日志中的lighttpd/fastcgi/python错误

我在Lighttpd上运行一个web.py应用程序，发现ajax请求偶尔会失败（有时会很好，有时不会），因此我查看了错误日志，发现其中充满了以下内容：

2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr: Traceback (most recent call last):
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:   File "/usr/local/lib/python2.7/dist-packages/web/application.py", line 237, in process
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:     return p(lambda: process(processors))
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:   File "/usr/local/lib/python2.7/dist-packages/web/session.py", line 85, in _processor
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:     self._load()
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:   File "/usr/local/lib/python2.7/dist-packages/web/session.py", line 106, in _load
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:     d = self.store[self.session_id]
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:   File "/usr/local/lib/python2.7/dist-packages/web/session.py", line 250, in __getitem__
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:     return self.decode(pickled)
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:   File "/usr/local/lib/python2.7/dist-packages/web/session.py", line 210, in decode
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr:     return pickle.loads(pickled)
2014-07-02 17:22:33: (mod_fastcgi.c.2673) FastCGI-stderr: EOFError

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以前有人遇到过这些错误吗？

编辑此文件：/usr/local/lib/python2.7/dist-packages/web/session.py

import threading
lock = threading.Lock()                                                          


class DiskStore(Store): 
     .......
     .......

     def __getitem__(self, key):                                                  
         path = self._get_path(key)                                               
         if os.path.exists(path):                                                 
             lock.acquire()                                                       
             f = open(path)                                                       
             try:                                                                 
                 pickled = f.read()
                 return self.decode(pickled)                                      
             finally:                                                             
                 f.close()                                                        
                 lock.release()                                                   
         else:                                                                    
             raise KeyError, key                                                  

     def __setitem__(self, key, value):                                           
         path = self._get_path(key)                                               
         pickled = self.encode(value)                                             
         try:                                                                     
             lock.acquire()                                                       
             f = open(path, 'w')                                                  
             try:                                                                 
                 f.write(pickled)                                                 
             finally:                                                             
                 f.close()                                                        
                 lock.release()                                                       
         except IOError:                                                          
             lock.release()                                                       
             pass   

2014-07-02 17:22:33:（mod_fastcgi.c.2673）fastcgi标准：回溯（最近一次呼叫最后一次）：
2014-07-02 17:22:33：（mod_fastcgi.c.2673）fastcgi标准：文件“/usr/local/lib/python2.7/dist-packages/web/application.py”，第237行，正在处理中
2014-07-02 17:22:33：（mod_fastcgi.c.2673）fastcgi标准：返回p（lambda：进程（处理器））
2014-07-02 17:22:33：（mod_fastcgi.c.2673）fastcgi标准：文件“/usr/local/lib/python2.7/dist-packages/web/session.py”，第85行，在处理器中
2014-07-02 17:22:33：（mod_fastcgi.c.2673）fastcgi标准：自加载
2014-07-02 17:22:33:（mod_fastcgi.c.2673）fastcgi标准：文件“/usr/local/lib/python2.7/dist-packages/web/session.py”，第106行，在加载中
2014-07-02 17:22:33：（mod_fastcgi.c.2673）fastcgi标准：d=self.store[self.session_id]
2014-07-02 17:22:33:（mod_fastcgi.c.2673）fastcgi标准：文件“/usr/local/lib/python2.7/dist packages/web/session.py”，第250行，在getitem
2014-07-02 17:22:33：（mod_fastcgi.c.2673）fastcgi标准：返回自我解码（pickled）
2014-07-02 17:22:33：（mod_fastcgi.c.2673）fastcgi标准：文件“/usr/local/lib/python2.7/dist packages/web/session.py”，第210行，解码
2014-07-02 17:22:33：（mod_fastcgi.c.2673）fastcgi标准：返回酸洗。装载（酸洗）

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2014-07-02 17:22:33:（mod_fastcgi.c.2673）fastcgi stderr:eoferor

我认为查看代码（至少是Ajaxed部分）会有所帮助