Getting stacktrace on lein ring server

[devinus]

urbite git:master ❯ uname -a                                                                                         ⏎ ✖ ✱ ◼
Darwin macbook.local 12.0.0 Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64 x86_64
urbite git:master ❯ java -version                                                                                      ✖ ✱ ◼
java version "1.7.0_06"
Java(TM) SE Runtime Environment (build 1.7.0_06-b24)
Java HotSpot(TM) 64-Bit Server VM (build 23.2-b09, mixed mode)
urbite git:master ❯ clj                                                                                                ✖ ✱ ◼
Clojure 1.4.0
user=> ^C%                                                                                                                   urbite git:master ❯ lein version                                                                                     ⏎ ✖ ✱ ◼
Leiningen 2.0.0-preview8 on Java 1.7.0_06 Java HotSpot(TM) 64-Bit Server VM
urbite git:master ❯ lein ring server                                                                                   ✖ ✱ ◼
2012-08-21 13:35:44.940:INFO:oejs.Server:jetty-7.6.1.v20120215
Started server on port 3000
2012-08-21 13:35:44.984:INFO:oejs.AbstractConnector:Started SelectChannelConnector@0.0.0.0:3000
Exception: java.lang.NullPointerException: null
                                      stacktrace.clj:15 ring.middleware.stacktrace/wrap-stacktrace-log[fn]
                                      stacktrace.clj:79 ring.middleware.stacktrace/wrap-stacktrace-web[fn]
                                          reload.clj:18 ring.middleware.reload/wrap-reload[fn]
                                           jetty.clj:18 ring.adapter.jetty/proxy-handler[fn]
                                       (Unknown Source) ring.adapter.jetty.proxy$org.eclipse.jetty.server.handler.AbstractHandler$0.handle
                                HandlerWrapper.java:111 org.eclipse.jetty.server.handler.HandlerWrapper.handle
                                        Server.java:349 org.eclipse.jetty.server.Server.handle
                        AbstractHttpConnection.java:452 org.eclipse.jetty.server.AbstractHttpConnection.handleRequest
                        AbstractHttpConnection.java:884 org.eclipse.jetty.server.AbstractHttpConnection.headerComplete
                        AbstractHttpConnection.java:938 org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete
                                    HttpParser.java:634 org.eclipse.jetty.http.HttpParser.parseNext
                                    HttpParser.java:230 org.eclipse.jetty.http.HttpParser.parseAvailable
                            AsyncHttpConnection.java:76 org.eclipse.jetty.server.AsyncHttpConnection.handle
                         SelectChannelEndPoint.java:609 org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle
                          SelectChannelEndPoint.java:45 org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run
                              QueuedThreadPool.java:599 org.eclipse.jetty.util.thread.QueuedThreadPool.runJob
                              QueuedThreadPool.java:534 org.eclipse.jetty.util.thread.QueuedThreadPool$3.run
                                        Thread.java:722 java.lang.Thread.run

Exception: java.lang.NullPointerException: null
                                      stacktrace.clj:15 ring.middleware.stacktrace/wrap-stacktrace-log[fn]
                                      stacktrace.clj:79 ring.middleware.stacktrace/wrap-stacktrace-web[fn]
                                          reload.clj:18 ring.middleware.reload/wrap-reload[fn]
                                           jetty.clj:18 ring.adapter.jetty/proxy-handler[fn]
                                       (Unknown Source) ring.adapter.jetty.proxy$org.eclipse.jetty.server.handler.AbstractHandler$0.handle
                                HandlerWrapper.java:111 org.eclipse.jetty.server.handler.HandlerWrapper.handle
                                        Server.java:349 org.eclipse.jetty.server.Server.handle
                        AbstractHttpConnection.java:452 org.eclipse.jetty.server.AbstractHttpConnection.handleRequest
                        AbstractHttpConnection.java:884 org.eclipse.jetty.server.AbstractHttpConnection.headerComplete
                        AbstractHttpConnection.java:938 org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete
                                    HttpParser.java:634 org.eclipse.jetty.http.HttpParser.parseNext
                                    HttpParser.java:230 org.eclipse.jetty.http.HttpParser.parseAvailable
                            AsyncHttpConnection.java:76 org.eclipse.jetty.server.AsyncHttpConnection.handle
                         SelectChannelEndPoint.java:609 org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle
                          SelectChannelEndPoint.java:45 org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run
                              QueuedThreadPool.java:599 org.eclipse.jetty.util.thread.QueuedThreadPool.runJob
                              QueuedThreadPool.java:534 org.eclipse.jetty.util.thread.QueuedThreadPool$3.run
                                        Thread.java:722 java.lang.Thread.run

[weavejester]

Your project.clj file is incorrect. You haven't set the :handler option correctly.

This error could probably require a clearer exception.

[devinus]

Indeed. As soon as I added :ring {:handler urbite.web/app} it worked.

[weavejester]

Better error message for this in Lein-Ring 0.7.4

[devinus]

Thanks @weavejester!

[ilyabo]

Error message is still not very helpful in 0.8.8:

java.lang.NullPointerException: null
reload.clj:18 ring.middleware.reload/wrap-reload[fn]
stacktrace.clj:17 ring.middleware.stacktrace/wrap-stacktrace-log[fn]
stacktrace.clj:80 ring.middleware.stacktrace/wrap-stacktrace-web[fn]

Needs googling to find out what the reason is.

[micrub]

Same here , error message is confusing..