diff --git a/lib/resty/http2.lua b/lib/resty/http2.lua
index 3e4ed22..0087b77 100644
--- a/lib/resty/http2.lua
+++ b/lib/resty/http2.lua
@@ -169,15 +169,16 @@ function _M.new(opts)
     local session
     local err
     local ok
+    local reuse_cnt
+    reuse_cnt, err = ctx:getreusedtimes()
 
-    if key and session_pool[key] then
+    if key and session_pool[key] and reuse_cnt ~= nil and reuse_cnt ~= 0 then
         session = session_pool[key]
         session_pool[key] = nil
         ok, err = session:attach(recv, send, ctx)
         if not ok then
             return nil, err
         end
-
     else
         session, err = h2_protocol.session(recv, send, ctx, preread_size,
                                            max_concurrent_stream,
diff --git a/lib/resty/http2/protocol.lua b/lib/resty/http2/protocol.lua
index c633c4e..e6bcd7d 100644
--- a/lib/resty/http2/protocol.lua
+++ b/lib/resty/http2/protocol.lua
@@ -243,7 +243,7 @@ function _M:submit_request(headers, no_body, priority, pad)
 
     local total = self.total_streams
     if total == self.max_streams then
-        return nil, h2_error.STRERAM_OVERFLOW
+        return nil, h2_error.STREAM_FLOW_CONTROL_ERROR
     end
 
     if self.goaway_sent or self.goaway_received then