mpwong852 opened a new issue, #2868:
URL: https://github.com/apache/logging-log4j2/issues/2868
Before I only use below "dependencies"
```
[INFO] +- org.apache.logging.log4j:log4j-core:jar:2.20.0:compile
[INFO] \- org.apache.logging.log4j:log4j-1.2-api:jar:2.20.0:compile
[INFO] \- org.apache.logging.log4j:log4j-api:jar:2.20.0:compile
```
It doesn't show me "ERROR StatusLogger Unrecognized format specifier [d]"
After I update to "**2.21.0**", it start show me "ERROR StatusLogger
Unrecognized format specifier [d]"
```
ERROR StatusLogger Unrecognized format specifier [d]
ERROR StatusLogger Unrecognized conversion specifier [d] starting at
position 16 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [thread]
ERROR StatusLogger Unrecognized conversion specifier [thread] starting at
position 25 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [level]
ERROR StatusLogger Unrecognized conversion specifier [level] starting at
position 35 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [logger]
ERROR StatusLogger Unrecognized conversion specifier [logger] starting at
position 47 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [msg]
ERROR StatusLogger Unrecognized conversion specifier [msg] starting at
position 54 in conversion pattern.
ERROR StatusLogger Unrecognized format specifier [n]
ERROR StatusLogger Unrecognized conversion specifier [n] starting at
position 56 in conversion pattern.
```
To fix this, I need to use plugin to merges Log4j2Plugins.dat plugin caches
from all the jars containing Log4j 2.x Core components.
ref :
https://logging.apache.org/log4j/transform/latest/#log4j-plugin-cache-transformer
I have already apply this solution on 2.21.0 to solve my problems.
**The question is why I need to use plugin to fix this issue ? What is the
change in 2.21.0 causing Log4j2Plugins.dat have problems ? Any solution for me
not using that plugin ?**
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