Why does linux du command print no result and occupy one 100 CPU usage

The Problem

Today, My colleague found an abnormal problem and asked me the reason. I recorded the following analysis steps.

This problem is that linux du command does not print the results, and at the same time, the process of du command occupies 100% CPU usage. Result of top command is the following:

# top
  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                    
36343 root      20   0  110m  13m 1780 R 99.8  0.0   1:37.66 du                                                                                                         
36370 root      20   0  110m  13m 1780 R 94.2  0.0   1:20.98 du
   86 root ...

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Howto Stop Bind writing log to system messages

Bind is open source software that implements the Domain Name System (DNS) protocols for the Internet, Many Companies have used it. This article discusses the logging function of Bind. by default configuration, Bind writes logging to Linux system messages in /var/log/messages directory like:

 Jun 13 10:10:09 Test_Host named[19304]: success resolving 'ns4.servodns.com/A' (in 'servodns.com'?) after reducing the advertised EDNS UDP packet size to 512 octets
 Jun 13 10:10:09 Test_Host named[19304]: success resolving 'ns4.servodns.com/AAAA' (in 'servodns.com'?) after reducing the advertised EDNS UDP packet size to 512 ...

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