options are inserted multiple times during execution of jarsigner

While Signing jars with pkcs12 http.proxyHost and http.proxyPort options are inserted multiple times during execution of jarsigner. Finally in one of iteration build will fail due to command length.

[DEBUG] Executing: cmd.exe /X /C ""C:\Program Files\Java\jdk1.7.0_80\jre\..\bin\jarsigner.exe" -verbose -keystore C:\repo\app\src\main\jnlp\app.pfx -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org -J-Dhttp.proxyPort=80 -J-Dhttp.proxyHost=some.address.org ...

<sign> <keystore>src/main/jnlp/app.pfx</keystore> <storepass>****</storepass> <storetype>pkcs12</storetype> <alias>app-alias</alias> <verify>true</verify> <tsaLocation>http://timestamp.digicert.com</tsaLocation> <httpProxyHost>some.address.org</httpProxyHost> <httpProxyPort>80</httpProxyPort> </sign>

[WARNING] The command line is too long. [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------