Where can I see the error log?

Where to read the error log

Error log viewing guide

1. Viewing method

Error logs are usually stored in the application's log file, and the specific path varies from application to application. The following are some common viewing methods:

• Console: Some applications will output error logs on the console, which can be viewed by opening the application's console window.
• Log file: Most applications will write error logs to specific log files. The path to the log file can usually be found in the application's configuration file or documentation.
• Log aggregation tools: Log aggregation tools such as Splunk and ELK Stack can collect and centrally display error logs from different applications.

2. Log file path

The following are the default log file paths for several common applications:

• Java: ./logs/application.log
• Python: ./logs/application.log
• Node.js：./logs/application.log
• Spring Boot：./logs/spring.log
• Tomcat: ./logs/catalina.out

3. Check the specific error report

After finding the log file, you can check the specific error report through the following steps:

• Locate the error message: Search in the log file for words such as "ERROR" and "EXCEPTION" " or "FATAL" keywords, these usually indicate errors.
• View the error stack: The error message will usually include a stack trace that shows the line of code that caused the error.
• Analyze the error message: Read the error message carefully to understand the nature of the error and possible causes.

4. Follow-up steps

After checking the error log, you usually need to take the following follow-up steps:

• Identification Cause of error: Analyze the error message and determine the root cause of the error.
• Fix errors: Modify the application code or configuration according to the cause of the error.
• Retest the application: After fixing the error, retest the application to make sure the issue is resolved.

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