NIFI-14975 Fail Registry startup if nifi-registry-api Handler throws Exception (#10309)

Signed-off-by: David Handermann <[email protected]>

Author: mosermw

nifi-registry/nifi-registry-core/nifi-registry-jetty/src/main/java/org/apache/nifi/registry/jetty/handler/StandardHandlerProvider.java

@@ -110,6 +110,7 @@ public Handler getHandler(final NiFiRegistryProperties properties) {
         final ClassLoader apiClassLoader = getApiClassLoader(properties.getDatabaseDriverDirectory());
         final WebAppContext apiContext = getWebAppContext(libDirectory, workDirectory, apiClassLoader, API_FILE_PATTERN, API_CONTEXT_PATH);
         apiContext.setAttribute(PROPERTIES_PARAMETER, properties);
+        apiContext.setThrowUnavailableOnStartupException(true);
         handlers.addHandler(apiContext);
 
         final WebAppContext docsContext = getWebAppContext(libDirectory, workDirectory, ClassLoader.getSystemClassLoader(), DOCS_FILE_PATTERN, DOCS_CONTEXT_PATH);