Number of placeholders does not match number of arguments in logging call
Reports SLF4J, Log4j2 and akka.event.LoggingAdapter logging calls, such as logger.info("{}: {}", key) where the number of {} placeholders in the logger message doesn't match the number of other arguments to the logging call.
Locating this inspection
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
LoggingPlaceholderCountMatchesArgumentCount- Via Settings dialog
Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.
Use the inspection option to specify which implementation SLF4J uses. If Check automatically is chosen, then org.apache.logging.slf4j.Log4jLogger is searched in the classpath. If this file is founded or Yes is chosen, then cases, when the last parameter with an exception type has a placeholder, will not be reported for SLFJ4 API.
For example:
In this case 'new RuntimeException()' will be printed using 'toString()', (its stacktrace will not be printed):
Otherwise, it will be highlighted because the last placeholder is not used:
No option can be used to always highlight such cases when a placeholder is used for an exception even if org.apache.logging.slf4j.Log4jLogger is used as a backend. This option works only for SLF4J.
Inspection options
Here you can find the description of settings available for the Number of placeholders does not match number of arguments in logging call inspection, and the reference of their default values.
- SLF4J uses Log4j 2 as implementation
Default setting: Check automatically
Other available settings:
No
Yes
Availability
- By default bundled with
- Can be installed with plugin
Java, 241.18072