diff --git a/hstream-kafka/app/Main.hs b/hstream-kafka/app/Main.hs
index d89861791..7619d091f 100644
--- a/hstream-kafka/app/Main.hs
+++ b/hstream-kafka/app/Main.hs
@@ -5,6 +5,7 @@ import           Control.Monad
 import qualified Data.ByteString                as BS
 import           Data.Int
 import qualified Data.Vector                    as V
+import qualified HStream.Logger                 as Log
 import qualified Kafka.Protocol.Encoding        as K
 import qualified Kafka.Protocol.Message         as K
 import qualified Network.Socket                 as NW
@@ -15,9 +16,11 @@ import           HStream.Kafka.Client.CliParser
 import           HStream.Kafka.Client.Core
 import           HStream.Kafka.Client.Network
 
+
 main :: IO ()
 main = do
-  (cmd, opts) <- runKafkaCliParser
+  parsed@(cmd, opts) <- runKafkaCliParser
+  Log.debug . Log.buildString $ "command and options: " <> show parsed
   case cmd of
     Nodes               -> handleCmdNodes opts
     Topics              -> handleCmdTopics opts
diff --git a/hstream-kafka/client/HStream/Kafka/Client/CliParser.hs b/hstream-kafka/client/HStream/Kafka/Client/CliParser.hs
index 2442809d2..4deddec6b 100644
--- a/hstream-kafka/client/HStream/Kafka/Client/CliParser.hs
+++ b/hstream-kafka/client/HStream/Kafka/Client/CliParser.hs
@@ -19,6 +19,7 @@ data Command
   | DeleteTopic String
   | Groups
   | DescribeGroup String
+  deriving (Show)
 
 data Options = Options
   { brokers        :: Maybe String,
@@ -27,6 +28,7 @@ data Options = Options
     schemaRegistry :: Maybe String,
     verbose        :: Bool
   }
+  deriving (Show)
 
 parseCommand :: Parser Command
 parseCommand =
diff --git a/hstream-kafka/client/HStream/Kafka/Client/Core.hs b/hstream-kafka/client/HStream/Kafka/Client/Core.hs
index 8ef94876b..3aaa995b2 100644
--- a/hstream-kafka/client/HStream/Kafka/Client/Core.hs
+++ b/hstream-kafka/client/HStream/Kafka/Client/Core.hs
@@ -6,6 +6,7 @@ import qualified Data.ByteString                as BS
 import           Data.Int
 import qualified Data.Text                      as T
 import qualified Data.Vector                    as V
+import qualified HStream.Logger                 as Log
 import qualified Kafka.Protocol.Encoding        as K
 import qualified Kafka.Protocol.Message         as K
 import qualified Network.Socket                 as NW
@@ -21,6 +22,7 @@ defaultTimeoutMs = 5000
 
 getAllMetadata :: Options -> IO K.MetadataResponseV1
 getAllMetadata opts = do
+  Log.debug . Log.buildString $ "getAllMetadata: begin"
   let reqHeader = K.RequestHeader
                     { K.requestApiKey        = 3
                     , K.requestApiVersion    = 1
@@ -32,16 +34,22 @@ getAllMetadata opts = do
                     (K.KaArray $ Just V.empty)
       reqBs'    = K.runPut reqHeader <> K.runPut @K.MetadataRequestV1 reqBody
       reqLen    = K.runPut @Int32 $ fromIntegral (BS.length reqBs')
-      reqBs     = reqLen <> reqBs
-  withSock opts $ \sock -> do
+      reqBs     = reqLen <> reqBs'
+  Log.debug . Log.buildString $ "getAllMetadata: ready to send"
+  ret <- withSock opts $ \sock -> do
+    Log.debug . Log.buildString $ "getAllMetadata: conn"
     NW.sendAll sock reqBs
+    Log.debug . Log.buildString $ "getAllMetadata: req sent"
     recvResp @K.MetadataResponseV1 sock
+  Log.debug . Log.buildString $ "getAllMetadata: end"
+  pure ret
 
 -- describeConfigs :: Options -> IO K.DescribeConfigsV4
 -- describeConfigs opts = undefined
 
 handleCmdNodes :: Options -> IO ()
 handleCmdNodes opts = do
+  Log.debug . Log.buildString $ "handleCmdNodes: begin"
   K.MetadataResponseV1 brokers controllerId _topics <- getAllMetadata opts
   let titles   = ["ID", "ADDRESS", "CONTROLLER"]
       lenses   = [ \(K.MetadataResponseBrokerV1 nodeId host port rack) -> show nodeId                   -- broker.nodeId
diff --git a/hstream-kafka/client/HStream/Kafka/Client/Network.hs b/hstream-kafka/client/HStream/Kafka/Client/Network.hs
index 3470f6f66..1c0a8a0e4 100644
--- a/hstream-kafka/client/HStream/Kafka/Client/Network.hs
+++ b/hstream-kafka/client/HStream/Kafka/Client/Network.hs
@@ -14,7 +14,7 @@ import           Options.Applicative            as AP
 import           HStream.Kafka.Client.CliParser
 
 defaultAddr = "127.0.0.1"
-defaultPort = 33389
+defaultPort = 44243
 
 withSock :: Options -> (NW.Socket -> IO a) -> IO a
 withSock opts talk = do