indexer runtime panic when creating index

When I tried to create secondary index, I hit this issue. Please find commands and logs below.

2019-10-30T10:43:51 [INFO] building secondary index..

2019-10-30T10:43:51 [INFO] building secondary indexes

2019-10-30T10:43:51 [INFO] Running: /opt/couchbase/bin/cbindex -auth=Administrator:password -server 172.23.97.106:8091 -type create -bucket bucket-1 -fields=city -using plasma -index myindex -with=\"{\\\"defer_build\\\":true}\"

[172.23.97.81] run: /opt/couchbase/bin/cbindex -auth=Administrator:password -server 172.23.97.106:8091 -type create -bucket bucket-1 -fields=city -using plasma -index myindex -with=\"{\\\"defer_build\\\":true}\"

[172.23.97.81] out: 2019-10-30T10:43:52.073-07:00 [Error] PeerPipe.doRecieve() : ecounter error when received mesasage from Peer 172.23.97.106:9100.  Error = EOF. Kill Pipe.

[172.23.97.81] out: 2019-10-30T10:43:52.073-07:00 [Error] WatcherServer.runOnce() : Watcher terminated unexpectedly.

[172.23.97.81] out: 2019-10-30T10:43:52.073-07:00 [Error] Encountered error during create index.  Error: Terminate Request due to server termination

[172.23.97.81] out: 2019-10-30T10:43:52.073-07:00 [Error] Encountered error during create index.  Error: unexpected end of JSON input

[172.23.97.81] out: 2019-10-30T10:43:53.074-07:00 [Error] WatcherServer.runOnce() error : dial tcp 172.23.97.106:9100: connect: connection refused

[172.23.97.81] out: 2019-10-30T10:43:55.075-07:00 [Error] WatcherServer.runOnce() error : dial tcp 172.23.97.106:9100: connect: connection refused

 
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