Re: POI 5.0 slf4j conflict with commons-logging

Hi,

Apache POI 5.0.0 uses a dependency on slf4j-api
<https://mvnrepository.com/artifact/org.slf4j/slf4j-api> to use slf4j as
core logging framework in Apache POI.

It also includes a dependency to jcl-over-slf4j
<https://mvnrepository.com/artifact/org.slf4j/jcl-over-slf4j> to redirect
logs of third-party libraries that are using commons-logging via slf4j
instead.

You should be able to either make sure that commons-logging is included
first in the classpath or exclude the transitive dependency on
jcl-over-slf4j when depending on Apache POI to make sure that
commons-logging is used again.

BTW, POI 5.1.0 will switch once again to Log4j and depending on
commons-logging, so the next release should work better for your use-case
again out of the box.

Dominik.

On Sun, Aug 29, 2021 at 4:20 PM sriram .v <[email protected]> wrote:

> We have a multichild project with a parent maven Project.
> We have many child project using both commons-logging and POI. Spring boot
> project is also using JCL.
> So We have conflict with the SLF4J and Commons-logging in class loader
> after upgrading POI to 5.0.
> What will be the effect if we exclude jcl-over-slf4j. Will POI use
> commons-logging without any issues?
>
>
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