diff --git a/fizz-common/src/main/java/we/util/ThreadContext.java b/fizz-common/src/main/java/we/util/ThreadContext.java
index def8156..79ddc7a 100644
--- a/fizz-common/src/main/java/we/util/ThreadContext.java
+++ b/fizz-common/src/main/java/we/util/ThreadContext.java
@@ -35,10 +35,14 @@ public abstract class ThreadContext {
 
 	private static final String  sb          = "$sb";
 
+	public  static final String  sb0         = "$sb0";
+
 	private static final int     sbCap       = 256;
 
 	private static final String  arrayListT  = "arlstT";
 
+	public  static final String  arrayList0  = "arlst0T";
+
 	private static final String  hashMapT    = "hsMapT";
 
 	private static final String  hashSetT    = "hsSetT";
diff --git a/fizz-core/src/main/java/we/plugin/auth/ServiceConfig.java b/fizz-core/src/main/java/we/plugin/auth/ServiceConfig.java
index 3d3e227..e4eb4f5 100644
--- a/fizz-core/src/main/java/we/plugin/auth/ServiceConfig.java
+++ b/fizz-core/src/main/java/we/plugin/auth/ServiceConfig.java
@@ -36,7 +36,7 @@ public class ServiceConfig {
 
 //  private static final String gmpT  = "gmpT";
 
-    private static final String gsmpT = "gsmpT";
+//  private static final String gsmpT = "gsmpT";
 
     private String id;
 
@@ -108,7 +108,7 @@ public class ServiceConfig {
 
     @JsonIgnore
     public List<ApiConfig> getApiConfigs(Set<String> gatewayGroups, HttpMethod method, String path) {
-        ArrayList<ApiConfig> result = ThreadContext.getArrayList(gsmpT);
+        ArrayList<ApiConfig> result = ThreadContext.getArrayList(ThreadContext.arrayList0);
         for (String gatewayGroup : gatewayGroups) {
             List<ApiConfig> apiConfigs = getApiConfigs(gatewayGroup, method, path);
             result.addAll(apiConfigs);
diff --git a/fizz-core/src/main/java/we/util/WebUtils.java b/fizz-core/src/main/java/we/util/WebUtils.java
index 4c101d8..e8e9450 100644
--- a/fizz-core/src/main/java/we/util/WebUtils.java
+++ b/fizz-core/src/main/java/we/util/WebUtils.java
@@ -623,7 +623,7 @@ public abstract class WebUtils {
 
     public static String jsonRespBody(int code, @Nullable String msg, @Nullable String traceId, @Nullable Object context) {
 //      StringBuilder b = ThreadContext.getStringBuilder(respbT);
-        StringBuilder b = ThreadContext.getStringBuilder();
+        StringBuilder b = ThreadContext.getStringBuilder(ThreadContext.sb0);
         b.append(s0).append(SystemConfig.FIZZ_ERR_RESP_CODE_FIELD).append(s1).append(code);
         if (StringUtils.isNotBlank(msg)) {
             b.append(s2).append(SystemConfig.FIZZ_ERR_RESP_MSG_FIELD).append(s3).append(msg).append(s4);
@@ -639,7 +639,7 @@ public abstract class WebUtils {
     }
 
     public static String toQueryString(MultiValueMap<String, String> queryParams) {
-        StringBuilder b = ThreadContext.getStringBuilder();
+        StringBuilder b = ThreadContext.getStringBuilder(ThreadContext.sb0);
         Set<Map.Entry<String, List<String>>> params = queryParams.entrySet();
         int ps = params.size(), cnt = 0;
         try {