Analysis of SmartCloud entry logs

This article mainly introduces the IBM http://www.aliyun.com/zixun/aggregation/13696.html ">smartcloud Entry log, including the use of the log frame, log structure and log analysis, Help the user in the process of using SmartCloud Entry in the case of problems, fast positioning.

There are a lot of popular log frameworks, such as log4j, SLF4J, Apache common-logging, and so on, each framework is used and configured in a different way, in SmartCloud Entry, we use the JDK's own log tool to form the system's log.

We get a named Logger by Java.util.logging.Logger.getLogger (String name), and then we can call our respective methods to output the log separately.

The level of the log is progressively off, SEVERE, WARNING, INFO, FINE, Finer, FINEST, and all, and as the level increases, so does the log information.

Listing 1. How to output a log

Import java.util.logging.Logger Logger Logger = Logger.getlogger ("Wpf-test"); Logger.fine ("This are a fine message");

Log configuration

Smarycloud Entry The default log configuration is provided through the configuration file Log.properies is located in the installed configuration directory, and the default configuration is as follows:

Listing 2. Log default configuration

# This are the main logging.properties for the CFS API creator Handlers=java.util.logging.consolehandler, Java.util.logging.FileHandler # Default Global logging level. . Level=fine # Default Global logging level for the console handler. Java.util.logging.consolehandler.level=info java.util.logging.consolehandler.formatter= Java.util.logging.SimpleFormatter Java.util.logging.filehandler.pattern=%h/.skc/logs/skc-%g.log Java.util.logging.filehandler.count=9 java.util.logging.filehandler.limit=50000000 Java.util.logging.filehandler.append=true

The default log level is FINE, but if we need to analyze some of the issues, often need to provide more detailed log, you can adjust the output to the log level of the file to achieve the following methods:

java.util.logging.filehandler.level=finest

From other configuration items, we can see that the system defaults to store the log in the user directory under the/.skc/logs, while each log file maximum of 50M, up to 9 log files, log files are named by the combination of SKC and numbers, Skc-0.log for the latest log files, such as

Figure 1. Log file List