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NullPointerException in InvokerFilter
Victor Lindberg, geändert vor 11 Jahren.
NullPointerException in InvokerFilter
New Member Beiträge: 2 Beitrittsdatum: 21.09.12 Neueste Beiträge
When I access my liferay application:
java.lang.NullPointerException
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.getInvokerFilterChain(InvokerFilter.java:177)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:64)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
How can i solve that?
java.lang.NullPointerException
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.getInvokerFilterChain(InvokerFilter.java:177)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:64)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
How can i solve that?
Mika Koivisto, geändert vor 11 Jahren.
RE: NullPointerException in InvokerFilter
Liferay Legend Beiträge: 1519 Beitrittsdatum: 07.08.06 Neueste Beiträge
Too little information to even start beginning to guess what could be the cause. You should post the full stacktrace and Liferay version you are using. Have you added any custom filters or filter hooks?
James Falkner, geändert vor 10 Jahren.
RE: NullPointerException in InvokerFilter
Liferay Legend Beiträge: 1399 Beitrittsdatum: 17.09.10 Neueste BeiträgeVictor Lindberg:
When I access my liferay application:
java.lang.NullPointerException
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.getInvokerFilterChain(InvokerFilter.java:177)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:64)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:999)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
How can i solve that?
So, I am going to take a wild stab at this, because I just debugged an issue with the same NPE. It was because they were including their own copy of portal-service.jar inside of their plugin's WEB-INF/lib directory, which is a big no-no (because of Liferay's classloading mechanism, it will create instances of Liferay core classes using your plugin's classloader, instead of the Liferay/appserver one (which has its own copy of portal-service.jar). There is stateful information inside classes, so your app ends up using uninintialized versions of many Liferay core classes, including the InvokerServlet, thereby throwing the NPE. So check your build processes and ensure that your plugins never include WEB-INF/lib/portal-service.jar).
Mika Koivisto, geändert vor 10 Jahren.
RE: NullPointerException in InvokerFilter
Liferay Legend Beiträge: 1519 Beitrittsdatum: 07.08.06 Neueste Beiträge
Good catch James. That would definitely cause that. Never ever copy portal-service.jar or portal-impl.jar into your plugin.
Aleksey Korolev, geändert vor 8 Jahren.
RE: NullPointerException in InvokerFilter
New Member Beitrag: 1 Beitrittsdatum: 15.03.16 Neueste Beiträge
I'm on latest Liferay 6.2 ga6 and was getting the same error. It took me some time to realize that this was due to inclusionn of Liferay API as a dependency into my project' pom file:
<dependency>
<groupId>com.liferay.portal</groupId>
<artifactId>com.liferay.portal.kernel</artifactId>
<version>2.0.0</version>
</dependency>
It would be nice to have better error handling for such case and provide some clues about the reason of the error.
For example check ClassLoader of some class, e.g. InvokerFilter, on startup and printing error if "wrong" classloader is detected.
<dependency>
<groupId>com.liferay.portal</groupId>
<artifactId>com.liferay.portal.kernel</artifactId>
<version>2.0.0</version>
</dependency>
It would be nice to have better error handling for such case and provide some clues about the reason of the error.
For example check ClassLoader of some class, e.g. InvokerFilter, on startup and printing error if "wrong" classloader is detected.