@Override
        protected boolean commit(boolean dryRun) throws IOException, TerseException {
            if (startSync(dryRun, location(), initial, manifests)) {
                rewriteJar(dryRun, location(), manifests);
                return true;
            }
            return false;
        }
A single jar can only contain one manifest per plugin type.
tools/src/main/java/org/apache/kafka/tools/ManifestWorkspace.java