Do you know of a workaround for this uncaught exception from the Java mapreduce pipeline on Google App Engine?
Is it simply a failure in GcsServiceFactory that created GCS_SERVICE in this line? https://code.google.com/p/appengine-mapreduce/source/browse/trunk/java/src/com/google/appengine/tools/mapreduce/inputs/GoogleCloudStorageLineInputReader.java?r=462#80
Any ideas on how to fix?
We are seeing this frequently:
2013-09-24 18:18:17.819 Uncaught exception from servlet
java.lang.NoSuchMethodError:
com.google.appengine.tools.cloudstorage.GcsService.openPrefetchingReadChannel(Lcom/google/appengine/tools/cloudstorage/GcsFilename;JI)Ljava/nio/channels/ReadableByteChannel;
at com.google.appengine.tools.mapreduce.inputs.GoogleCloudStorageLineInputReader.beginSlice(GoogleCloudStorageLineInputReader.java:79)
at com.google.appengine.tools.mapreduce.impl.WorkerShardTask.run(WorkerShardTask.java:84)
at com.google.appengine.tools.mapreduce.impl.shardedjob.ShardedJobRunner.runTask(ShardedJobRunner.java:265)
at com.google.appengine.tools.mapreduce.impl.shardedjob.ShardedJobServiceImpl.handleWorkerRequest(ShardedJobServiceImpl.java:49)
at com.google.appengine.tools.mapreduce.impl.handlers.MapReduceServletImpl.doPost(MapReduceServletImpl.java:76)
at com.google.appengine.tools.mapreduce.MapReduceServlet.doPost(MapReduceServlet.java:57)
I see any of the below possible reasons :