diff --git a/bench/run.sh b/bench/run.sh
index f72e8f4..c21dbfa 100644
--- a/bench/run.sh
+++ b/bench/run.sh
@@ -48,7 +48,7 @@ echo -e "\nTesting.."
 $JMETER -n -t bench/test.jmx -Jhost=127.0.0.1 -Jt=60 -Jc=10 -Jport=8080 -Jout=out/$1.csv
 
 echo -e "\n launch http2 bench"
-h2load -v -c 10 -t 10 -m 10 -D 60 --warm-up-time=10 http://127.0.0.1:8080/test > out/$1.log
+h2load -c 10 -t 10 -m 10 -D 60 --warm-up-time=10 http://127.0.0.1:8080/test > out/$1.log
 
 ${1}_stop
 sleep 10
diff --git a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Headers.java b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Headers.java
index 8b19280..1a9e2d7 100644
--- a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Headers.java
+++ b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Headers.java
@@ -150,7 +150,7 @@ public static void writeInt(Buffers out, int p, int n, int v) throws Interrupted
 	 * @throws InterruptedException 
 	 */
 	public void writeHeader(Buffers out, String name, String value) throws InterruptedException {
-		int o = 0;
+		int o = -1;
 		for (int i = 0; i < TABLE.length; i++) {
 			Entry e = TABLE[i];
 			if (e.name.equals(name)) {
@@ -158,24 +158,24 @@ public void writeHeader(Buffers out, String name, String value) throws Interrupt
 					writeInt(out, 0b10000000, 7, i + 1);
 					return;
 				}
-				if (o == 0)
+				if (o == -1)
 					o = i;
 			}
 		}
 		int i = TABLE.length;
 		for (Entry e : dynamic) {
-			i++;
 			if (e.name.equals(name)) {
 				if (e.value.equals(value)) {
 					writeInt(out, 0b10000000, 7, i + 1);
 					return;
 				}
-				if (o == 0)
+				if (o == -1)
 					o = i;
 			}
+			i++;
 		}
 
-		writeInt(out, 0b01000000, 6, o < 0 ? 0 : o);
+		writeInt(out, 0b01000000, 6, o < 0 ? 0 : o + 1);
 		if (o < 0)
 			writeData(out, name);
 		writeData(out, value);
@@ -247,6 +247,8 @@ private static String readData(InputStream in) throws IOException {
 
 	private static void writeData(Buffers out, String value) throws InterruptedException {
 		byte[] bytes = value.getBytes(StandardCharsets.US_ASCII);
+		// TODO huffman
+
 		writeInt(out, 0, 7, bytes.length);
 		out.write(bytes);
 	}
diff --git a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Processor.java b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Processor.java
index b4f9ee0..d84e13c 100644
--- a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Processor.java
+++ b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Processor.java
@@ -154,7 +154,6 @@ private void readFrame(Buffers buf) throws InterruptedException {
 		int type = b[3];
 		int flags = b[4];
 		int id = (b[5] & 0x7f) << 24 | (b[6] & 0xff) << 16 | (b[7] & 0xff) << 8 | (b[8] & 0xff);
-		logger.debug("{} {} {} {}", size, type, flags, id);
 
 		if (wantContinuation && type != 9 || !wantContinuation && type == 9) {
 			goaway(PROTOCOL_ERROR);
@@ -168,6 +167,7 @@ private void readFrame(Buffers buf) throws InterruptedException {
 			return;
 		}
 
+		logger.debug("{}: read {}", this, b.getClass().getSimpleName());
 		r = b.build(this, size, flags, id, buf);
 	}
 
@@ -186,37 +186,37 @@ public void goaway(int err) throws InterruptedException {
 			co.pendingWrite.write(f);
 			co.flush();
 		}
+		logger.debug("{}: send GOAWAY {}", this, error(err));
 	}
 
-	@SuppressWarnings("resource")
 	public void sendHeaders(int id, ServletResponseImpl res) throws InterruptedException {
 		byte[] f = new byte[9];
 		Buffers out = new Buffers();
 		int type = 1;
-		synchronized (headers) {
-			headers.writeHeader(out, ":status", Integer.toString(res.getStatus()));
-			for (String n : res.getHeaderNames()) {
-				for (String v : res.getHeaders(n)) {
-					headers.writeHeader(out, n, v);
-
-					if (out.length() >= frame) {
-						formatFrame(f, out.length(), type, 0, id);
-						type = 9;
-						synchronized (co) {
-							co.pendingWrite.write(f);
-							out.read(co.pendingWrite, frame, false);
-							co.flush();
+		synchronized (co) {
+			synchronized (headers) {
+				headers.writeHeader(out, ":status", Integer.toString(res.getStatus()));
+				for (String n : res.getHeaderNames()) {
+					for (String v : res.getHeaders(n)) {
+						headers.writeHeader(out, n, v);
+
+						if (out.length() >= frame) {
+							formatFrame(f, out.length(), type, 0, id);
+							type = 9;
+							synchronized (co) {
+								co.pendingWrite.write(f);
+								out.read(co.pendingWrite, frame, false);
+								co.flush();
+							}
 						}
 					}
 				}
 			}
-		}
-		int flag = 0x4;
-		Http2ServletOutput sout = (Http2ServletOutput) res.getRawStream();
-		if (sout == null || sout.isDone())
-			flag |= 0x1;
-		formatFrame(f, out.length(), type, flag, id);
-		synchronized (co) {
+			int flag = 0x4;
+			Http2ServletOutput sout = (Http2ServletOutput) res.getRawStream();
+			if (sout == null || sout.isDone())
+				flag |= 0x1;
+			formatFrame(f, out.length(), type, flag, id);
 			co.pendingWrite.write(f);
 			out.read(co.pendingWrite, -1, false);
 			co.flush();
diff --git a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Stream.java b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Stream.java
index 7fff6d4..bfafae1 100644
--- a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Stream.java
+++ b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/Http2Stream.java
@@ -6,16 +6,12 @@
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Future;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import jakarta.servlet.ServletInputStream;
 import unknow.server.servlet.HttpWorker;
 import unknow.server.servlet.impl.AbstractServletOutput;
 import unknow.server.servlet.utils.PathUtils;
 
 public class Http2Stream extends HttpWorker implements Http2FlowControl {
-	private static final Logger logger = LoggerFactory.getLogger(Http2Stream.class);
 
 	private final int id;
 	private final Http2Processor p;
@@ -41,7 +37,6 @@ public Http2Stream(Http2Processor p, int id, int window) {
 	}
 
 	public final void addHeader(String name, String value) {
-		logger.debug("addHeader {}: {}", name, value);
 		if (name.charAt(0) != ':') {
 			req.addHeader(name, value);
 			return;
diff --git a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/frame/FrameGoAway.java b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/frame/FrameGoAway.java
index 88f41d1..1bdb766 100644
--- a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/frame/FrameGoAway.java
+++ b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/frame/FrameGoAway.java
@@ -37,7 +37,7 @@ public FrameReader process(Buffers buf) throws InterruptedException {
 		lastId = (b[0] & 0x7f) << 24 | (b[1] & 0xff) << 16 | (b[2] & 0xff) << 8 | (b[3] & 0xff);
 
 		buf.read(b, 0, 4, false);
-		int err = (b[0] & 0x7f) << 24 | (b[1] & 0xff) << 16 | (b[2] & 0xff) << 8 | (b[3] & 0xff);
+		int err = (b[0] & 0xff) << 24 | (b[1] & 0xff) << 16 | (b[2] & 0xff) << 8 | (b[3] & 0xff);
 		logger.info("goaway last: {} err: {}", lastId, Http2Processor.error(err));
 		size -= 8;
 		p.closing = true;
diff --git a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/frame/FrameSettings.java b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/frame/FrameSettings.java
index 0c57758..aaf34f6 100644
--- a/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/frame/FrameSettings.java
+++ b/unknow-server-servlet/src/main/java/unknow/server/servlet/http2/frame/FrameSettings.java
@@ -1,14 +1,19 @@
 package unknow.server.servlet.http2.frame;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import unknow.server.servlet.HttpConnection;
 import unknow.server.servlet.http2.Http2Processor;
 import unknow.server.util.io.Buffers;
 
 public class FrameSettings extends FrameReader {
+	private static final Logger logger = LoggerFactory.getLogger(FrameSettings.class);
 	public static final FrameBuilder BUILDER = (p, size, flags, id, buf) -> {
 		if ((flags & 0x1) == 1) {
 			if (size != 0)
 				p.goaway(Http2Processor.FRAME_SIZE_ERROR);
+			logger.trace("{}: settings ack", p);
 			return null;
 		}
 		if (id != 0) {
@@ -40,11 +45,13 @@ public final FrameReader process(Buffers buf) throws InterruptedException {
 
 			switch (i) {
 				case 1:
+					logger.trace("{}: SETTINGS_HEADER_TABLE_SIZE  {}", p, v);
 					synchronized (p.headers) {
 						p.headers.setMax(v);
 					}
 					break;
 				case 2:
+					logger.trace("{}: SETTINGS_ENABLE_PUSH {}", p, v);
 					if (v < 0 || v > 1) {
 						p.goaway(Http2Processor.PROTOCOL_ERROR);
 						return null;
@@ -52,12 +59,15 @@ public final FrameReader process(Buffers buf) throws InterruptedException {
 //						allowPush = v == 1;
 					break;
 				case 3:
+					logger.trace("{}: SETTINGS_MAX_CONCURRENT_STREAMS {}", p, v);
 //						concurrent = v;
 					break;
 				case 4:
+					logger.trace("{}: SETTINGS_INITIAL_WINDOW_SIZE {}", p, v);
 					p.initialWindow = v;
 					break;
 				case 5:
+					logger.trace("{}: SETTINGS_MAX_FRAME_SIZE {}", p, v);
 					if (v < 16384 || v > 16777215) {
 						p.goaway(Http2Processor.PROTOCOL_ERROR);
 						return null;
@@ -65,6 +75,7 @@ public final FrameReader process(Buffers buf) throws InterruptedException {
 					p.frame = v;
 					break;
 				case 6:
+					logger.trace("{}: SETTINGS_MAX_HEADER_LIST_SIZE {}", p, v);
 //						headerList = v;
 					break;
 				default: