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hbase region server can't connect to master

hbase region server can't connect to master

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Hi,

 

hbase regionserver can't connect to master, however connectivity exists

 

# master
2020-03-21 02:36:53,614 INFO [Thread-16] master.ServerManager: Waiting on regionserver count=0; waited=3174901ms, expecting min=1 server(s), max=NO_LIMIT server(s), timeout=30000ms, lastChange=-3174901ms
2020-03-21 02:36:54,287 WARN [master/gl-hdp-ctrl03:16000] assignment.AssignmentManager: No servers available; cannot place 1 unassigned regions.

# region server
Caused by: java.net.ConnectException: Call to gl-hdp-ctrl03.local/192.168.20.248:16000 failed on connection exception: org.apache.hbase.thirdparty.io.netty.channel.ConnectTimeoutException: connection timed out: gl-hdp-ctrl03.local/192.168.20.248:16000
at org.apache.hadoop.hbase.ipc.IPCUtil.wrapException(IPCUtil.java:166)
at org.apache.hadoop.hbase.ipc.AbstractRpcClient.onCallFinished(AbstractRpcClient.java:390)
at org.apache.hadoop.hbase.ipc.AbstractRpcClient.access$100(AbstractRpcClient.java:95)
at org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:410)
at org.apache.hadoop.hbase.ipc.AbstractRpcClient$3.run(AbstractRpcClient.java:406)
at org.apache.hadoop.hbase.ipc.Call.callComplete(Call.java:103)
at org.apache.hadoop.hbase.ipc.Call.setException(Call.java:118)


# test connectivity from region server to master
$ telnet gl-hdp-ctrl03.local 16000
Trying 192.168.20.248...
Connected to gl-hdp-ctrl03.local.
Escape character is '^]'.

 

any thoughts?

thank you