Beginning Hibernate 3.5 - Problems with ant task
Solution 1
Here solves what you want
Mixing mixing different versions of slf4j artifacts can cause problems. For example, if you are using slf4j-api-1.6.1.jar, then you should also use slf4j-simple-1.6.1.jar, using slf4j-simple-1.5.5.jar will not work.
In general, you should make sure that the slf4j-api version matches that of the slf4j binding.
At initialization time, if SLF4J suspects that there may be a version mismatch problem, it will emit a warning about the suspected mismatch. For the exact details of the version mismatch detection mechanism, please refer to the relevant entry in the FAQ.
Solution 2
Here's an example I came across of the SLF4J start up warning when you've got incompatible slf4j versions:
SLF4J: The requested version 1.5.10 by your slf4j binding is not compatible with [1.6] SLF4J: See http://www.slf4j.org/codes.html#version_mismatch for further details.
Stefan Kendall
Updated on June 04, 2022Comments
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Stefan Kendall almost 2 years
I'm trying to work through "Beginning Hibernate 3.5", and I've hit an initial snag.
When I run
ant exportDDL
, I get the following error:exportDDL: [htools] Executing Hibernate Tool with a Hibernate Annotation/EJB3 Configuration [htools] 1. task: hbm2ddl (Generates database schema) [htools] SLF4J: The requested version 1.6 by your slf4j binding is not compatible with [1.5.5, 1.5.6, 1.5.7, 1.5.8] [htools] SLF4J: See http://www.slf4j.org/codes.html#version_mismatch for further details. [htools] An exception occurred while running exporter #2:hbm2ddl (Generates database schema) [htools] To get the full stack trace run ant with -verbose [htools] Problems in creating a AnnotationConfiguration. Have you remembered to add it to the classpath ? [htools] java.lang.NoSuchMethodError: org.slf4j.helpers.MessageFormatter.format(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)Lorg/slf4j/helpers/FormattingTuple; BUILD FAILED C:\hibernate\project\build.xml:30: Problems in creating a AnnotationConfiguration. Have you remembered to add it to the classpath ?
with the following ant task:
<target name="exportDDL" depends="compile"> <mkdir dir="${sql}"/> <htools destdir="${sql}"> <classpath refid="classpath.tools"/> <annotationconfiguration configurationfile="${src}/hibernate.cfg.xml"/> <hbm2ddl drop="true" outputfilename="sample.sql"/> </htools> </target> <target name="compile"> <javac srcdir="${src}" destdir="${bin}" classpathref="classpath.base"/> </target>
What's going on here?
ant compile
works fine, but theexportDDL
task does not. The sl4j jar is on the classpath, and I downloadedslf4j-simple-1.6.1.jar
. Thoughts? -
Stefan Kendall over 13 yearsYup. Looks like sl4j-api-1.5.8