Dan Lipofsky created SLF4J-425:
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Summary: stack trace is logged despite exception matching a
parameter in format string
Key: SLF4J-425
URL: https://jira.qos.ch/browse/SLF4J-425
Project: SLF4J
Issue Type: Bug
Components: Core API
Affects Versions: 1.7.25
Environment: Slf4j 1.7.25
Logback 1.2.3
SpringBoot 1.5.9
Java 1.8.0_121
Reporter: Dan Lipofsky
Assignee: SLF4J developers list
Priority: Minor
I want to pass an exception into a parameterized log call and have it *not* log
the stacktrace.
According to the [FAQ|https://www.slf4j.org/faq.html#paramException] "If the
exception is not the last argument, it will be treated as a plain object and
its stack trace will NOT be printed." which is exactly what I want.
{{But when I try}}
{{LOG.info("foo \{} bar \{}", "xxx", new RuntimeException("ZZZ"));}}
{{I get}}
{{2018-01-02 15:52:40.637 INFO [main] com.foo.Bar foo xxx bar \{}}}
{{java.lang.RuntimeException: ZZZ}}
{{ at com.foo.Bar.<init>(Bar.java:37)}}
{{ ...}}
so it does not substitute that last parameter and it creates an unwanted
stacktrace.
I can work around this by manually calling toString() but this
* defeats the efficiencies of using a parameterized call
* probably makes my static analysis tool warn that the exception has not been
logged
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