After configuring logging.pattern.file=%d{HH:mm:ss} %-5level %msg%n, your log file entries lack timestamps. What should you verify first?

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Spring Boot - Logging

After configuring logging.pattern.file=%d{HH:mm:ss} %-5level %msg%n, your log file entries lack timestamps. What should you verify first?

AThat the log level is set to DEBUG

BThat the console pattern is set to include timestamps

CThat the logging file appender is enabled and uses the pattern

DThat the application.properties file is in the classpath

Step-by-Step Solution

Solution:

Step 1: Confirm file appender usage
Even if the pattern is set, if the file appender is not enabled or configured to use it, timestamps won't appear.
Step 2: Console pattern irrelevant for file logs
Console pattern does not affect file output.
Step 3: Log level affects message filtering, not timestamp display
Incorrect log level won't remove timestamps.
Step 4: application.properties location is important but usually not the cause if logs appear
If logs exist but lack timestamps, config is partially applied.
Final Answer:
That the logging file appender is enabled and uses the pattern -> Option C
Quick Check:
File appender must be active and use the pattern [OK]

Quick Trick: File appender must be active to apply file log pattern [OK]

Common Mistakes:

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