diff --git a/core/src/main/java/org/mapfish/print/config/ConfigurationFactory.java b/core/src/main/java/org/mapfish/print/config/ConfigurationFactory.java
index c97a449322..557cd0cbf7 100644
--- a/core/src/main/java/org/mapfish/print/config/ConfigurationFactory.java
+++ b/core/src/main/java/org/mapfish/print/config/ConfigurationFactory.java
@@ -6,6 +6,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 import javax.annotation.PostConstruct;
 import org.slf4j.Logger;
@@ -63,7 +64,8 @@ public final Configuration getConfig(final File configFile, final InputStream co
     configuration.setConfigurationFile(configFile);
     MapfishPrintConstructor.setConfigurationUnderConstruction(configuration);
 
-    final Configuration config = this.yaml.load(new InputStreamReader(configData, "UTF-8"));
+    final Configuration config =
+        this.yaml.load(new InputStreamReader(configData, StandardCharsets.UTF_8));
     if (this.doValidation) {
       final List<Throwable> validate = config.validate();
       if (!validate.isEmpty()) {
diff --git a/core/src/main/java/org/mapfish/print/map/style/SLDParserPlugin.java b/core/src/main/java/org/mapfish/print/map/style/SLDParserPlugin.java
index aa1941d861..a42804a079 100644
--- a/core/src/main/java/org/mapfish/print/map/style/SLDParserPlugin.java
+++ b/core/src/main/java/org/mapfish/print/map/style/SLDParserPlugin.java
@@ -5,6 +5,7 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
+import java.nio.charset.Charset;
 import java.util.Optional;
 import java.util.function.Function;
 import javax.annotation.Nonnull;
@@ -39,6 +40,8 @@ public class SLDParserPlugin implements StyleParserPlugin {
    */
   public static final String STYLE_INDEX_REF_SEPARATOR = "##";
 
+  public static final String RASTER = "raster";
+
   @Override
   public final Optional<Style> parseStyle(
       @Nullable final Configuration configuration,
@@ -85,6 +88,9 @@ private Optional<Style> tryLoadSLD(
     Assert.isTrue(
         styleIndex == null || styleIndex > -1, "styleIndex must be > -1 but was: " + styleIndex);
 
+    if (RASTER.equals(new String(bytes, Charset.defaultCharset()))) {
+      return Optional.empty();
+    }
     final Style[] styles;
     try {
 
@@ -163,27 +169,19 @@ public static class ErrorHandler extends DefaultHandler {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(ErrorHandler.class);
 
-    /**
-     * @param e Exception
-     */
     public final void error(final SAXParseException e) throws SAXException {
-      LOGGER.debug("XML error: {}", e.getLocalizedMessage());
+      LOGGER.warn("XML error: {}", e.getLocalizedMessage(), e);
       super.error(e);
     }
 
-    /**
-     * @param e Exception
-     */
     public final void fatalError(final SAXParseException e) throws SAXException {
-      LOGGER.debug("XML fatal error: {}", e.getLocalizedMessage());
+      LOGGER.warn("XML fatal error: {}", e.getLocalizedMessage(), e);
       super.fatalError(e);
     }
 
-    /**
-     * @param e Exception
-     */
-    public final void warning(final SAXParseException e) {
-      // ignore
+    public final void warning(final SAXParseException e) throws SAXException {
+      LOGGER.warn("XML warning: {}", e.getLocalizedMessage(), e);
+      super.warning(e);
     }
   }
 }
diff --git a/core/src/main/java/org/mapfish/print/servlet/job/impl/ThreadPoolJobManager.java b/core/src/main/java/org/mapfish/print/servlet/job/impl/ThreadPoolJobManager.java
index 2126485820..8307e2dcb0 100644
--- a/core/src/main/java/org/mapfish/print/servlet/job/impl/ThreadPoolJobManager.java
+++ b/core/src/main/java/org/mapfish/print/servlet/job/impl/ThreadPoolJobManager.java
@@ -291,6 +291,18 @@ public final void shutdown() {
   }
 
   private void executeJob(final PrintJob job) {
+    LOGGER.debug(
+        "executeJob {}, PoolSize {}, CorePoolSize {}, Active {}, Completed {}, Task {}, isShutdown"
+            + " {}, isTerminated {}",
+        job,
+        this.executor.getPoolSize(),
+        this.executor.getCorePoolSize(),
+        this.executor.getActiveCount(),
+        this.executor.getCompletedTaskCount(),
+        this.executor.getTaskCount(),
+        this.executor.isShutdown(),
+        this.executor.isTerminated());
+
     final Future<PrintJobResult> future = this.executor.submit(job);
     this.runningTasksFutures.put(
         job.getEntry().getReferenceId(), new SubmittedPrintJob(future, job.getEntry()));
@@ -482,7 +494,6 @@ private boolean isTimeoutExceeded(final SubmittedPrintJob printJob) {
    * If the status of a print job is not checked for a while, we assume that the user is no longer
    * interested in the report, and we cancel the job.
    *
-   * @param printJob
    * @return is the abandoned timeout exceeded?
    */
   private boolean isAbandoned(final SubmittedPrintJob printJob) {