Log more when preprocessing fails

2 files changed, 18 insertions, 17 deletions

diff --git a/config-application-package/src/main/java/com/yahoo/config/model/application/provider/FilesApplicationPackage.java b/config-application-package/src/main/java/com/yahoo/config/model/application/provider/FilesApplicationPackage.java
index 6aa8f8bf1a1..1bdedc503bf 100644
--- a/config-application-package/src/main/java/com/yahoo/config/model/application/provider/FilesApplicationPackage.java
+++ b/config-application-package/src/main/java/com/yahoo/config/model/application/provider/FilesApplicationPackage.java
@@ -1,4 +1,4 @@
-// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.config.model.application.provider;
 
 import com.yahoo.component.Version;
@@ -601,28 +601,32 @@ public class FilesApplicationPackage implements ApplicationPackage {
         return searchDefinitionContents();
     }
 
-    private void preprocessXML(File destination, File inputXml, Zone zone) throws ParserConfigurationException, TransformerException, SAXException, IOException {
-        Document document = new XmlPreProcessor(appDir,
-                                                inputXml,
-                                                metaData.getApplicationId().instance(),
-                                                zone.environment(),
-                                                zone.region()).run();
-        Transformer transformer = TransformerFactory.newInstance().newTransformer();
-        try (FileOutputStream outputStream = new FileOutputStream(destination)) {
-            transformer.transform(new DOMSource(document), new StreamResult(outputStream));
+    private void preprocessXML(File destination, File inputXml, Zone zone) throws IOException {
+        if ( ! inputXml.exists()) return;
+        try {
+            Document document = new XmlPreProcessor(appDir,
+                                                    inputXml,
+                                                    metaData.getApplicationId().instance(),
+                                                    zone.environment(),
+                                                    zone.region()).run();
+            Transformer transformer = TransformerFactory.newInstance().newTransformer();
+            try (FileOutputStream outputStream = new FileOutputStream(destination)) {
+                transformer.transform(new DOMSource(document), new StreamResult(outputStream));
+            }
+        } catch (TransformerException |ParserConfigurationException | SAXException e) {
+            throw new RuntimeException("Error preprocessing " + inputXml.getAbsolutePath() + ": " + e.getMessage(), e);
         }
     }
 
     @Override
-    public ApplicationPackage preprocess(Zone zone, DeployLogger logger) throws IOException, TransformerException, ParserConfigurationException, SAXException {
+    public ApplicationPackage preprocess(Zone zone, DeployLogger logger) throws IOException {
         IOUtils.recursiveDeleteDir(preprocessedDir);
         IOUtils.copyDirectory(appDir, preprocessedDir, -1, (dir, name) -> ! name.equals(preprocessed) &&
                                                                                          ! name.equals(SERVICES) &&
                                                                                          ! name.equals(HOSTS) &&
                                                                                          ! name.equals(CONFIG_DEFINITIONS_DIR));
         preprocessXML(new File(preprocessedDir, SERVICES), getServicesFile(), zone);
-        if (getHostsFile().exists())
-            preprocessXML(new File(preprocessedDir, HOSTS), getHostsFile(), zone);
+        preprocessXML(new File(preprocessedDir, HOSTS), getHostsFile(), zone);
         FilesApplicationPackage preprocessed = FilesApplicationPackage.fromFile(preprocessedDir, includeSourceFiles);
         preprocessed.copyUserDefsIntoApplication();
         return preprocessed;
diff --git a/config-application-package/src/test/java/com/yahoo/config/model/application/provider/FilesApplicationPackageTest.java b/config-application-package/src/test/java/com/yahoo/config/model/application/provider/FilesApplicationPackageTest.java
index be4d8fdab25..dcc75fff540 100644
--- a/config-application-package/src/test/java/com/yahoo/config/model/application/provider/FilesApplicationPackageTest.java
+++ b/config-application-package/src/test/java/com/yahoo/config/model/application/provider/FilesApplicationPackageTest.java
@@ -10,10 +10,7 @@ import com.yahoo.io.IOUtils;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
-import org.xml.sax.SAXException;
 
-import javax.xml.parsers.ParserConfigurationException;
-import javax.xml.transform.TransformerException;
 import java.io.File;
 import java.io.FileReader;
 import java.io.IOException;
@@ -32,7 +29,7 @@ public class FilesApplicationPackageTest {
     public TemporaryFolder temporaryFolder = new TemporaryFolder();
 
     @Test
-    public void testPreprocessing() throws IOException, TransformerException, ParserConfigurationException, SAXException {
+    public void testPreprocessing() throws IOException {
         File appDir = temporaryFolder.newFolder();
         IOUtils.copyDirectory(new File("src/test/resources/multienvapp"), appDir);
         assertTrue(new File(appDir, "services.xml").exists());