Hi,

Using mapper i am trying to allocate id's to the entities which are already
in the name space. And i am using appengine-java-sdk-1.5.0.
But when i run the mapper its throwing the exception. And i could not find
what is the reason and also unable to stop the mapper ? what is this
exception ?
Is their any way to debug and find the reason behind this exception ?


   1. W2011-06-02 09:09:40.559

   /admin/mapreduce/mapperCallback
   java.lang.RuntimeException: Couldn't find MR with job ID:
job_1307030934805_0001
        at 
com.google.appengine.tools.mapreduce.AppEngineJobContext.getConfigurationFromRequest(AppEngineJobContext.java:157)
        at 
com.google.appengine.tools.mapreduce.AppEngineJobContext.<init>(AppEngineJobContext.java:110)
        at 
com.google.appengine.tools.mapreduce.MapReduceServlet.handleMapperWorker(MapReduceServlet.java:576)
        at 
com.google.appengine.tools.mapreduce.MapReduceServlet.doPost(MapReduceServlet.java:174)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
        at 
com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:66)
        at 
com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118)
        at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.veersoft.filter.ResetUserMessagesAndErrorsFilter.doFilter(ResetUserMessagesAndErrorsFilter.java:28)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:97)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
        at 
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at 
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
        at 
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
        at 
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:238)
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at 
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
        at 
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
        at 
com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at 
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135)
        at 
com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:260)
        at 
com.google.apphosting.base.RuntimePb$EvaluationRuntime$2.handleRequest(RuntimePb.java:9669)
        at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:439)
        at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:573)
        at 
com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:448)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:688)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:326)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:318)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:446)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:636)

   2. C2011-06-02 09:09:40.560

   Uncaught exception from servlet
   java.lang.RuntimeException: Couldn't find MR with job ID:
job_1307030934805_0001
        at 
com.google.appengine.tools.mapreduce.AppEngineJobContext.getConfigurationFromRequest(AppEngineJobContext.java:157)
        at 
com.google.appengine.tools.mapreduce.AppEngineJobContext.<init>(AppEngineJobContext.java:110)
        at 
com.google.appengine.tools.mapreduce.MapReduceServlet.handleMapperWorker(MapReduceServlet.java:576)
        at 
com.google.appengine.tools.mapreduce.MapReduceServlet.doPost(MapReduceServlet.java:174)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at 
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
        at 
com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:66)
        at 
com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:118)
        at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:113)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.veersoft.filter.ResetUserMessagesAndErrorsFilter.doFilter(ResetUserMessagesAndErrorsFilter.java:28)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:97)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:35)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
        at 
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
        at 
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
        at 
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
        at 
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
        at 
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
        at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
        at 
com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:238)
        at 
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
        at org.mortbay.jetty.Server.handle(Server.java:326)
        at 
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
        at 
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
        at 
com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:76)
        at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
        at 
com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:135)
        at 
com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:260)
        at 
com.google.apphosting.base.RuntimePb$EvaluationRuntime$2.handleRequest(RuntimePb.java:9669)
        at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:439)
        at com.google.net.rpc.impl.Server$RpcTask.runInContext(Server.java:573)
        at 
com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:448)
        at com.google.tracing.TraceContext.runInContext(TraceContext.java:688)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:326)
        at 
com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:318)
        at 
com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:446)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:636)



This is the part of mapper code:
.
.
.
.
DatastoreService ds = DatastoreServiceFactory.getDatastoreService();
KeyRange range = new KeyRange(p.getParent(), p.getKind(),
p.getKey().getId(), p.getKey().getId());
ds.allocateIdRange(range);
.
.
.

Any help would be greatly appreciated :)

-- 
Thanks & Regards
Santosh Kumar K**

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