[keycloak-dev] NullPointerException with empty attribute

[Stian Thorgersen]

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On 20 April 2017 at 16:57, Rains, Chris <Chris.Rains at jtv.com> wrote:

> Hi,
>
> I’m seeing Keycloak throw a NullPointerException whenever an access token
> is being generated for a user with an empty attribute value. Here’s a
> snippet of the stack trace:
>
> Caused By: java.lang.NullPointerException
> at org.keycloak.protocol.oidc.mappers.OIDCAttributeMapperHelper.
> convertToType(OIDCAttributeMapperHelper.java:103)
> at org.keycloak.protocol.oidc.mappers.OIDCAttributeMapperHelper.
> mapAttributeValue(OIDCAttributeMapperHelper.java:77)
> at org.keycloak.protocol.oidc.mappers.OIDCAttributeMapperHelper.mapClaim(
> OIDCAttributeMapperHelper.java:147)
> at org.keycloak.protocol.oidc.mappers.UserAttributeMapper.
> setClaim(UserAttributeMapper.java:98)
> at org.keycloak.protocol.oidc.mappers.AbstractOIDCProtocolMapper.
> transformAccessToken(AbstractOIDCProtocolMapper.java:81)
> at org.keycloak.protocol.oidc.TokenManager.transformAccessToken(
> TokenManager.java:520)
> at org.keycloak.protocol.oidc.TokenManager.createClientAccessToken(
> TokenManager.java:324)
> at org.keycloak.protocol.oidc.TokenManager$AccessTokenResponseBuilder.
> generateAccessToken(TokenManager.java:674)
>
> Looking at OIDCAttributeMapperHelper.java, this seems to be happening
> because no null check is being performed on attributeValue in
> convertToType. Therefore, I think we would just need to add a null check at
> the beginning of convertToType:
>
> if (attributeValue == null) return null;
>
> Would this be a reasonable solution?
>
> Thanks!
> - Chris Rains
>
>
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