jar references in tmp/vfs consuming file handles

I see deployments in standalone/tmp/vfs/deployment1bdffd9028e55f79 that keep reference to multiple instances of the jars like

joda-time-1.6.2.jar-38f02aa25a811ed4
joda-time-1.6.2.jar-74d1519d59ff978d
joda-time-1.6.2.jar-b197315704b17d7
joda-time-1.6.2.jar-bc1bb40870af7097

3-4 of each jar and they all consume a file handle on OS level. Are they all needed?

all in all, the AS takes up around 1000 file handles on 4 deployed applications, causing out of file handles-errors if more applications are deployed without raising the limits.