Hi Brijesh,
I just checked my local wM 9.12 installation and I found a log4j.jar under /common/lib/ext with version 1.2.16.
I doubt that this can be used together with log4j2 jars.
Most likely the wM 10.x stream is using log4j2 itself, so there is a lesser risk for compatibility issues.
Just checking my 10.7 Trial installation, these one seems to come with log4j2 2.10/2.13.
If you rely on newer functions from log4j2, which are not available in log4j v1, and the log4j v1 jar (from IS installation) is loaded before your custom log4j2 jars, you are definitely hitting a classpath loading conflict.
Regards,
Holger
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