeployed]
    at org.eclipse.persistence.exceptions.EntityManagerSetupException.cannotPredeploy(EntityManagerSetupException.java:202)
    ... 30 more

In the exception I can find a trace to a line in a method: 

EntityManagerFactory emf = Persistence.createEntityManagerFactory("MyLibPU");

Why am I getting this?

EDIT
This is the output I get when eclipselink logging is set to FINEST.

[EL Finest]: 2012-04-23 15:19:06.025--ServerSession(2134178364)--Thread(Thread[Finalizer,8,system])--End undeploying Persistence Unit MyLibPU; session file:/home/Rox/MyLib/trunk/MyLib/build/classes/_MyLibPU; state Undeployed; factoryCount 0
[EL Finest]: 2012-04-23 15:19:06.025--ServerSession(2113649746)--Thread(Thread[Finalizer,8,system])--Begin undeploying Persistence Unit MyLibPU; session file:/home/Rox/MyLib/trunk/MyLib/src/_MyLibPU; state Deployed; factoryCount 3
[EL Finest]: 2012-04-23 15:19:06.025--ServerSession(2113649746)--Thread(Thread[Finalizer,8,system])--End undeploying Persistence Unit MyLibPU; session file:/home/Rox/MyLib/trunk/MyLib/src/_MyLibPU; state Deployed; factoryCount 2
Apr 23, 2012 3:19:06 PM com.sun.xml.internal.ws.server.sei.EndpointMethodHandler invoke
SEVERE: Exception [EclipseLink-28017] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Unable to predeploy PersistenceUnit [MyLibPU] in invalid state [Undeployed]
javax.persistence.PersistenceException: Exception [EclipseLink-28017] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Unable to predeploy PersistenceUnit [MyLibPU] in invalid state [Undeployed]
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:956)
    at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:121)
    at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
    at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
    at com.mylib.MyImplementation.getPersons(MyImplementation.java:171)
    at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.xml.internal.ws.api.server.InstanceResolver$1.invoke(InstanceResolver.java:235)
    at com.sun.xml.internal.ws.server.InvokerTube$2.invoke(InvokerTube.java:135)
    at com.sun.xml.internal.ws.server.sei.EndpointMethodHandler.invoke(EndpointMethodHandler.java:246)
    at com.sun.xml.internal.ws.server.sei.SEIInvokerTube.processRequest(SEIInvokerTube.java:85)
    at com.sun.xml.internal.ws.api.pipe.Fiber.__doRun(Fiber.java:626)
    at com.sun.xml.internal.ws.api.pipe.Fiber._doRun(Fiber.java:585)
    at com.sun.xml.internal.ws.api.pipe.Fiber.doRun(Fiber.java:570)
    at com.sun.xml.internal.ws.api.pipe.Fiber.runSync(Fiber.java:467)
    at com.sun.xml.internal.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:299)
    at com.sun.xml.internal.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:593)
    at com.sun.xml.internal.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:244)
    at com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handleExchange(WSHttpHandler.java:95)
    at com.sun.xml.internal.ws.transport.http.server.WSHttpHandler.handle(WSHttpHandler.java:80)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:77)
    at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:83)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:80)
    at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:668)
    at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:77)
    at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:640)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
Caused by: Exception [EclipseLink-28017] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Unable to predeploy PersistenceUnit [MyLibPU] in invalid state [Undeployed]
    at org.eclipse.persistence.exceptions.EntityManagerSetupException.cannotPredeploy(EntityManagerSetupException.java:202)
    ... 30 more

[EL Finer]: 2012-04-23 15:20:06.003--Thread(Thread[pool-1-thread-61,5,main])--fixUNC: before fixing: url = file:/home/Rox/MyLib/build/classes/, authority = , file = /home/Rox/MyLib/build/classes/ (There is no English translation for this message.)
[EL Finer]: 2012-04-23 15:20:06.012--Thread(Thread[pool-1-thread-61,5,main])--fixUNC: after fixing: url = file:/home.....

EDIT 2
My persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
  <persistence-unit name="MyLibPU" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <class>com.mylib.Person</class>
    <class>com.mylib.Group</class>
    <properties>
      <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/MY_DB"/>
      <property name="javax.persistence.jdbc.password" value="MyPassword"/>
      <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
      <property name="javax.persistence.jdbc.user" value="root"/>
      <property name="eclipselink.logging.level" value="FINEST"/>;
      <property name="eclipselink.logging.level.sql" value="FINEST"/>;
      <property name="eclipselink.logging.parameters" value="true"/>;
    </properties>
  </persistence-unit>
</persistence>

Upvotes: 4

Views: 8745

Answers (3)

profimedica
profimedica

Reputation: 2830

Do not use static constructors or similar constructions when working with databases. This might avoid a lo to troubles. Try to insert pauses and explicit log commands in your code to find the error to find how far your code go.

Upvotes: 0

ewernli
ewernli

Reputation: 38605

If the error is sporadic, maybe this mean it's a timing issue. Also, apparently you are creating the factory multiple times during the lifecycle of the app (let me know if I'm wrong). So, it coud be that concurrent requests to your web app trigger the concurrent creation of factories. This case might not be supported.

It is anyway good to create the factory only once. See this question on how to do it. Then you can concurrently call createEntityManager on it -- this method is thread-safe.

Upvotes: 1

Old Pro
Old Pro

Reputation: 25537

There are issues with undeploying Hibernate. It looks like you're running into them when you try to undeploy and redeploy. Do you have a problem when you do a full server restart?

EDIT: Sorry, you clearly said you were using EclipseLink, not sure why I thought you were using Hibernate.

In any case, this line in your log is worrying:

[EL Finest]: 2012-04-23 15:19:06.025--ServerSession(2113649746)--Thread(Thread[Finalizer,8,system])--Begin undeploying Persistence Unit MyLibPU; session file:/home/Rox/MyLib/trunk/MyLib/src/_MyLibPU; state Deployed; factoryCount 3

I'm not sure what factoryCount means but I don't like that it is > 1. Most worrying, though, is "Begin undeploying Persistence Unit MyLibPU". Why is the PU being undeployed? I thought it was because you were undeploying the app, but in your comments you say "The errors can occur anytime during the application´s lifetime and only occur 2-5 times every 24 hours." In that case, you need to figure out what is triggering the undeploy.

Upvotes: 0

Related Questions