diff --git a/Hadoop-Compatible-File-System.md b/Hadoop-Compatible-File-System.md
index 0fe0158..c0b3b31 100644
--- a/Hadoop-Compatible-File-System.md
+++ b/Hadoop-Compatible-File-System.md
@@ -179,5 +179,13 @@ This is different from many other HCFS options. If native shared libraries are n
 One of the headache with complicated Java systems is the jar runtime dependency problem, which is resolved by Go's build time dependency resolution. For this SeaweedFS hadoop client, the required jars are mostly shaded and packaged as one fat jar, so there are no extra jar files needed.
 
 ## Note
-* use `-Djava.net.preferIPv4Stack=true` if possible, see https://github.com/netty/netty/issues/6454
-* See [[Security-Configuration#for-java-grpc]] if you enabled gRpc security.
\ No newline at end of file
+### use `-Djava.net.preferIPv4Stack=true` if possible, see https://github.com/netty/netty/issues/6454
+error message:
+```
+Failed construction of Master: class org.apache.hadoop.hbase.master.HMasterCommandLine$LocalHMasterConnection refused: localhost/0:0:0:0:0:0:0:1:18888
+```
+
+### See [[Security-Configuration#for-java-grpc]] if you enabled gRpc security.
+```
+Failed construction of Master: class org.apache.hadoop.hbase.master.HMasterCommandLine$LocalHMasternot an SSL/TLS record: 000006040000000000000500004000
+```