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Nifi 1.8 secure instalation problems with sensitive properties

Nifi 1.8 secure instalation problems with sensitive properties

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I run Nifi 1.8 without a problem. I wanted to change it to HTTPS, so I created a keystore and truststore. When I run it again, it gives me the next error:

org.apache.nifi.encrypt.StringEncryptor ********************************************************************************
org.apache.nifi.encrypt.StringEncryptor * A blank sensitive properties key was provided *
org.apache.nifi.encrypt.StringEncryptor * Specify a unique key in nifi.properties *
org.apache.nifi.encrypt.StringEncryptor * for nifi.sensitive.props.key *
org.apache.nifi.encrypt.StringEncryptor * *
org.apache.nifi.encrypt.StringEncryptor * The Encrypt Config Tool in NiFi Toolkit can be used to *
org.apache.nifi.encrypt.StringEncryptor * migrate the flow to the new key *
org.apache.nifi.encrypt.StringEncryptor ********************************************************************************

Do I need to use the Nifi-toolkit to migrate the nifi.properties, the security properties, before use it? This Nifi is a new instance, no flows was created.