diff --git a/pom.xml b/pom.xml
index e908c510cf03..85295a3d0830 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
         <groupId>org.apache</groupId>
         <artifactId>apache</artifactId>
         <version>23</version>
-        <relativePath />
+        <relativePath/>
     </parent>
     <groupId>org.apache.nifi</groupId>
     <artifactId>nifi</artifactId>
@@ -84,7 +84,7 @@
     <properties>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
-        <maven.surefire.arguments />
+        <maven.surefire.arguments/>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <inceptionYear>2014</inceptionYear>
@@ -214,7 +214,7 @@
             <dependency>
                 <groupId>ch.qos.logback</groupId>
                 <artifactId>logback-classic</artifactId>
-                <version>1.2.3</version>
+                <version>1.5.13</version>
                 <scope>provided</scope>
             </dependency>
             <dependency>
@@ -672,73 +672,73 @@
                 <configuration>
                     <checkstyleRules>
                         <module name="Checker">
-                            <property name="charset" value="UTF-8" />
-                            <property name="severity" value="warning" />
+                            <property name="charset" value="UTF-8"/>
+                            <property name="severity" value="warning"/>
                             <!-- Checks for whitespace -->
                             <!-- See http://checkstyle.sf.net/config_whitespace.html -->
                             <module name="FileTabCharacter">
-                                <property name="eachLine" value="true" />
+                                <property name="eachLine" value="true"/>
                             </module>
                             <module name="LineLength">
                                 <!-- needs extra, because Eclipse formatter
                                     ignores the ending left brace -->
-                                <property name="max" value="200" />
-                                <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://" />
+                                <property name="max" value="200"/>
+                                <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
                             </module>
                             <module name="TreeWalker">
                                 <module name="RegexpSinglelineJava">
-                                    <property name="format" value="\s+$" />
-                                    <property name="message" value="Line has trailing whitespace." />
+                                    <property name="format" value="\s+$"/>
+                                    <property name="message" value="Line has trailing whitespace."/>
                                 </module>
                                 <module name="RegexpSinglelineJava">
-                                    <property name="format" value="[@]see\s+[{][@]link" />
-                                    <property name="message" value="Javadoc @see does not need @link: pick one or the other." />
+                                    <property name="format" value="[@]see\s+[{][@]link"/>
+                                    <property name="message" value="Javadoc @see does not need @link: pick one or the other."/>
                                 </module>
-                                <module name="OuterTypeFilename" />
-                                <module name="AvoidStarImport" />
+                                <module name="OuterTypeFilename"/>
+                                <module name="AvoidStarImport"/>
                                 <module name="UnusedImports">
-                                    <property name="processJavadoc" value="true" />
+                                    <property name="processJavadoc" value="true"/>
                                 </module>
-                                <module name="NoLineWrap" />
-                                <module name="LeftCurly" />
-                                <module name="RightCurly" />
+                                <module name="NoLineWrap"/>
+                                <module name="LeftCurly"/>
+                                <module name="RightCurly"/>
                                 <module name="RightCurly">
-                                    <property name="option" value="alone_or_singleline" />
-                                    <property name="tokens" value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT" />
+                                    <property name="option" value="alone_or_singleline"/>
+                                    <property name="tokens" value="CLASS_DEF, METHOD_DEF, CTOR_DEF, LITERAL_FOR, LITERAL_WHILE, STATIC_INIT"/>
                                 </module>
                                 <module name="SeparatorWrap">
-                                    <property name="tokens" value="DOT" />
-                                    <property name="option" value="nl" />
+                                    <property name="tokens" value="DOT"/>
+                                    <property name="option" value="nl"/>
                                 </module>
                                 <module name="SeparatorWrap">
-                                    <property name="tokens" value="COMMA" />
-                                    <property name="option" value="EOL" />
+                                    <property name="tokens" value="COMMA"/>
+                                    <property name="option" value="EOL"/>
                                 </module>
                                 <module name="PackageName">
-                                    <property name="format" value="^[a-z]+(\.[a-z][a-zA-Z0-9]*)*$" />
+                                    <property name="format" value="^[a-z]+(\.[a-z][a-zA-Z0-9]*)*$"/>
                                 </module>
                                 <module name="MethodTypeParameterName">
-                                    <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)" />
+                                    <property name="format" value="(^[A-Z][0-9]?)$|([A-Z][a-zA-Z0-9]*[T]$)"/>
                                 </module>
-                                <module name="MethodParamPad" />
+                                <module name="MethodParamPad"/>
                                 <module name="OperatorWrap">
-                                    <property name="option" value="NL" />
-                                    <property name="tokens" value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR, LT, MINUS, MOD, NOT_EQUAL, QUESTION, SL, SR, STAR " />
+                                    <property name="option" value="NL"/>
+                                    <property name="tokens" value="BAND, BOR, BSR, BXOR, DIV, EQUAL, GE, GT, LAND, LE, LITERAL_INSTANCEOF, LOR, LT, MINUS, MOD, NOT_EQUAL, QUESTION, SL, SR, STAR "/>
                                 </module>
                                 <module name="AnnotationLocation">
-                                    <property name="tokens" value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF" />
+                                    <property name="tokens" value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, METHOD_DEF, CTOR_DEF"/>
                                 </module>
                                 <module name="AnnotationLocation">
-                                    <property name="tokens" value="VARIABLE_DEF" />
-                                    <property name="allowSamelineMultipleAnnotations" value="true" />
+                                    <property name="tokens" value="VARIABLE_DEF"/>
+                                    <property name="allowSamelineMultipleAnnotations" value="true"/>
                                 </module>
-                                <module name="NonEmptyAtclauseDescription" />
+                                <module name="NonEmptyAtclauseDescription"/>
                                 <module name="JavadocMethod">
-                                    <property name="allowMissingParamTags" value="true" />
-                                    <property name="allowMissingReturnTag" value="true" />
-                                    <property name="allowedAnnotations" value="Override,Test,BeforeClass,AfterClass,Before,After" />
+                                    <property name="allowMissingParamTags" value="true"/>
+                                    <property name="allowMissingReturnTag" value="true"/>
+                                    <property name="allowedAnnotations" value="Override,Test,BeforeClass,AfterClass,Before,After"/>
                                 </module>
-                                <module name="SingleLineJavadoc" />
+                                <module name="SingleLineJavadoc"/>
                             </module>
                         </module>
                     </checkstyleRules>