Re: [netcdfgroup] Obsolete logging dependency in toolsUI.jar

• To: Valliappa Lakshmanan <valliappa.lakshmanan@xxxxxxxx>
• Subject: Re: [netcdfgroup] Obsolete logging dependency in toolsUI.jar
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Wed, 21 Jan 2009 10:01:44 -0700

Hi Lak:

Try leaving out log4j.jar and just use nlog4j.jar.

Thanks for reporting, I am looking at upgrading nlog4j to use the unbundled
slf4j libraries. One problem is that log4j version 1.3 has been abandoned.


Valliappa Lakshmanan wrote:
> I tried  toolsUI-4.0.jar because I was having problems getting earlier
> versions of the netcdf API to read Grib2 files.
>
> However, the toolsUI version seems to have a logging problem, and when I run
> my code (which uses log4j via Apache Commons), I get the following
> exception:
>
>   [java] Exception in thread "main" java.lang.IncompatibleClassChangeError:
> Class org.apache.log4j.Logger does not implement the requested interface
> org.slf4j.Logger
>      [java]     at ucar.nc2.NetcdfFile.open(NetcdfFile.java:635)
>      [java]     at ucar.nc2.NetcdfFile.open(NetcdfFile.java:335)
>      [java]     at ucar.nc2.NetcdfFile.open(NetcdfFile.java:305)
>      [java]     at ucar.nc2.NetcdfFile.open(NetcdfFile.java:292)
>      [java]     at ucar.nc2.NetcdfFile.open(NetcdfFile.java:280)
>
> ( I do have slf4j-api-1.1.0.jar and slf4j-log4j12-1.1.0.jar in my classpath
> )
>
> Searching on the internet for the error indicates (see:
> http://www.nabble.com/Trying-to-use-log4j-over-slf4j-td20249172.html )
> that it's because toolsUI.jar bundles the contents of nlog4.jar which is
> obsolete.
>
> I can avoid the error by using netcdf-4.0.jar (which is what I did), but
> thought I'd report the problem.
>
> Lak
>
>
>
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• References:
  • [netcdfgroup] Obsolete logging dependency in toolsUI.jar
    • From: V Lakshmanan