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Posted to log4j-user@logging.apache.org by Jeremy Heiler <je...@gmail.com> on 2016/10/20 16:03:12 UTC
IllegalAccessError on MapLookup.newMap
I have a Servlet 3.1 webapp running in Tomcat 8.0.32. I've upgraded from
log4j 2.1 to 2.7, and now I am getting the following error. The error
occurs in all versions >=2.4; it works when I downgrade to 2.3. As far as I
know, there is no other version of log4j on my classpath, unless Tomcat is
hiding something. None of my other depdendencies pull in log4j, as checked
by `mvn -Dverbose=true dependency:tree`.
The MapLookup.newMap method appears to be package private, but that should
be accessible to MainMapLookup, which is in the same package. Any ideas on
what I'm doing wrong?
2016-10-20 11:57:42,260 DEBUG Starting LoggerContext[name=WebappClassLoader
context: foo
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@108c4c35
] from configuration at null
2016-10-20 11:57:42,260 DEBUG Starting LoggerContext[name=WebappClassLoader
context: foo
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@108c4c35
, org.apache.logging.log4j.core.LoggerContext@26745914] with configuration
XmlConfiguration[location=/Users/jeremy/acme/foo/target/foo-1.0/WEB-INF/classes/log4j2.xml]...
2016-10-20 11:57:42,260 DEBUG Shutdown hook enabled. Registering a new one.
2016-10-20 11:57:42,261 DEBUG Starting configuration
XmlConfiguration[location=/Users/jeremy/acme/foo/target/foo-1.0/WEB-INF/classes/log4j2.xml]
2016-10-20 11:57:42,261 DEBUG PluginManager 'Core' found 108 plugins
2016-10-20 11:57:42,261 DEBUG PluginManager 'Level' found 0 plugins
2016-10-20 11:57:42,263 DEBUG PluginManager 'Lookup' found 14 plugins
20-Oct-2016 11:57:42.264 SEVERE [RMI TCP Connection(2)-127.0.0.1]
org.apache.catalina.core.ContainerBase.addChildInternal
ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component
[StandardEngine[Catalina].StandardHost[localhost].StandardContext[/foo]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
at
org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1692)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at
org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:465)
at
org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:415)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
at
com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at
javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
at
javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
at
javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)
at
javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401)
at
javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:323)
at sun.rmi.transport.Transport$1.run(Transport.java:200)
at sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
at
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
at
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
at java.security.AccessController.doPrivileged(Native Method)
at
sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalAccessError: tried to access method
org.apache.logging.log4j.core.lookup.MapLookup.newMap(I)Ljava/util/HashMap;
from class org.apache.logging.log4j.core.lookup.MainMapLookup
at
org.apache.logging.log4j.core.lookup.MainMapLookup.<clinit>(MainMapLookup.java:37)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at
org.apache.logging.log4j.core.util.ReflectionUtil.instantiate(ReflectionUtil.java:185)
at
org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:65)
at
org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:346)
at
org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:161)
at
org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:359)
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:169)
at
org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:204)
at
org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:110)
at
org.apache.logging.log4j.web.Log4jWebInitializerImpl.initializeNonJndi(Log4jWebInitializerImpl.java:157)
at
org.apache.logging.log4j.web.Log4jWebInitializerImpl.start(Log4jWebInitializerImpl.java:107)
at
org.apache.logging.log4j.web.Log4jServletContainerInitializer.onStartup(Log4jServletContainerInitializer.java:57)
at
org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5244)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
... 42 more
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="trace">
<Appenders>
<Console name="STDOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p [%t] %m%n"/>
</Console>
<Console name="XSLOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p [%t] %C (%F:%L) - %m%n"/>
</Console>
</Appenders>
<Loggers>
<Logger name="com.acme" level="debug" additivity="false">
<AppenderRef ref="STDOUT"/>
</Logger>
<Logger name="org.apache.fop" level="warn" additivity="false">
<AppenderRef ref="XSLOUT"/>
</Logger>
</Loggers>
</Configuration>
Thanks,
;; Jeremy
Re: IllegalAccessError on MapLookup.newMap
Posted by Gary Gregory <ga...@gmail.com>.
On Thu, Oct 20, 2016 at 12:04 PM, Jeremy Heiler <je...@gmail.com>
wrote:
> On Thu, Oct 20, 2016 at 1:26 PM, Jeremy Heiler <je...@gmail.com>
> wrote:
> >
> > On Thu, Oct 20, 2016 at 12:58 PM, Gary Gregory <ga...@gmail.com>
> wrote:
> > >
> > > From the stack trace, as you mention, this is the error:
> > >
> > > Caused by: java.lang.IllegalAccessError: tried to access method
> > >
> org.apache.logging.log4j.core.lookup.MapLookup.newMap(I)
> Ljava/util/HashMap;
> > > from class org.apache.logging.log4j.core.lookup.MainMapLookup
> > >
> > > These two classes should come from the same package in the same jar.
> > > Log4jServletContainerInitializer is in a different jar, which should
> not
> > > matter.
> > >
> > > Hm... how can this error happen? Could each class be loaded from
> different
> > > versions of the core jar? How is that even possible? Or did the web
> > > container explode the jars somehow? ...
> >
> > As I said, my project only contains the one version of log4j. (Unless
> Tomcat is sneaking something in that I'm not seeing.)
>
> Forgive me, for I have sinned. I never did a 'clean' after updating the
> version in my POM. Apparently Inteillj's "rebuild project" feature does not
> do that. So, the exploded WAR file in target/ had both versions of log4j.
>
> Sorry for the noise...
>
All clear! ;-)
Gary
--
E-Mail: garydgregory@gmail.com | ggregory@apache.org
Java Persistence with Hibernate, Second Edition
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<https://www.amazon.com/gp/product/1935182021/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1935182021&linkCode=as2&tag=garygregory-20&linkId=31ecd1f6b6d1eaf8886ac902a24de418%22>
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Spring Batch in Action
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Re: IllegalAccessError on MapLookup.newMap
Posted by Jeremy Heiler <je...@gmail.com>.
On Thu, Oct 20, 2016 at 1:26 PM, Jeremy Heiler <je...@gmail.com>
wrote:
>
> On Thu, Oct 20, 2016 at 12:58 PM, Gary Gregory <ga...@gmail.com>
wrote:
> >
> > From the stack trace, as you mention, this is the error:
> >
> > Caused by: java.lang.IllegalAccessError: tried to access method
> >
org.apache.logging.log4j.core.lookup.MapLookup.newMap(I)Ljava/util/HashMap;
> > from class org.apache.logging.log4j.core.lookup.MainMapLookup
> >
> > These two classes should come from the same package in the same jar.
> > Log4jServletContainerInitializer is in a different jar, which should not
> > matter.
> >
> > Hm... how can this error happen? Could each class be loaded from
different
> > versions of the core jar? How is that even possible? Or did the web
> > container explode the jars somehow? ...
>
> As I said, my project only contains the one version of log4j. (Unless
Tomcat is sneaking something in that I'm not seeing.)
Forgive me, for I have sinned. I never did a 'clean' after updating the
version in my POM. Apparently Inteillj's "rebuild project" feature does not
do that. So, the exploded WAR file in target/ had both versions of log4j.
Sorry for the noise...
Re: IllegalAccessError on MapLookup.newMap
Posted by Jeremy Heiler <je...@gmail.com>.
On Thu, Oct 20, 2016 at 12:58 PM, Gary Gregory <ga...@gmail.com>
wrote:
>
> From the stack trace, as you mention, this is the error:
>
> Caused by: java.lang.IllegalAccessError: tried to access method
>
org.apache.logging.log4j.core.lookup.MapLookup.newMap(I)Ljava/util/HashMap;
> from class org.apache.logging.log4j.core.lookup.MainMapLookup
>
> These two classes should come from the same package in the same jar.
> Log4jServletContainerInitializer is in a different jar, which should not
> matter.
>
> Hm... how can this error happen? Could each class be loaded from different
> versions of the core jar? How is that even possible? Or did the web
> container explode the jars somehow? ...
As I said, my project only contains the one version of log4j. (Unless
Tomcat is sneaking something in that I'm not seeing.)
I'm not sure how whether or not the jars are exploded makes a difference
with package accessibility?
Maybe there's something weird going on with the ClassLoader and the
LoggerContext?
Re: IllegalAccessError on MapLookup.newMap
Posted by Gary Gregory <ga...@gmail.com>.
From the stack trace, as you mention, this is the error:
Caused by: java.lang.IllegalAccessError: tried to access method
org.apache.logging.log4j.core.lookup.MapLookup.newMap(I)Ljava/util/HashMap;
from class org.apache.logging.log4j.core.lookup.MainMapLookup
These two classes should come from the same package in the same jar.
Log4jServletContainerInitializer is in a different jar, which should not
matter.
Hm... how can this error happen? Could each class be loaded from different
versions of the core jar? How is that even possible? Or did the web
container explode the jars somehow? ...
Gary
On Thu, Oct 20, 2016 at 9:03 AM, Jeremy Heiler <je...@gmail.com>
wrote:
> I have a Servlet 3.1 webapp running in Tomcat 8.0.32. I've upgraded from
> log4j 2.1 to 2.7, and now I am getting the following error. The error
> occurs in all versions >=2.4; it works when I downgrade to 2.3. As far as I
> know, there is no other version of log4j on my classpath, unless Tomcat is
> hiding something. None of my other depdendencies pull in log4j, as checked
> by `mvn -Dverbose=true dependency:tree`.
>
> The MapLookup.newMap method appears to be package private, but that should
> be accessible to MainMapLookup, which is in the same package. Any ideas on
> what I'm doing wrong?
>
> 2016-10-20 11:57:42,260 DEBUG Starting LoggerContext[name=
> WebappClassLoader
> context: foo
> delegate: false
> ----------> Parent Classloader:
> java.net.URLClassLoader@108c4c35
> ] from configuration at null
> 2016-10-20 11:57:42,260 DEBUG Starting LoggerContext[name=
> WebappClassLoader
> context: foo
> delegate: false
> ----------> Parent Classloader:
> java.net.URLClassLoader@108c4c35
> , org.apache.logging.log4j.core.LoggerContext@26745914] with configuration
> XmlConfiguration[location=/Users/jeremy/acme/foo/target/
> foo-1.0/WEB-INF/classes/log4j2.xml]...
> 2016-10-20 11:57:42,260 DEBUG Shutdown hook enabled. Registering a new one.
> 2016-10-20 11:57:42,261 DEBUG Starting configuration
> XmlConfiguration[location=/Users/jeremy/acme/foo/target/
> foo-1.0/WEB-INF/classes/log4j2.xml]
> 2016-10-20 11:57:42,261 DEBUG PluginManager 'Core' found 108 plugins
> 2016-10-20 11:57:42,261 DEBUG PluginManager 'Level' found 0 plugins
> 2016-10-20 11:57:42,263 DEBUG PluginManager 'Lookup' found 14 plugins
> 20-Oct-2016 11:57:42.264 SEVERE [RMI TCP Connection(2)-127.0.0.1]
> org.apache.catalina.core.ContainerBase.addChildInternal
> ContainerBase.addChild: start:
> org.apache.catalina.LifecycleException: Failed to start component
> [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/foo]]
> at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)
> at
> org.apache.catalina.core.ContainerBase.addChildInternal(
> ContainerBase.java:725)
> at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
> at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
> at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1692)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
> 62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(
> DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.tomcat.util.modeler.BaseModelMBean.invoke(
> BaseModelMBean.java:300)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(
> DefaultMBeanServerInterceptor.java:819)
> at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
> at
> org.apache.catalina.mbeans.MBeanFactory.createStandardContext(
> MBeanFactory.java:465)
> at
> org.apache.catalina.mbeans.MBeanFactory.createStandardContext(
> MBeanFactory.java:415)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
> 62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(
> DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.tomcat.util.modeler.BaseModelMBean.invoke(
> BaseModelMBean.java:300)
> at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(
> DefaultMBeanServerInterceptor.java:819)
> at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
> at
> javax.management.remote.rmi.RMIConnectionImpl.doOperation(
> RMIConnectionImpl.java:1468)
> at
> javax.management.remote.rmi.RMIConnectionImpl.access$300(
> RMIConnectionImpl.java:76)
> at
> javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(
> RMIConnectionImpl.java:1309)
> at
> javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(
> RMIConnectionImpl.java:1401)
> at
> javax.management.remote.rmi.RMIConnectionImpl.invoke(
> RMIConnectionImpl.java:829)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
> 62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(
> DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:323)
> at sun.rmi.transport.Transport$1.run(Transport.java:200)
> at sun.rmi.transport.Transport$1.run(Transport.java:197)
> at java.security.AccessController.doPrivileged(Native Method)
> at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
> at sun.rmi.transport.tcp.TCPTransport.handleMessages(
> TCPTransport.java:568)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(
> TCPTransport.java:826)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$
> 0(TCPTransport.java:683)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(
> TCPTransport.java:682)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(
> ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(
> ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.IllegalAccessError: tried to access method
> org.apache.logging.log4j.core.lookup.MapLookup.newMap(I)
> Ljava/util/HashMap;
> from class org.apache.logging.log4j.core.lookup.MainMapLookup
> at
> org.apache.logging.log4j.core.lookup.MainMapLookup.<clinit>(
> MainMapLookup.java:37)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(
> NativeConstructorAccessorImpl.java:62)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(
> DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
> at
> org.apache.logging.log4j.core.util.ReflectionUtil.
> instantiate(ReflectionUtil.java:185)
> at
> org.apache.logging.log4j.core.lookup.Interpolator.<init>(
> Interpolator.java:65)
> at
> org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(
> AbstractConfiguration.java:346)
> at
> org.apache.logging.log4j.core.config.AbstractConfiguration.
> start(AbstractConfiguration.java:161)
> at
> org.apache.logging.log4j.core.LoggerContext.setConfiguration(
> LoggerContext.java:359)
> at org.apache.logging.log4j.core.LoggerContext.start(
> LoggerContext.java:169)
> at
> org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(
> Log4jContextFactory.java:204)
> at
> org.apache.logging.log4j.core.config.Configurator.
> initialize(Configurator.java:110)
> at
> org.apache.logging.log4j.web.Log4jWebInitializerImpl.initializeNonJndi(
> Log4jWebInitializerImpl.java:157)
> at
> org.apache.logging.log4j.web.Log4jWebInitializerImpl.start(
> Log4jWebInitializerImpl.java:107)
> at
> org.apache.logging.log4j.web.Log4jServletContainerInitializer.onStartup(
> Log4jServletContainerInitializer.java:57)
> at
> org.apache.catalina.core.StandardContext.startInternal(
> StandardContext.java:5244)
> at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)
> ... 42 more
>
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="trace">
> <Appenders>
> <Console name="STDOUT" target="SYSTEM_OUT">
> <PatternLayout pattern="%d %-5p [%t] %m%n"/>
> </Console>
> <Console name="XSLOUT" target="SYSTEM_OUT">
> <PatternLayout pattern="%d %-5p [%t] %C (%F:%L) - %m%n"/>
> </Console>
> </Appenders>
> <Loggers>
> <Logger name="com.acme" level="debug" additivity="false">
> <AppenderRef ref="STDOUT"/>
> </Logger>
> <Logger name="org.apache.fop" level="warn" additivity="false">
> <AppenderRef ref="XSLOUT"/>
> </Logger>
> </Loggers>
> </Configuration>
>
> Thanks,
> ;; Jeremy
>
--
E-Mail: garydgregory@gmail.com | ggregory@apache.org
Java Persistence with Hibernate, Second Edition
<https://www.amazon.com/gp/product/1617290459/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1617290459&linkCode=as2&tag=garygregory-20&linkId=cadb800f39946ec62ea2b1af9fe6a2b8>
<http:////ir-na.amazon-adsystem.com/e/ir?t=garygregory-20&l=am2&o=1&a=1617290459>
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Spring Batch in Action
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