diff --git a/jetty-http2/http2-common/src/test/resources/jetty-logging.properties b/jetty-http2/http2-common/src/test/resources/jetty-logging.properties
new file mode 100644
index 00000000000..31b37987e9a
--- /dev/null
+++ b/jetty-http2/http2-common/src/test/resources/jetty-logging.properties
@@ -0,0 +1,10 @@
+org.eclipse.jetty.util.log.class=org.eclipse.jetty.util.log.StdErrLog
+org.eclipse.jetty.LEVEL=INFO
+org.eclipse.jetty.STACKS=true
+org.eclipse.jetty.SOURCE=false
+org.eclipse.jetty.http2.hpack.LEVEL=debug
+#org.eclipse.jetty.spdy.LEVEL=DEBUG
+#org.eclipse.jetty.server.LEVEL=DEBUG
+#org.eclipse.jetty.io.LEVEL=DEBUG
+#org.eclipse.jetty.io.ssl.LEVEL=DEBUG
+#org.eclipse.jetty.spdy.server.LEVEL=DEBUG
diff --git a/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackContext.java b/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackContext.java
index 846ab01cda7..9e1af505991 100644
--- a/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackContext.java
+++ b/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackContext.java
@@ -179,17 +179,19 @@ public class HpackContext
         }
     };
     
-    
     HpackContext(int maxHeaderTableSize)
     {
         _maxHeaderTableSizeInBytes=maxHeaderTableSize;
         int guesstimateEntries = 10+maxHeaderTableSize/(32+10+10);
         _headerTable=new HeaderTable(guesstimateEntries,guesstimateEntries+10);
+        if (LOG.isDebugEnabled())
+            LOG.debug(String.format("HdrTbl[%x] created max=%d",hashCode(),maxHeaderTableSize));
     }
     
     public void resize(int newMaxHeaderTableSize)
     {
-        LOG.debug("HdrTbl resized {}",newMaxHeaderTableSize);
+        if (LOG.isDebugEnabled())
+            LOG.debug(String.format("HdrTbl[%x] resized max=%d->%d",hashCode(),_maxHeaderTableSizeInBytes,newMaxHeaderTableSize));
         _maxHeaderTableSizeInBytes=newMaxHeaderTableSize;
         int guesstimateEntries = 10+newMaxHeaderTableSize/(32+10+10);
         evict();
@@ -232,7 +234,8 @@ public class HpackContext
         int size = entry.getSize();
         if (size>_maxHeaderTableSizeInBytes)
         {
-            LOG.debug("!added {} too big",field);
+            if (LOG.isDebugEnabled())
+                LOG.debug(String.format("HdrTbl[%x] !added size %d>%d",hashCode(),size,_maxHeaderTableSizeInBytes));
             return null;
         }
         _headerTableSizeInBytes+=size;
@@ -240,7 +243,8 @@ public class HpackContext
         _fieldMap.put(field,entry);
         _nameMap.put(StringUtil.asciiToLowerCase(field.getName()),entry);
 
-        LOG.debug("HdrTbl added {}",entry);
+        if (LOG.isDebugEnabled())
+            LOG.debug(String.format("HdrTbl[%x] added %s",hashCode(),entry));
         evict();
         return entry;
     }
@@ -290,7 +294,8 @@ public class HpackContext
     
     public void clearReferenceSet()
     {
-        LOG.debug("RefSet cleared");
+        if (LOG.isDebugEnabled())
+            LOG.debug(String.format("RefSet[%x] cleared",hashCode()));
         Entry entry = _refSet._refSetNext;
         while(entry!=_refSet)
         {
@@ -312,7 +317,8 @@ public class HpackContext
                 entry._used=false;
             else
             {
-                LOG.debug("RefSet remove unused {}",entry);
+                if (LOG.isDebugEnabled())
+                    LOG.debug(String.format("RefSet[%x] remove unused",hashCode(),entry));
                 // encode the reference to remove it
                 buffer.put((byte)0x80);
                 NBitInteger.encode(buffer,7,index(entry));
@@ -331,7 +337,8 @@ public class HpackContext
                 entry._used=false;
             else
             {
-                LOG.debug("RefSet emit unused {}",entry);
+                if (LOG.isDebugEnabled())
+                    LOG.debug(String.format("RefSet[%x] emit unref",hashCode(),entry));
                 builder.emit(entry.getHttpField());
             }
             
@@ -378,7 +385,8 @@ public class HpackContext
         while (_headerTableSizeInBytes>_maxHeaderTableSizeInBytes)
         {
             Entry entry = _headerTable.pollUnsafe();
-            LOG.debug("HdrTbl evict {}",entry);
+            if (LOG.isDebugEnabled())
+                LOG.debug(String.format("HdrTbl[%x] evict %s",hashCode(),entry));
             _headerTableSizeInBytes-=entry.getSize();
             entry.removeFromRefSet();
             entry._index=-1;
@@ -497,7 +505,8 @@ public class HpackContext
             _refSetPrev=ctx._refSet._refSetPrev;
             ctx._refSet._refSetPrev._refSetNext=this;
             ctx._refSet._refSetPrev=this;
-            LOG.debug("RefSet added {}",this);
+            if (LOG.isDebugEnabled())
+                LOG.debug(String.format("RefSet[%x] added",ctx.hashCode(),this));
         }
 
         public boolean isInReferenceSet()
@@ -507,7 +516,8 @@ public class HpackContext
         
         public void removeFromRefSet()
         {
-            LOG.debug("RefSet remove {}",this);
+            if (LOG.isDebugEnabled())
+                LOG.debug(String.format("RefSet[?] remove %s",this));
             if (_refSetNext!=this)
             {
                 _refSetNext._refSetPrev=_refSetPrev;
diff --git a/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackDecoder.java b/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackDecoder.java
index fa7fbe08eb2..e74f80e8931 100644
--- a/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackDecoder.java
+++ b/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackDecoder.java
@@ -63,10 +63,12 @@ public class HpackDecoder
     
     public MetaData decode(ByteBuffer buffer)
     {           
+        if (LOG.isDebugEnabled())
+            LOG.debug(String.format("CtxTbl[%x] decoding",_context.hashCode()));
         while(buffer.hasRemaining())
         {
             if (LOG.isDebugEnabled())
-            {
+            {                
                 int l=Math.min(buffer.remaining(),16);
                 LOG.debug("decode  "+TypeUtil.toHexString(buffer.array(),buffer.arrayOffset()+buffer.position(),l)+(l<buffer.remaining()?"...":""));
             }
diff --git a/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackEncoder.java b/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackEncoder.java
index 97bc303a601..47fb19324e7 100644
--- a/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackEncoder.java
+++ b/jetty-http2/http2-hpack/src/main/java/org/eclipse/jetty/http2/hpack/HpackEncoder.java
@@ -124,6 +124,9 @@ public class HpackEncoder
     
     public void encode(ByteBuffer buffer, MetaData metadata)
     {
+        if (LOG.isDebugEnabled())
+            LOG.debug(String.format("CtxTbl[%x] encoding",_context.hashCode()));
+        
         // Check the header table sizes!
         int maxHeaderTableSize=Math.min(_remoteMaxHeaderTableSize,_localMaxHeaderTableSize);
         if (maxHeaderTableSize!=_context.getMaxHeaderTableSize())