2

在减少步骤中我遇到了这样的错误。MapReduce 概述页面报告所有作业都已成功完成，但我试图写出的一半记录没有写入。是什么导致了这个错误，我该如何解决？：

    ApplicationError: 10 
Traceback (most recent call last):
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1511, in __call__
    rv = self.handle_exception(request, response, e)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1505, in __call__
    rv = self.router.dispatch(request, response)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher
    return route.handler_adapter(request, response)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1077, in __call__
    return handler.dispatch()
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 547, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 545, in dispatch
    return method(*args, **kwargs)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/base_handler.py", line 65, in post
    self.handle()
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/handlers.py", line 181, in handle
    entity, input_reader, ctx, tstate)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/handlers.py", line 298, in process_data
    output_writer.write(output, ctx)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/output_writers.py", line 693, in write
    ctx.get_pool("records_pool").append(str(data))
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/output_writers.py", line 336, in append
    self.flush()
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/output_writers.py", line 371, in flush
    COUNTER_IO_WRITE_BYTES, len(str_buf))(self._ctx)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 297, in __exit__
    self.close()
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 291, in close
    self._make_rpc_call_with_retry('Close', request, response)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 427, in _make_rpc_call_with_retry
    _make_call(method, request, response)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 252, in _make_call
    _raise_app_error(e)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 195, in _raise_app_error
    raise FileNotOpenedError(e)
FileNotOpenedError: ApplicationError: 10

Traceback (most recent call last):
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/main.py", line 105, in main
    util.run_wsgi_app(APP)
  File "/python27_runtime/python27_lib/versions/1/google/appengine/ext/webapp/util.py", line 98, in run_wsgi_app
    run_bare_wsgi_app(add_wsgi_middleware(application))
  File "/python27_runtime/python27_lib/versions/1/google/appengine/ext/webapp/util.py", line 116, in run_bare_wsgi_app
    result = application(env, _start_response)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1519, in __call__
    response = self._internal_error(e)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1511, in __call__
    rv = self.handle_exception(request, response, e)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1505, in __call__
    rv = self.router.dispatch(request, response)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher
    return route.handler_adapter(request, response)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1077, in __call__
    return handler.dispatch()
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 547, in dispatch
    return self.handle_exception(e, self.app.debug)
  File "/python27_runtime/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 545, in dispatch
    return method(*args, **kwargs)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/base_handler.py", line 65, in post
    self.handle()
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/handlers.py", line 181, in handle
    entity, input_reader, ctx, tstate)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/handlers.py", line 298, in process_data
    output_writer.write(output, ctx)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/output_writers.py", line 693, in write
    ctx.get_pool("records_pool").append(str(data))
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/output_writers.py", line 336, in append
    self.flush()
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/output_writers.py", line 371, in flush
    COUNTER_IO_WRITE_BYTES, len(str_buf))(self._ctx)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 297, in __exit__
    self.close()
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 291, in close
    self._make_rpc_call_with_retry('Close', request, response)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 427, in _make_rpc_call_with_retry
    _make_call(method, request, response)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 252, in _make_call
    _raise_app_error(e)
  File "/base/data/home/apps/s~getaround3/dont-make-this-default-export-mr.366029363091232181/mapreduce/lib/files/file.py", line 195, in _raise_app_error
    raise FileNotOpenedError(e)
FileNotOpenedError: ApplicationError: 10
4

2 回答 2

2

我增加了似乎解决了问题的分片数量。增加分片的数量可以减少每个切片必须保持打开文件的时间，这可能是我遇到问题的原因。

于 2013-03-27T00:24:43.703 回答
0

保持文件打开超过 30 秒也会导致此错误。尝试将写入分成多个写入。

参考链接https://groups.google.com/forum/#!topic/google-appengine-java/5XBVaVDKvvs

于 2013-08-19T06:57:28.173 回答