I accidentally deleted the S3 Bucket and Access Keys which were used by the nexus-blobstore-s3 plugin and then Nexus OSS 3.14.0 server could not start anymore.
2018-10-17 15:05:56,530+0530 ERROR [FelixStartLevel] *SYSTEM org.sonatype.nexus.repository.internal.blobstore.BlobStoreManagerImpl - Failed transition: NEW -> STARTED org.sonatype.nexus.blobstore.api.BlobStoreException: Unable to initialize blob store bucket: zone-nexus-s3, Cause: The AWS Access Key Id you provided does not exist in our records. (Service: Amazon S3; Status Code: 403; Error Code: InvalidAccessKeyId; Request ID: 602E25272A7277D3; S3 Extended Request ID: 0KoHw+4u6aJqwdl+zhsph3yR+UQJ6IG1iXqpHIkKZD/K7rCMlhp+CI9Yx/AtS5QpFkGJ86cBEXk=)
3.1. Launch the OrientDB console using the same version of Java executable that Nexus is using.
You should be presented with a command-line interface such as this, ready to accept your commands.
3.2. Connect to the Nexus OrientDB database.
3.3. Export the database as a JSON file.
Read the exported database using a text editor, and you will find a JSON data set as follows. The complete nexus_database.json can be found here.
Updated AWS S3 Configurations
3.4. Update the necessary nexus properties. I'm updating bucket, accessKeyId, secretAccessKey and region properties which need to modify according to the updated nexus configurations.
3.5. Disconnect and exit from the Nexus OrientDB database.
3.6. Provide necessary permissions to the Nexus OrientDB database.
3.7. Restart Nexus server.
3.8. Monitor Nexus service logs.