Ignored Exceptions: use ‘ignored’ to supress IntellijIDEA warnings as suggested by @daniel-beck

core/src/main/java/hudson/ClassicPluginStrategy.java

@@ -778,19 +778,20 @@ public class ClassicPluginStrategy implements PluginStrategy {
                         Class<?> c = ClassLoaderReflectionToolkit._findLoadedClass(pw.classLoader, name);
                         if (c!=null)    return c;
                         return ClassLoaderReflectionToolkit._findClass(pw.classLoader, name);
-                    } catch (ClassNotFoundException e) {
+                    } catch (ClassNotFoundException ignored) {
                         //not found. try next
                     }
                 }
             } else {
                 for (Dependency dep : dependencies) {
                     PluginWrapper p = pluginManager.getPlugin(dep.shortName);
-                    if(p!=null)
+                    if(p!=null) {
                         try {
                             return p.classLoader.loadClass(name);
-                        } catch (ClassNotFoundException ex) {
-                            // try next
+                        } catch (ClassNotFoundException ignored) {
+                            // OK, try next
                         }
+                    }
                 }
             }
 

core/src/main/java/hudson/FilePath.java

@@ -2309,7 +2309,7 @@ public final class FilePath implements Serializable {
             // legacy agent.jar. Handle this gracefully
             try {
                 LOGGER.log(Level.WARNING,"Looks like an old agent.jar. Please update "+ Which.jarFile(Channel.class)+" to the new version",e);
-            } catch (IOException ex) {
+            } catch (IOException ignored) {
                 // really ignore this time
             }
         }
@@ -2427,8 +2427,8 @@ public final class FilePath implements Serializable {
                     // report both errors
                     e.addSuppressed(x);
                     throw e;
-                } catch (TimeoutException ex) {
-                    // remote is hanging
+                } catch (TimeoutException ignored) {
+                    // remote is hanging, just throw the original exception
                     throw e;
                 }
             }

core/src/main/java/hudson/model/queue/Executables.java

@@ -46,7 +46,7 @@ public class Executables {
             throws Error, RuntimeException {
         try {
             return e.getParent();
-        } catch (AbstractMethodError ex) {
+        } catch (AbstractMethodError ignored) { // will fallback to a private implementation
             try {
                 Method m = e.getClass().getMethod("getParent");
                 m.setAccessible(true);

core/src/main/java/hudson/os/solaris/ZFSInstaller.java

@@ -219,7 +219,7 @@ public class ZFSInstaller extends AdministrativeMonitor implements Serializable
                     // revert the file system creation
                     try {
                         hudson.destory();
-                    } catch (Exception ex) {
+                    } catch (Exception ignored) {
                         // but ignore the error and let the original error thrown
                     }
                     throw e;

core/src/main/java/jenkins/model/Jenkins.java

@@ -5030,7 +5030,7 @@ public class Jenkins extends AbstractCIBase implements DirectlyModifiableTopLeve
                 if (idx > 0) {
                     return new VersionNumber(versionString.substring(0,idx));
                 }
-            } catch (NumberFormatException ex) {
+            } catch (NumberFormatException ignored) {
                 // fall through
             }
 

core/src/main/java/jenkins/slaves/restarter/JnlpSlaveRestarterInstaller.java

@@ -77,7 +77,7 @@ public class JnlpSlaveRestarterInstaller extends ComputerListener implements Ser
 
             try {
                 Engine.class.getMethod("addListener", EngineListener.class);
-            } catch (NoSuchMethodException ex) {
+            } catch (NoSuchMethodException ignored) {
                 return null;    // running with older version of remoting that doesn't support adding listener
             }