getAllDefinitions Exception in Proton CEP

Question

I have deployed Proton CEP on our own server on CentOS and Tomcat 7.

The call to /ProtonOnWebServerAdmin/resources/definitions

is failing with the exception:

java.lang.NullPointerException
com.ibm.hrl.proton.admin.webapp.resources.DefinitionsResource.getAllDefinitions(DefinitionsResource.java:76)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.apache.wink.server.internal.handlers.InvokeMethodHandler.handleRequest(InvokeMethodHandler.java:63)
org.apache.wink.server.handlers.AbstractHandler.handleRequest(AbstractHandler.java:33)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.internal.handlers.CreateInvocationParametersHandler.handleRequest(CreateInvocationParametersHandler.java:54)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleResourceMethod(FindResourceMethodHandler.java:151)
org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleRequest(FindResourceMethodHandler.java:65)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.internal.handlers.FindRootResourceHandler.handleRequest(FindRootResourceHandler.java:95)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.internal.handlers.HeadMethodHandler.handleRequest(HeadMethodHandler.java:53)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.internal.handlers.OptionsMethodHandler.handleRequest(OptionsMethodHandler.java:46)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.internal.handlers.SearchResultHandler.handleRequest(SearchResultHandler.java:33)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.internal.log.ResourceInvocation.handleRequest(ResourceInvocation.java:92)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.internal.log.Requests.handleRequest(Requests.java:76)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:48)
org.apache.wink.server.internal.RequestProcessor.handleRequestWithoutFaultBarrier(RequestProcessor.java:207)
org.apache.wink.server.internal.RequestProcessor.handleRequest(RequestProcessor.java:154)
org.apache.wink.server.internal.servlet.RestServlet.service(RestServlet.java:119)
javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Other APIs like work fine. For example:

PUT ProtonOnWebServerAdmin/resources/instances/ProtonOnWebServer returns 200 OK

I can also successfully change the stage of the running instance with: ProtonOnWebServerAdmin/resources/instances/ProtonOnWebServer

Additionally, the folder where the definitions should be is empty. In ProtonAdmin.properties it is configured as definitions-repository=/home/xmarine/ProtonDefinitions`

The permissions on that folder are:

[xmarine@app-fiware ProtonOnWebServerAdmin]$ ls -al /home/xmarine/ProtonDefinitions/
total 4
drwxrwxr-x 2 tomcat  tomcat     6 dec  8 12:18 .
drwx------ 7 xmarine xmarine 4096 dec 14 14:40 ..

Could you help me solve this?

Answer 1

The solution was to modify the definitions-repository in ProtonAdmin.properties.

Previously it was: /home/xmarine/ProtonDefinitions The new one was: /opt/definitions

Also, I had to make the user tomcat is owner of that folder with:

sudo chown tomcat:root /opt/definitions.