ERRO AO ASSINAR APK

Ola boa noite, amigos preciso de uma ajuda.
tou tentando assinar um apk mais o seguinte retorna

keytool -genkey -v -keystore C:\Android\apk\keystore.keystore -alias canto -keyalg RSA -keysize 2048 -validity 1000

ou

keytool -genkey -v -keystore C:\Android\apk\keystore.keystore -alias canto -keyalg RSA -keysize 2048 -validity 10000

ambos da o mesmo erro

Problema ta no meu keystore ou no meu java ?

ERRO :

signing: res/drawable-xxhdpi/powered_by_google_dark.png
signing: res/drawable-xxhdpi/powered_by_google_light.png
signing: res/layout/dialog.xml
signing: res/layout/noti_big.xml
signing: res/layout/playerfinal.xml
signing: res/layout/splashscreen.xml
signing: res/layout/webview.xml
signing: AndroidManifest.xml
signing: classes.dex
signing: resources.arsc
jar signed.

Warning:
No -tsa or -tsacert is provided and this jar is not timestamped. Without a timestamp, users may not be able to validate this jar after the signer certificate's expiration date (2019-09-21) or after any future revocation date.

C:\Program Files\Java\jdk1.8.0_111\bin>