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via Google Groups by Johnny Wu via StackOverflow, 1 year ago
java.lang.RuntimeException: java.lang.InstantiationException	at com.google.appengine.api.taskqueue.dev.LocalTaskQueue.initializeCallback(LocalTaskQueue.java:159)	at com.google.appengine.api.taskqueue.dev.LocalTaskQueue.init(LocalTaskQueue.java:149)	at com.google.appengine.tools.development.ApiProxyLocalImpl.startServices(ApiProxyLocalImpl.java:623)	at com.google.appengine.tools.development.ApiProxyLocalImpl.access$700(ApiProxyLocalImpl.java:47)	at com.google.appengine.tools.development.ApiProxyLocalImpl$2.run(ApiProxyLocalImpl.java:604)	at com.google.appengine.tools.development.ApiProxyLocalImpl$2.run(ApiProxyLocalImpl.java:601)	at java.security.AccessController.doPrivileged(Native Method)	at com.google.appengine.tools.development.ApiProxyLocalImpl.getService(ApiProxyLocalImpl.java:600)	at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.callInternal(ApiProxyLocalImpl.java:505)	at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:484)	at com.google.appengine.tools.development.ApiProxyLocalImpl$AsyncApiCall.call(ApiProxyLocalImpl.java:461)	at java.util.concurrent.Executors$PrivilegedCallable$1.run(Executors.java:533)	at java.security.AccessController.doPrivileged(Native Method)	at java.util.concurrent.Executors$PrivilegedCallable.call(Executors.java:530)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)