Failed to load multiple versions of AppEngine project and see HardDeadLineExceeded Exceptions

Suddenly, without warning, my AppEngine project will no longer load in the browser. http://my.loopto.do . This also happens with older versions of the app. Below is the 500 error.

I know what DeadlineExceededException is. I don't understand why this is happening, even in versions that previously worked fine, no problem. The magazine flipped to EVERYTHING doesn't seem to shed any light on what the problem is.

Another interesting point is that the same codebase being loaded into a different appspot domain loads without issue.

... This way the code works in one appspot domain but not another, isolating the code as a constant. - Also, older versions that previously worked on a broken appspot domain also experience HardDeadlineExceededError. - The app also downloads fine to localhost using the latest SDK 1.6.2.1.

I assume this is an Appengine issue because the log doesn't show exactly where my code is breaking.

What do I need to do to fix this problem?

Here is StackTrace:

2012-02-23 12:50:06.744 /loop/?t=1330030019399 500 187376ms 1kb Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/13.0.782.112 Safari/535.1
50.43.101.83 - user.name [23/Feb/2012:12:50:06 -0800] "GET /loop/?t=1330030019399 HTTP/1.1" 500 1309 "http://0-9-2012-2-23.loopaback.appspot.com/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/13.0.782.112 Safari/535.1" "0-9-2012-2-23.loopaback.appspot.com" ms=187376 cpu_ms=560 api_cpu_ms=0 cpm_usd=0.015809     loading_request=1 pending_ms=13 exit_code=104     instance=00c61b117c1a26c7b1ad046194db91806cb9d7
W 2012-02-23 12:50:06.616

Failed startup of context com.google.apphosting.utils.jetty.RuntimeAppEngineWebAppContext@fe2558{/,/base/data/home/apps/s~loopaback/0-9-2012-2-23.357026711120155741}
com.google.apphosting.api.DeadlineExceededException: This request (c567eadbd5f794fd) started at 2012/02/23 20:47:09.524 UTC and was still executing at 2012/02/23 20:49:56.454 UTC.
    at java.util.zip.ZipFile.getNextEntry(Native Method)
    at java.util.zip.ZipFile.access$400(ZipFile.java:57)
    at java.util.zip.ZipFile$2.nextElement(ZipFile.java:342)
    at java.util.zip.ZipFile$2.nextElement(ZipFile.java:328)
    at java.util.jar.JarFile$1.nextElement(JarFile.java:240)
    at java.util.jar.JarFile$1.nextElement(JarFile.java:235)
    at sun.misc.URLClassPath$JarLoader.addJarEntriesToEntryMap(URLClassPath.java:813)
    at sun.misc.URLClassPath$JarLoader.access$1600(URLClassPath.java:723)
    at sun.misc.URLClassPath$JarLoader$1.run(URLClassPath.java:900)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.misc.URLClassPath$JarLoader.ensureOpenSynchronized(URLClassPath.java:846)
    at sun.misc.URLClassPath$JarLoader.ensureOpen(URLClassPath.java:838)
    at sun.misc.URLClassPath$JarLoader.<init>(URLClassPath.java:785)
    at sun.misc.URLClassPath$JarLoader.<init>(URLClassPath.java:743)
    at sun.misc.URLClassPath$3.run(URLClassPath.java:412)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.misc.URLClassPath.getLoader(URLClassPath.java:395)
    at sun.misc.URLClassPath.getLoader(URLClassPath.java:371)
    at sun.misc.URLClassPath.findResource(URLClassPath.java:201)
    at java.net.URLClassLoader$2.run(URLClassLoader.java:379)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findResource(URLClassLoader.java:376)
    at com.google.apphosting.runtime.security.UserClassLoader.findResource(UserClassLoader.java:723)
    at java.lang.ClassLoader.getResource(ClassLoader.java:977)
    at org.mortbay.resource.Resource.newSystemResource(Resource.java:203)
    at org.mortbay.jetty.webapp.WebXmlConfiguration.configureDefaults(WebXmlConfiguration.java:159)
    at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1230)
    at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
    at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:202)
    at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:171)
    at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123)
    at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:422)
    at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449)
    at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455)
    at com.google.tracing.TraceContext.runInContext(TraceContext.java:695)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325)
    at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453)
    at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
    at java.lang.Thread.run(Thread.java:679)
C 2012-02-23 12:50:06.630
Uncaught exception from servlet
javax.servlet.UnavailableException: Initialization failed.
    at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:211)
    at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:171)
    at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123)
    at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:422)
    at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:449)
    at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:455)
    at com.google.tracing.TraceContext.runInContext(TraceContext.java:695)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:333)
    at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:325)
    at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:453)
    at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
    at java.lang.Thread.run(Thread.java:679)
I 2012-02-23 12:50:06.702
This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application.
W 2012-02-23 12:50:06.702
A serious problem was encountered with the process that handled this request, causing it to exit. This is likely to cause a new process to be used for the next request to your application. If you see this message frequently, you may be throwing exceptions during the initialization of your application. (Error code 104)