diff --git a/src/main/java/org/codelibs/fess/Constants.java b/src/main/java/org/codelibs/fess/Constants.java
index ebf45157c..7d3f6cdbc 100644
--- a/src/main/java/org/codelibs/fess/Constants.java
+++ b/src/main/java/org/codelibs/fess/Constants.java
@@ -324,4 +324,6 @@ public class Constants extends CoreLibConstants {
     public static final String PROCESS_TYPE_BOTH = "B";
 
     public static final long ONE_DAY_IN_MILLIS = 24L * 60L * 60L * 1000L;
+
+    public static final String GUEST_USER = "guest";
 }
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/failureurl/AdminFailureurlAction.java b/src/main/java/org/codelibs/fess/app/web/admin/failureurl/AdminFailureurlAction.java
index 7ad9c6897..389c1d5b9 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/failureurl/AdminFailureurlAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/failureurl/AdminFailureurlAction.java
@@ -21,7 +21,6 @@ import java.util.Map;
 
 import javax.annotation.Resource;
 
-import org.codelibs.fess.annotation.Token;
 import org.codelibs.fess.app.pager.FailureUrlPager;
 import org.codelibs.fess.app.service.FailureUrlService;
 import org.codelibs.fess.app.web.base.FessAdminAction;
@@ -32,7 +31,6 @@ import org.lastaflute.web.Execute;
 import org.lastaflute.web.callback.ActionRuntime;
 import org.lastaflute.web.response.HtmlResponse;
 import org.lastaflute.web.response.render.RenderData;
-import org.lastaflute.web.validation.VaErrorHook;
 
 /**
  * @author codelibs
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/failureurl/FailureUrlEditForm.java b/src/main/java/org/codelibs/fess/app/web/admin/failureurl/FailureUrlEditForm.java
index b75e65a8e..df15e7f18 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/failureurl/FailureUrlEditForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/failureurl/FailureUrlEditForm.java
@@ -20,8 +20,6 @@ import java.io.Serializable;
 import java.util.HashMap;
 import java.util.Map;
 
-import org.codelibs.fess.util.ComponentUtil;
-
 /**
  * @author codelibs
  * @author Keiichi Watanabe
diff --git a/src/main/java/org/codelibs/fess/crud/CommonConstants.java b/src/main/java/org/codelibs/fess/crud/CommonConstants.java
index 7fa971df3..3701f3b75 100644
--- a/src/main/java/org/codelibs/fess/crud/CommonConstants.java
+++ b/src/main/java/org/codelibs/fess/crud/CommonConstants.java
@@ -36,8 +36,9 @@ public class CommonConstants {
     public static final String[] PAGER_CONVERSION_RULE = { "allRecordCount", "pageSize", "currentPageNumber", "allPageCount",
             "existPrePage", "existNextPage" };
 
-    public static final String[] COMMON_CONVERSION_RULE = new String[] { "searchParams", "mode", "createdBy", "createdTime", "updatedBy",
-            "updatedTime" };
+    // TODO remove searchParams
+    public static final String[] COMMON_CONVERSION_RULE = new String[] { "searchParams", "crudMode", "createdBy", "createdTime",
+            "updatedBy", "updatedTime" };
 
     protected CommonConstants() {
         // nothing