使用Thrift經常碰到錯誤提示“No handlers could be found for logger "thrift.server.TServer"”，這句話其實很坑人，尤其是使用thrift的新手。因為，看到這句話也許會認為，應該是自己編寫的server程式框架有問題。也就是如下部分：

<span style="font-size:12px;">handler = XXFilterSpamTextServiceHandler()
processor = XXFilterSpamTextService.Processor(handler)
transport = TSocket.TServerSocket(port=9090)
tfactory = TTransport.TBufferedTransportFactory()
pfactory = TBinaryProtocol.TBinaryProtocolFactory()

server = TServer.TSimpleServer(processor, transport, tfactory, pfactory)

print "starting serve"
server.serve()
print "done!"</span>
 

一.程式框架出錯

此類錯誤易犯人群：小白、程式剛剛寫完第一次除錯階段。這個錯誤解法相當簡單。比照模版看看出錯在那裡，官網模版地址http://thrift.apache.org/tutorial/py。server程式程式碼如下：

import sys, glob
sys.path.append('gen-py')
sys.path.insert(0, glob.glob('../../lib/py/build/lib.*')[0])

from tutorial import Calculator
from tutorial.ttypes import *

from shared.ttypes import SharedStruct

from thrift.transport import TSocket
from thrift.transport import TTransport
from thrift.protocol import TBinaryProtocol
from thrift.server import TServer

class CalculatorHandler:
  def __init__(self):
    self.log = {}

  def ping(self):
    print 'ping()'

  def add(self, n1, n2):
    print 'add(%d,%d)' % (n1, n2)
    return n1+n2

  def calculate(self, logid, work):
    print 'calculate(%d, %r)' % (logid, work)

    if work.op == Operation.ADD:
      val = work.num1 + work.num2
    elif work.op == Operation.SUBTRACT:
      val = work.num1 - work.num2
    elif work.op == Operation.MULTIPLY:
      val = work.num1 * work.num2
    elif work.op == Operation.DIVIDE:
      if work.num2 == 0:
        x = InvalidOperation()
        x.what = work.op
        x.why = 'Cannot divide by 0'
        raise x
      val = work.num1 / work.num2
    else:
      x = InvalidOperation()
      x.what = work.op
      x.why = 'Invalid operation'
      raise x

    log = SharedStruct()
    log.key = logid
    log.value = '%d' % (val)
    self.log[logid] = log

    return val

  def getStruct(self, key):
    print 'getStruct(%d)' % (key)
    return self.log[key]

  def zip(self):
    print 'zip()'

handler = CalculatorHandler()
processor = Calculator.Processor(handler)
transport = TSocket.TServerSocket(port=9090)
tfactory = TTransport.TBufferedTransportFactory()
pfactory = TBinaryProtocol.TBinaryProtocolFactory()

server = TServer.TSimpleServer(processor, transport, tfactory, pfactory)

# You could do one of these for a multithreaded server
#server = TServer.TThreadedServer(processor, transport, tfactory, pfactory)
#server = TServer.TThreadPoolServer(processor, transport, tfactory, pfactory)

print 'Starting the server...'
server.serve()
print 'done.'
 

二.編寫的Handler類中小錯誤

try：
    a=b
except Exception as  e:
    print e