redis hang (this is when the bug occurs)

3048514 421393139 [main] redis-server 5908 readv: readv (8, 0x22C654, 1) blocking, sigcatchers 0
  166 421393305 [main] redis-server 5908 fhandler_base::read: returning 65536, binary mode
   28 421393333 [main] redis-server 5908 readv: 65536 = readv (8, 0x22C654, 1), errno 0
3118409 424511742 [main] redis-server 5908 readv: readv (8, 0x22C654, 1) blocking, sigcatchers 0
  112 424511854 [main] redis-server 5908 fhandler_base::read: returning 65536, binary mode
   26 424511880 [main] redis-server 5908 readv: 65536 = readv (8, 0x22C654, 1), errno 0
2811564 427323444 [main] redis-server 5908 readv: readv (8, 0x22C654, 1) blocking, sigcatchers 0
  105 427323549 [main] redis-server 5908 fhandler_base::read: returning 65536, binary mode
   24 427323573 [main] redis-server 5908 readv: 65536 = readv (8, 0x22C654, 1), errno 0
573753 427897326 [main] redis-server 5908 fhandler_base::fstat: here
   38 427897364 [main] redis-server 5908 time: 1287180902 = time (0)
   25 427897389 [main] redis-server 5908 fstat64: 0 = fstat (3, 0x22C608)
   57 427897446 [main] redis-server 5908 isatty: 0 = isatty (3)
  144 427897590 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   26 427897616 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2151 427899767 [main] redis-server 5908 writev: writev (3, 0x22C694, 1)
   36 427899803 [main] redis-server 5908 fhandler_base::write: binary write
   28 427899831 [main] redis-server 5908 writev: 187 = write (3, 0x22C694, 1), errno 0
   69 427899900 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   26 427899926 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2459956 430359882 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   45 430359927 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2212 430362139 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   39 430362178 [main] redis-server 5908 fhandler_base::write: binary write
   28 430362206 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
   69 430362275 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   24 430362299 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2503534 432865833 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   46 432865879 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2355 432868234 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   36 432868270 [main] redis-server 5908 fhandler_base::write: binary write
   28 432868298 [main] redis-server 5908 writev: 186 = write (3, 0x22C714, 1), errno 0
   68 432868366 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   24 432868390 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2487142 435355532 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   46 435355578 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 0)
 2910 435358488 [main] redis-server 5908 writev: writev (3, 0x22C714, 1)
   40 435358528 [main] redis-server 5908 fhandler_base::write: binary write
  232 435358760 [main] redis-server 5908 writev: 143 = write (3, 0x22C714, 1), errno 0
  118 435358878 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0
   24 435358902 [main] redis-server 5908 lseek64: 0 = lseek (3, 0, 1)
2489222 437848124 [main] redis-server 5908 fhandler_base::lseek: setting file pointer to 0