need offline log analyzer

[markzhai]

Analyze log files and output to readable format.

For analyze, I consider:

1. parse stacktrace
2. rank
3. category

Any language can be fine, as it's done offline on pc or server.

[YellowQC]

Analyze on server should be better.The classification of the block info needs to calculate the similarty of stack trace string ,which cost a lot of time.