I want to add new servlet to handle post request for some custom operations in camunda webapp.
For this, I created servlet class named “RestServlet” and in webapp web.xml, i provided the entry to map as like below.
RestServlet org.restlet.ext.servlet.ServerServlet org.restlet.application com.amritatech.weaver.restlet.RESTApplication<servlet-mapping>
<servlet-name>RestServlet</servlet-name>
<url-pattern>/CustomAPI/*</url-pattern>
</servlet-mapping>
My api call is http://localhost:8080/camunda/CustomAPI.
On call this api as post, got this error.
org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [RestServlet] in context with path [/camunda] threw exception
java.lang.IllegalStateException: Cannot create a session after the response has been committed
at org.apache.catalina.connector.Request.doGetSession(Request.java:2983)
at org.apache.catalina.connector.Request.getSession(Request.java:2416)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:908)
at org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:920)
at org.camunda.bpm.webapp.impl.security.auth.AuthenticationFilter.doFilter(AuthenticationFilter.java:68)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1747)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Any help will appreciate.