diff --git a/coding/sensorML-v101/src/main/java/org/n52/sos/encode/GmlEncoderv311.java b/coding/sensorML-v101/src/main/java/org/n52/sos/encode/GmlEncoderv311.java
index 01242657cd..be5ddd5a06 100644
--- a/coding/sensorML-v101/src/main/java/org/n52/sos/encode/GmlEncoderv311.java
+++ b/coding/sensorML-v101/src/main/java/org/n52/sos/encode/GmlEncoderv311.java
@@ -159,8 +159,10 @@ public XmlObject encode(Object element, Map<HelperValues, String> additionalValu
         } else {
             throw new UnsupportedEncoderInputException(this, element);
         }
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
     }
 
diff --git a/coding/sensorML-v101/src/main/java/org/n52/sos/encode/SensorMLEncoderv101.java b/coding/sensorML-v101/src/main/java/org/n52/sos/encode/SensorMLEncoderv101.java
index 200035086c..77c954c970 100644
--- a/coding/sensorML-v101/src/main/java/org/n52/sos/encode/SensorMLEncoderv101.java
+++ b/coding/sensorML-v101/src/main/java/org/n52/sos/encode/SensorMLEncoderv101.java
@@ -243,8 +243,10 @@ else if (response instanceof SosProcedureDescriptionUnknowType) {
         }
         // check if all gml:id are unique
         XmlHelper.makeGmlIdsUnique(encodedObject.getDomNode());
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
 
     }
diff --git a/coding/sensorML-v101/src/main/java/org/n52/sos/encode/SweCommonEncoderv101.java b/coding/sensorML-v101/src/main/java/org/n52/sos/encode/SweCommonEncoderv101.java
index 00ad63684e..eff83cc204 100644
--- a/coding/sensorML-v101/src/main/java/org/n52/sos/encode/SweCommonEncoderv101.java
+++ b/coding/sensorML-v101/src/main/java/org/n52/sos/encode/SweCommonEncoderv101.java
@@ -191,8 +191,10 @@ public XmlObject encode(final Object element, final Map<HelperValues, String> ad
         } else {
             throw new UnsupportedEncoderInputException(this, element);
         }
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
     }
     
diff --git a/coding/sensorML-v20/src/main/java/org/n52/sos/encode/Iso19139GcoEncoder.java b/coding/sensorML-v20/src/main/java/org/n52/sos/encode/Iso19139GcoEncoder.java
index fff3e5cf85..a4ea666083 100644
--- a/coding/sensorML-v20/src/main/java/org/n52/sos/encode/Iso19139GcoEncoder.java
+++ b/coding/sensorML-v20/src/main/java/org/n52/sos/encode/Iso19139GcoEncoder.java
@@ -102,8 +102,10 @@ public XmlObject encode(Object element, Map<HelperValues, String> additionalValu
         } else {
             throw new UnsupportedEncoderInputException(this, element);
         }
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
     }
 
diff --git a/coding/sensorML-v20/src/main/java/org/n52/sos/encode/SensorMLEncoderv20.java b/coding/sensorML-v20/src/main/java/org/n52/sos/encode/SensorMLEncoderv20.java
index 6a93f5c073..4cb4adcbb8 100644
--- a/coding/sensorML-v20/src/main/java/org/n52/sos/encode/SensorMLEncoderv20.java
+++ b/coding/sensorML-v20/src/main/java/org/n52/sos/encode/SensorMLEncoderv20.java
@@ -253,8 +253,10 @@ public XmlObject encode(Object objectToEncode, Map<HelperValues, String> additio
         }
         // check if all gml:id are unique
         XmlHelper.makeGmlIdsUnique(encodedObject.getDomNode());
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
     }
 
diff --git a/coding/sos-v100/src/main/java/org/n52/sos/encode/OmEncoderv100.java b/coding/sos-v100/src/main/java/org/n52/sos/encode/OmEncoderv100.java
index d6f7ef7fba..ab4bdd8fad 100644
--- a/coding/sos-v100/src/main/java/org/n52/sos/encode/OmEncoderv100.java
+++ b/coding/sos-v100/src/main/java/org/n52/sos/encode/OmEncoderv100.java
@@ -232,8 +232,10 @@ public XmlObject encode(Object element, Map<HelperValues, String> additionalValu
         } else {
             throw new UnsupportedEncoderInputException(this, element);
         }
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
     }
 
diff --git a/coding/sos-v100/src/main/java/org/n52/sos/encode/SamplingEncoderv100.java b/coding/sos-v100/src/main/java/org/n52/sos/encode/SamplingEncoderv100.java
index 0b26452c69..09c781f32e 100644
--- a/coding/sos-v100/src/main/java/org/n52/sos/encode/SamplingEncoderv100.java
+++ b/coding/sos-v100/src/main/java/org/n52/sos/encode/SamplingEncoderv100.java
@@ -135,8 +135,10 @@ public Set<SchemaLocation> getSchemaLocations() {
     public XmlObject encode(AbstractFeature abstractFeature, Map<HelperValues, String> additionalValues)
             throws OwsExceptionReport {
         XmlObject encodedObject = createFeature(abstractFeature);
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
     }
 
diff --git a/coding/sos-v20/src/main/java/org/n52/sos/encode/SosRequestEncoderv20.java b/coding/sos-v20/src/main/java/org/n52/sos/encode/SosRequestEncoderv20.java
index 1cc5ee7994..1e23d21ea9 100644
--- a/coding/sos-v20/src/main/java/org/n52/sos/encode/SosRequestEncoderv20.java
+++ b/coding/sos-v20/src/main/java/org/n52/sos/encode/SosRequestEncoderv20.java
@@ -103,8 +103,10 @@ public XmlObject encode(final AbstractServiceRequest<?> communicationObject) thr
     public XmlObject encode(final AbstractServiceRequest<?> request, final Map<HelperValues, String> additionalValues)
             throws OwsExceptionReport {
         XmlObject encodedObject = encodeRequests(request);
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
     }
 
diff --git a/coding/sos-v20/src/main/java/org/n52/sos/encode/SweCommonEncoderv20.java b/coding/sos-v20/src/main/java/org/n52/sos/encode/SweCommonEncoderv20.java
index 8ea2d24f42..2cc5f1735f 100644
--- a/coding/sos-v20/src/main/java/org/n52/sos/encode/SweCommonEncoderv20.java
+++ b/coding/sos-v20/src/main/java/org/n52/sos/encode/SweCommonEncoderv20.java
@@ -186,8 +186,10 @@ public XmlObject encode(final Object sosSweType, final Map<HelperValues, String>
         } else {
             throw new UnsupportedEncoderInputException(this, sosSweType);
         }
-        LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                XmlHelper.validateDocument(encodedObject));
+        if (LOGGER.isDebugEnabled()) {
+        	LOGGER.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+                    XmlHelper.validateDocument(encodedObject));
+        }
         return encodedObject;
     }
 
diff --git a/extensions/gda/operation/src/main/java/org/n52/sos/gda/GetDataAvailabilityXmlEncoder.java b/extensions/gda/operation/src/main/java/org/n52/sos/gda/GetDataAvailabilityXmlEncoder.java
index 11303f9089..19f6956d3e 100644
--- a/extensions/gda/operation/src/main/java/org/n52/sos/gda/GetDataAvailabilityXmlEncoder.java
+++ b/extensions/gda/operation/src/main/java/org/n52/sos/gda/GetDataAvailabilityXmlEncoder.java
@@ -58,7 +58,6 @@
  */
 public class GetDataAvailabilityXmlEncoder extends AbstractResponseEncoder<GetDataAvailabilityResponse> {
 
-    @SuppressWarnings("unused")
     private static final Logger LOG = LoggerFactory.getLogger(GetDataAvailabilityXmlEncoder.class);
 
     public GetDataAvailabilityXmlEncoder() {
@@ -80,8 +79,10 @@ protected XmlObject create(GetDataAvailabilityResponse response) throws OwsExcep
             } else {
                 new GetDataAvailabilityStreamWriter(response.getVersion(), response.getDataAvailabilities()).write(out);
                 XmlObject encodedObject = XmlObject.Factory.parse(out.toString("UTF8"));
-                LOG.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
-                        XmlHelper.validateDocument(encodedObject));
+                if (LOG.isDebugEnabled()) {
+	                LOG.debug("Encoded object {} is valid: {}", encodedObject.schemaType().toString(),
+	                        XmlHelper.validateDocument(encodedObject));
+                }
                 return encodedObject;
             }
             return XmlObject.Factory.parse(out.toString("UTF8"));