Dear K.Yodying,
Here is our findings and please continue work on the hardware diagnostics on next week.
Total RAM size for these cache boxes is 32G, but max memory cache size had set to 61.04GB.
We will have to reduce the memory cache size on next week and that required proxy restart for all the boxes.
We will have to restart these boxes one by one to fix the cache mem size issue.
For 111.202 box could possibly caused by the cache memory size issue but we will still continue check on the hardwares on next week.
Please download the iso image below and burn it onto a DVD. We will need to boot up to the DVD to run the hardware diagnostics.