IJ slf4j logging issue

[jamoore]

Running 5.0.0-rc1 with Imagej1.47:

jamoore@blue:/tmp/BF/ij/ImageJ$ sh run
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/tmp/BF/ij/ImageJ/plugins/OMERO.insight-ij-5.0.0-rc1-ice33-b10/libs/slf4j-log4j12.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/tmp/BF/ij/ImageJ/plugins/loci_tools.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

[jamoore]

Is this something we can try to resolve for 5.0.0? Or does it need to be pushed?

[bpindelski]

I've assigned the ticket to me to verity that it still happens and see if there is a quick solution to this issue. If the problem is more complex than I anticipate it to be, then it can definitely be pushed to 5.1 or 5.0.1.

[jamoore]

Sorry, Blazej. My edit overwrote yours. Fixing.

[bpindelski]

This still happens with ​http://ci.openmicroscopy.org/job/OMERO-5.0-merge-daily/lastSuccessfulBuild/artifact/src/target/OMERO.insight-ij-5.0.0-rc1-207-36220ac-ice33-b556.zip and the latest loci_tools.jar. The OMERO-insight-ij.zip file contains a libs directory, which in turn contains the slf4j-log4j.jar file - this file in turn causes the "multiple bindings" warning. One way of solving this would be to conditionally exclude the log4j binding on creation of the zip file.

[jamoore]

Perhaps that means that on cblackburn's current SLF4J branch this won't happen?

[bpindelski]

Assigning to Colin for further review.

[sbesson]

See ​https://github.com/openmicroscopy/openmicroscopy/pull/2043 and ​https://github.com/openmicroscopy/bioformats/pull/880

ome_tools.jar now contains as much as loci_tools.jar except slfj4-log4j and log4j and should be the JAR to associate with the OMERO.insight-ij plugin