[slf4j-user] slf4j-api cannot be loaded into Oracle 23ai

[Armand Bozsik]

Hello,

*Describe the bug*

Password4j 1.8.2 cannot be loaded under Oracle 23ai free because most of
the time ora-29532 java call terminated by uncaught java exception
java.lang.noclassdeffounderror org/slf4j/loggerfactory happens.


*To Reproduce *Try to load slf4j-api and then password4j 1.8.2/1.8.3 into
Oracle database via

loadjava -r -v -f -s -g "$SCHEMA_NAME" -resolve -user
"$SCHEMA_NAME/$SCHEMA_PASSWORD@$CONTAINER_NAME" "$jar_file"
loadjava -r -v -f -s -g "$SCHEMA_NAME" -append-resolver "((* -))"
-jarsasdbobjects -user "$SCHEMA_NAME/$SCHEMA_PASSWORD@$CONTAINER_NAME"
"$jar_file"
loadjava -v -thin -user "$SCHEMA_NAME/$SCHEMA_PASSWORD@$CONTAINER_NAME"
"$jar_file"

(The examples are from a shell script of mine)

You will most likely get

ora-29532 java call terminated by uncaught java exception
java.lang.noclassdeffounderror org/slf4j/loggerfactory

when you try to run an Argon2 implementation from Password4j, even though
slf4j-api is loaded. I did not experience any change by upgrading to 1.8.3,
sadly. Maybe I do something not the way it was meant to be. With the -v
-thin -user flags it works under 19c.


*Expected behavior *I expect to use the Password4j library in my project
after load.

Environment:

OS: Oracle Linux 8 in docker
DB: Oracle 23ai free
JDK version:

In the database:
SELECT dbms_java.get_ojvm_property(PROPSTRING=>'java.version') FROM dual
11.0.27

On OL8:

java -version
openjdk version "17.0.15" 2025-04-15 LTS
OpenJDK Runtime Environment (Red_Hat-17.0.15.0.6-2.0.1) (build
17.0.15+6-LTS)
OpenJDK 64-Bit Server VM (Red_Hat-17.0.15.0.6-2.0.1) (build 17.0.15+6-LTS,
mixed mode, sharing)

Additional context
Most of the classes are loaded as org.slf4j///org/slf4j/... but they should
be org/slf4j/...

For instance:

org.slf4j///org/slf4j/loggerfactory and org/slf4j/LoggerFactory

If you need anything to uncover this, I will gladly help. Thanks! :) Would
it be possible to load the jar normally, so without module info? Could you
build a jar without modules for testing purposes?

Thanks!
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