# Null Pointer Exception on enabling of an Encode

**URL:** <https://community.wowza.com/t/null-pointer-exception-on-enabling-of-an-encode/44194>\
**Category:** Wowza Streaming Engine\
**Created:** [October 30, 2014, 11:08pm UTC](https://community.wowza.com/t/null-pointer-exception-on-enabling-of-an-encode/44194 "2014-10-30T23:08:11Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Robert\_Taylor](https://avatars.discourse-cdn.com/v4/letter/r/3ab097/32.png) [@Robert\_Taylor](https://community.wowza.com/u/Robert_Taylor)\
**Post date:** [October 30, 2014, 11:08pm UTC](https://community.wowza.com/t/null-pointer-exception-on-enabling-of-an-encode/44194/1 "2014-10-30T23:08:11Z")

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Simply clicking “enable encode”…

Stack Trace java.lang.NullPointerException at java.util.ArrayList.addAll(ArrayList.java:472) at com.wowza.wms.webapp.transcoder.TranscoderEncodeModel.setUIData(TranscoderEncodeModel.java:803) at com.wowza.wms.webapp.transcoder.TranscoderEncodeModel.loadUIData(TranscoderEncodeModel.java:734) at com.wowza.wms.webapp.transcoder.TranscoderController.getEncodeEnable(TranscoderController.java:500) at com.wowza.wms.webapp.transcoder.TranscoderController.getEncodeEnable(TranscoderController.java:491) 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 org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:827) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at net.winstone.core.ServletConfiguration.execute(ServletConfiguration.java:270) at net.winstone.core.SimpleRequestDispatcher.forward(SimpleRequestDispatcher.java:290) at net.winstone.core.SimpleRequestDispatcher.doFilter(SimpleRequestDispatcher.java:332) at com.wowza.wms.webapp.RequestLoggingFilter.doFilter(RequestLoggingFilter.java:35) at net.winstone.core.FilterConfiguration.execute(FilterConfiguration.java:189) at net.winstone.core.SimpleRequestDispatcher.doFilter(SimpleRequestDispatcher.java:321) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118) at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260) at net.winstone.core.FilterConfiguration.execute(FilterConfiguration.java:189) at net.winstone.core.SimpleRequestDispatcher.doFilter(SimpleRequestDispatcher.java:321) at com.wowza.wms.webapp.Utf8Filter.doFilter(Utf8Filter.java:35) at net.winstone.core.FilterConfiguration.execute(FilterConfiguration.java:189) at net.winstone.core.SimpleRequestDispatcher.doFilter(SimpleRequestDispatcher.java:321) at net.winstone.core.SimpleRequestDispatcher.forward(SimpleRequestDispatcher.java:288) at net.winstone.core.listener.RequestHandlerThread.processRequest(RequestHandlerThread.java:213) at net.winstone.core.listener.RequestHandlerThread.run(RequestHandlerThread.java:144) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at net.winstone.util.BoundedExecutorService$1.run(BoundedExecutorService.java:81) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662)

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**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [October 31, 2014, 6:26am UTC](https://community.wowza.com/t/null-pointer-exception-on-enabling-of-an-encode/44194/2 "2014-10-31T06:26:23Z")

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Hello there and welcome to the support forum.

In order for us to troubleshoot this further, please can you open a ticket by emailing support@wowza.com and give a detailed description of the issue with a zipped copy of the following directories:

**[Wowza-Install]/conf/**

**[Wowza-Install]/logs/**

**[Wowza-Install]/transcoder/**

**[Wowza-Install]/manager/logs/**

**Please also include a link to this thread for reference.**

**Kind regards,**

**Salvadore**

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**Author:** ![Jason\_Hilton](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/jason_hilton/32/437_2.png) [@Jason\_Hilton](https://community.wowza.com/u/Jason_Hilton)\
**Post date:** [October 31, 2014, 6:24pm UTC](https://community.wowza.com/t/null-pointer-exception-on-enabling-of-an-encode/44194/3 "2014-10-31T18:24:21Z")

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Hi,

We have received your ticket (107807).

This issue will now be handled in the ticket going forward.

Regards,

Jason