diff --git a/src/main/java/org/redkale/convert/Writer.java b/src/main/java/org/redkale/convert/Writer.java
index 3e5535fee..813c4eda2 100644
--- a/src/main/java/org/redkale/convert/Writer.java
+++ b/src/main/java/org/redkale/convert/Writer.java
@@ -84,11 +84,11 @@ public abstract class Writer {
         return this;
     }
 
-    protected final boolean tiny() {
+    public final boolean tiny() {
         return features > 0 && ConvertFactory.checkTinyFeature(features);
     }
 
-    protected final boolean nullable() {
+    public final boolean nullable() {
         return features > 0 && ConvertFactory.checkNullableFeature(features);
     }
 
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufBytesWriter.java b/src/main/java/org/redkale/convert/pb/ProtobufBytesWriter.java
index 27ebded94..5c4747d29 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufBytesWriter.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufBytesWriter.java
@@ -53,14 +53,14 @@ public class ProtobufBytesWriter extends ProtobufWriter { // 存在child情况
     @Override
     protected boolean recycle() {
         super.recycle();
-        if (this.delegate != null && this.pool != null) {
+        if (this.delegate != null && this.pool != null && this.parent == null) {
             ProtobufWriter s;
             ProtobufWriter p = this.delegate;
             do {
                 s = p;
                 p = p.parent;
                 offerPool(s);
-            } while (p != this);
+            } while (p != this && p != null);
         }
         this.delegate = null;
         if (this.content.length > RESET_MAX_SIZE) {
@@ -92,6 +92,11 @@ public class ProtobufBytesWriter extends ProtobufWriter { // 存在child情况
             this.child = result;
             delegate = result;
         } else {
+            if (delegate.child != null) {
+                while (delegate.child != null) {
+                    delegate = delegate.child;
+                }
+            }
             result.parent = delegate;
             delegate.child = result;
             delegate = result;
diff --git a/src/test/java/org/redkale/test/convert/pb/UserTest.java b/src/test/java/org/redkale/test/convert/pb/UserTest.java
index 589b2d5ac..d5838c3c9 100644
--- a/src/test/java/org/redkale/test/convert/pb/UserTest.java
+++ b/src/test/java/org/redkale/test/convert/pb/UserTest.java
@@ -9,10 +9,8 @@ import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 import org.redkale.convert.ConvertColumn;
 import org.redkale.convert.json.JsonConvert;
-import org.redkale.convert.pb.ProtobufArrayEncoder;
 import org.redkale.convert.pb.ProtobufConvert;
 import org.redkale.convert.pb.ProtobufFactory;
-import org.redkale.convert.pb.ProtobufObjectEncoder;
 import org.redkale.test.convert.User;
 import org.redkale.util.AnyValue;
 import org.redkale.util.AnyValueWriter;
@@ -54,7 +52,7 @@ public class UserTest {
         Assertions.assertEquals(bean.toString(), bean2.toString());
     }
 
-    // @Test
+    @Test
     public void run3() throws Exception {
         ProtobufFactory factory = ProtobufFactory.root();
         AnyValueWriter writer = AnyValueWriter.create();
@@ -63,15 +61,13 @@ public class UserTest {
         writer.addValue("node", AnyValueWriter.create("id", "111"));
         writer.addValue("node", AnyValueWriter.create("id", "222"));
         writer.addValue("node", AnyValueWriter.create("id", "333"));
-        System.out.println(writer);
-        ProtobufObjectEncoder encoder = (ProtobufObjectEncoder) factory.loadEncoder(AnyValueWriter.class);
-        System.out.println(encoder);
-        ProtobufArrayEncoder stringEntrys = (ProtobufArrayEncoder) encoder.getMembers()[2].getEncoder();
-        System.out.println(stringEntrys);
-        String excepted = "proto-buf 89.[0x12,0x0b,0x0a,0x04,0x6e,0x61,0x6d,0x65,0x12,0x03,0x61,0x61,0x61,0x12,0x0b,0x0a,0x04,0x6e,0x61,0x6d,0x65,0x12,0x03,0x62,0x62,0x62,0x1a,0x13,0x0a,0x04,0x6e,0x6f,0x64,0x65,0x12,0x0b,0x12,0x09,0x0a,0x02,0x69,0x64,0x12,0x03,0x31,0x31,0x31,0x1a,0x13,0x0a,0x04,0x6e,0x6f,0x64,0x65,0x12,0x0b,0x12,0x09,0x0a,0x02,0x69,0x64,0x12,0x03,0x32,0x32,0x32,0x1a,0x13,0x0a,0x04,0x6e,0x6f,0x64,0x65,0x12,0x0b,0x12,0x09,0x0a,0x02,0x69,0x64,0x12,0x03,0x33,0x33,0x33]";
+        String excepted =
+                "proto-buf 89.[0x12,0x0b,0x0a,0x04,0x6e,0x61,0x6d,0x65,0x12,0x03,0x61,0x61,0x61,0x12,0x0b,0x0a,0x04,0x6e,0x61,0x6d,0x65,0x12,0x03,0x62,0x62,0x62,0x1a,0x13,0x0a,0x04,0x6e,0x6f,0x64,0x65,0x12,0x0b,0x12,0x09,0x0a,0x02,0x69,0x64,0x12,0x03,0x31,0x31,0x31,0x1a,0x13,0x0a,0x04,0x6e,0x6f,0x64,0x65,0x12,0x0b,0x12,0x09,0x0a,0x02,0x69,0x64,0x12,0x03,0x32,0x32,0x32,0x1a,0x13,0x0a,0x04,0x6e,0x6f,0x64,0x65,0x12,0x0b,0x12,0x09,0x0a,0x02,0x69,0x64,0x12,0x03,0x33,0x33,0x33]";
         byte[] bs = factory.getConvert().convertTo(AnyValue.class, writer);
         System.out.println(excepted);
-        Utility.println("pbconvert ", bs);
+        String rs = Utility.println("pbconvert ", bs);
+        Assertions.assertEquals(excepted.substring(excepted.indexOf('[')), rs.substring(rs.indexOf('[')));
+
         AnyValue other = factory.getConvert().convertFrom(AnyValue.class, bs);
         System.out.println(other);
         Assertions.assertEquals(writer.toString(), other.toString());