Thrift python常見錯誤分析

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：

handler = xxfilterspamtextservicehandler()
processor = xxfilterspamtextservice.processor(handler)
transport = tsocket.tserversocket(port=9090)
tfactory = ttransport.tbufferedtransportfactory()
pfactory = tbinaryprotocol.tbinaryprotocolfactory()
server = tserver.t******server(processor, transport, tfactory, pfactory)
print "starting serve"
server.serve()
print "done!"

當然，有在這部分出錯的，也有在其他地方出錯的。下面我們詳細分析。

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，官網模版位址程式**如下：

import sys, glob
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.t******server(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.'

接下來，我們需要說的是：calculatorhandler，這個類名需要根據實際情況構造，比如這裡他們的名字thrift中的服務類的名字calculator，然後加上乙個handler就可以構造為服務類了，這種類我們統稱為handler類。

對於此，比較好的解決方案是：使用try....except exception as e:模組來手動列印錯誤。try模組**示例如下：

try：
a=bexcept exception as e:
print e

這樣出錯時候，就會報出**出錯了！！！！

Thrift python常見錯誤分析

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常見易錯問題

常見錯誤和找錯方法

Thrift python常見錯誤分析

Fabric first sample常見錯誤

常見易錯問題

常見錯誤和找錯方法

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