diff --git a/src/main/java/org/codelibs/fess/app/web/admin/badword/AdminBadwordAction.java b/src/main/java/org/codelibs/fess/app/web/admin/badword/AdminBadwordAction.java
index 36e4692b3..ab2644a10 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/badword/AdminBadwordAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/badword/AdminBadwordAction.java
@@ -24,11 +24,11 @@ import java.io.Reader;
 import java.io.Writer;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.concurrent.ForkJoinPool;
 
 import javax.annotation.Resource;
 
 import org.codelibs.core.beans.util.BeanUtil;
+import org.codelibs.core.concurrent.CommonPoolUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.app.pager.BadWordPager;
 import org.codelibs.fess.app.service.BadWordService;
@@ -286,7 +286,7 @@ public class AdminBadwordAction extends FessAdminAction {
     public HtmlResponse upload(final UploadForm form) {
         validate(form, messages -> {}, () -> asUploadHtml());
         verifyToken(() -> asUploadHtml());
-        ForkJoinPool.commonPool().execute(() -> {
+        CommonPoolUtil.execute(() -> {
             try (Reader reader = new BufferedReader(new InputStreamReader(form.badWordFile.getInputStream(), getCsvEncoding()))) {
                 badWordService.importCsv(reader);
                 suggestHelper.storeAllBadWords(false);
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/elevateword/AdminElevatewordAction.java b/src/main/java/org/codelibs/fess/app/web/admin/elevateword/AdminElevatewordAction.java
index ee2378913..8015166d6 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/elevateword/AdminElevatewordAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/elevateword/AdminElevatewordAction.java
@@ -27,13 +27,13 @@ import java.io.Reader;
 import java.io.Writer;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.concurrent.ForkJoinPool;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 import javax.annotation.Resource;
 
 import org.codelibs.core.beans.util.BeanUtil;
+import org.codelibs.core.concurrent.CommonPoolUtil;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.app.pager.ElevateWordPager;
@@ -320,7 +320,7 @@ public class AdminElevatewordAction extends FessAdminAction {
     public HtmlResponse upload(final UploadForm form) {
         validate(form, messages -> {}, () -> asUploadHtml());
         verifyToken(() -> asUploadHtml());
-        ForkJoinPool.commonPool().execute(() -> {
+        CommonPoolUtil.execute(() -> {
             try (Reader reader = new BufferedReader(new InputStreamReader(form.elevateWordFile.getInputStream(), getCsvEncoding()))) {
                 elevateWordService.importCsv(reader);
                 suggestHelper.deleteAllElevateWord(false);
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/badword/ApiAdminBadwordAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/badword/ApiAdminBadwordAction.java
index fe7bf1031..44bc7c7b1 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/admin/badword/ApiAdminBadwordAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/badword/ApiAdminBadwordAction.java
@@ -27,11 +27,11 @@ import java.io.Writer;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
-import java.util.concurrent.ForkJoinPool;
 import java.util.stream.Collectors;
 
 import javax.annotation.Resource;
 
+import org.codelibs.core.concurrent.CommonPoolUtil;
 import org.codelibs.fess.app.pager.BadWordPager;
 import org.codelibs.fess.app.service.BadWordService;
 import org.codelibs.fess.app.web.CrudMode;
@@ -146,7 +146,7 @@ public class ApiAdminBadwordAction extends FessApiAdminAction {
     @Execute
     public JsonResponse<ApiResult> post$upload(final UploadForm body) {
         validateApi(body, messages -> {});
-        ForkJoinPool.commonPool().execute(() -> {
+        CommonPoolUtil.execute(() -> {
             try (Reader reader = new BufferedReader(new InputStreamReader(body.badWordFile.getInputStream(), getCsvEncoding()))) {
                 badWordService.importCsv(reader);
                 suggestHelper.storeAllBadWords(false);
diff --git a/src/main/java/org/codelibs/fess/app/web/api/admin/elevateword/ApiAdminElevatewordAction.java b/src/main/java/org/codelibs/fess/app/web/api/admin/elevateword/ApiAdminElevatewordAction.java
index 9d12f40c9..cc300c6fb 100644
--- a/src/main/java/org/codelibs/fess/app/web/api/admin/elevateword/ApiAdminElevatewordAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/api/admin/elevateword/ApiAdminElevatewordAction.java
@@ -28,11 +28,11 @@ import java.io.Writer;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
-import java.util.concurrent.ForkJoinPool;
 import java.util.stream.Collectors;
 
 import javax.annotation.Resource;
 
+import org.codelibs.core.concurrent.CommonPoolUtil;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.app.pager.ElevateWordPager;
@@ -158,7 +158,7 @@ public class ApiAdminElevatewordAction extends FessApiAdminAction {
     @Execute
     public JsonResponse<ApiResult> post$upload(final UploadForm body) {
         validateApi(body, messages -> {});
-        ForkJoinPool.commonPool().execute(() -> {
+        CommonPoolUtil.execute(() -> {
             try (Reader reader = new BufferedReader(new InputStreamReader(body.elevateWordFile.getInputStream(), getCsvEncoding()))) {
                 elevateWordService.importCsv(reader);
                 suggestHelper.storeAllElevateWords(false);
diff --git a/src/main/java/org/codelibs/fess/helper/KeyMatchHelper.java b/src/main/java/org/codelibs/fess/helper/KeyMatchHelper.java
index 759b01077..23ccd56e8 100644
--- a/src/main/java/org/codelibs/fess/helper/KeyMatchHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/KeyMatchHelper.java
@@ -20,10 +20,10 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
-import java.util.concurrent.ForkJoinPool;
 
 import javax.annotation.PostConstruct;
 
+import org.codelibs.core.concurrent.CommonPoolUtil;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.core.misc.Pair;
 import org.codelibs.fess.Constants;
@@ -57,7 +57,7 @@ public class KeyMatchHelper {
     }
 
     public void update() {
-        ForkJoinPool.commonPool().execute(() -> reload(reloadInterval));
+        CommonPoolUtil.execute(() -> reload(reloadInterval));
     }
 
     public List<KeyMatch> getAvailableKeyMatchList() {
@@ -73,13 +73,22 @@ public class KeyMatchHelper {
         getAvailableKeyMatchList().stream().forEach(
                 keyMatch -> {
                     final BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
+                    if (logger.isDebugEnabled()) {
+                        logger.debug("Loading KeyMatch Query: " + keyMatch.getQuery() + ", Size: " + keyMatch.getMaxSize());
+                    }
                     getDocumentList(keyMatch).stream().map(doc -> {
+                        if (logger.isDebugEnabled()) {
+                            logger.debug("Loaded KeyMatch doc: " + doc);
+                        }
                         return DocumentUtil.getValue(doc, fessConfig.getIndexFieldDocId(), String.class);
                     }).forEach(docId -> {
                         boolQuery.should(QueryBuilders.termQuery(fessConfig.getIndexFieldDocId(), docId));
                     });
 
                     if (boolQuery.hasClauses()) {
+                        if (logger.isDebugEnabled()) {
+                            logger.debug("Loaded KeyMatch Boost Query: " + boolQuery);
+                        }
                         String virtualHost = keyMatch.getVirtualHost();
                         if (StringUtil.isBlank(virtualHost)) {
                             virtualHost = StringUtil.EMPTY;
@@ -91,6 +100,8 @@ public class KeyMatchHelper {
                         }
                         queryMap.put(toLowerCase(keyMatch.getTerm()),
                                 new Pair<>(boolQuery, ScoreFunctionBuilders.weightFactorFunction(keyMatch.getBoost())));
+                    } else if (logger.isDebugEnabled()) {
+                        logger.debug("No KeyMatch boost docs");
                     }
 
                     if (interval > 0) {
diff --git a/src/main/java/org/codelibs/fess/helper/SearchLogHelper.java b/src/main/java/org/codelibs/fess/helper/SearchLogHelper.java
index d69def6a9..aa3535ea0 100644
--- a/src/main/java/org/codelibs/fess/helper/SearchLogHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/SearchLogHelper.java
@@ -26,13 +26,13 @@ import java.util.Map;
 import java.util.Queue;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ForkJoinPool;
 import java.util.concurrent.TimeUnit;
 
 import javax.annotation.PostConstruct;
 import javax.servlet.http.HttpServletRequest;
 
 import org.apache.commons.lang3.StringUtils;
+import org.codelibs.core.concurrent.CommonPoolUtil;
 import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.app.service.SearchService;
@@ -216,7 +216,7 @@ public class SearchLogHelper {
             e.setUpdatedAt(now);
             return e;
         });
-        ForkJoinPool.commonPool().execute(() -> userInfoBhv.insertOrUpdate(userInfo));
+        CommonPoolUtil.execute(() -> userInfoBhv.insertOrUpdate(userInfo));
         return userInfo;
     }