Cluster Join Error

Hello,
We are deploying couchbase 6.0.0 community version on aws using docker. We have a main server running. We then spin off a second EC2 is a second subset and run the bellow join command:
"/opt/couchbase/bin/couchbase-cli server-add -c "${hname1}" --username ${uname} --password ${password} --server-add "${hname}" --server-add-username {uname} --server-add-password ${password}

We get the following error:
ERROR: Join completion call failed. Got HTTP status 500 from REST call post to http://ip-10-77-60-123.ec2.internal:8091/completeJoin. Body was: "[\"Unexpected server error, request logged.\"]"

Looking into the error.log file, I see this error:

[cluster:error,2021-04-27T15:44:07.414Z,ns_1@ip-10-77-60-123.ec2.internal:ns_cluster<0.152.0>:ns_cluster:perform_actual_join:1114]Error during join: {error,
                    {badmatch,
                     {error,
                      [{'ns_1@172.17.0.2',
                        {'EXIT',
                         {{nodedown,'ns_1@172.17.0.2'},
                          {gen_server,call,
                           [{ns_config_remote,'ns_1@172.17.0.2'},
                            get_compressed,10000]}}}}]}},
                    [{ns_cluster,perform_actual_join,2,
                      [{file,"src/ns_cluster.erl"},{line,1106}]},
                     {ns_cluster,do_complete_join,1,
                      [{file,"src/ns_cluster.erl"},{line,1040}]},
                     {ns_cluster,handle_call,3,
                      [{file,"src/ns_cluster.erl"},{line,187}]},
                     {gen_server,handle_msg,5,
                      [{file,"gen_server.erl"},{line,585}]},
                     {proc_lib,init_p_do_apply,3,
                      [{file,"proc_lib.erl"},{line,239}]}]}
[ns_server:error,2021-04-27T15:44:08.816Z,ns_1@ip-10-77-60-123.ec2.internal:<0.1759.0>:menelaus_web:loop:143]Server error during processing: ["web request failed",
                                 {path,"/completeJoin"},
                                 {method,'POST'},
                                 {type,exit},
                                 {what,
                                  {{{badmatch,
                                     {error,
                                      [{'ns_1@172.17.0.2',
                                        {'EXIT',
                                         {{nodedown,'ns_1@172.17.0.2'},
                                          {gen_server,call,
                                           [{ns_config_remote,
                                             'ns_1@172.17.0.2'},
                                            get_compressed,10000]}}}}]}},
                                    [{ns_cluster,perform_actual_join,2,
                                      [{file,"src/ns_cluster.erl"},
                                       {line,1106}]},
                                     {ns_cluster,do_complete_join,1,
                                      [{file,"src/ns_cluster.erl"},
                                       {line,1040}]},
                                     {ns_cluster,handle_call,3,
                                      [{file,"src/ns_cluster.erl"},
                                       {line,187}]},
                                     {gen_server,handle_msg,5,
                                      [{file,"gen_server.erl"},{line,585}]},
                                     {proc_lib,init_p_do_apply,3,
                                      [{file,"proc_lib.erl"},{line,239}]}]},
                                   {gen_server,call,
                                    [ns_cluster,
                                     {complete_join,
                                      [{<<"targetNode">>,
                                        <<"ns_1@[redacted]">>},
                                       {<<"requestedServices">>,[<<"kv">>]},
                                       {<<"availableStorage">>,
                                        {struct,
                                         [{<<"hdd">>,
                                           [{struct,
                                             [{<<"path">>,<<"/">>},
                                              {<<"sizeKBytes">>,67096556},
                                              {<<"usagePercent">>,6}]},
                                            {struct,
                                             [{<<"path">>,<<"/dev">>},
                                              {<<"sizeKBytes">>,65536},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,
                                               <<"/sys/fs/cgroup">>},
                                              {<<"sizeKBytes">>,3932480},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,<<"/dev/shm">>},
                                              {<<"sizeKBytes">>,65536},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,
                                               <<"/etc/resolv.conf">>},
                                              {<<"sizeKBytes">>,67096556},
                                              {<<"usagePercent">>,6}]},
                                            {struct,
                                             [{<<"path">>,<<"/etc/hostname">>},
                                              {<<"sizeKBytes">>,67096556},
                                              {<<"usagePercent">>,6}]},
                                            {struct,
                                             [{<<"path">>,<<"/etc/hosts">>},
                                              {<<"sizeKBytes">>,67096556},
                                              {<<"usagePercent">>,6}]},
                                            {struct,
                                             [{<<"path">>,
                                               <<"/opt/couchbase/var">>},
                                              {<<"sizeKBytes">>,20511312},
                                              {<<"usagePercent">>,4}]},
                                            {struct,
                                             [{<<"path">>,<<"/proc/acpi">>},
                                              {<<"sizeKBytes">>,3932480},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,<<"/proc/kcore">>},
                                              {<<"sizeKBytes">>,65536},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,<<"/proc/keys">>},
                                              {<<"sizeKBytes">>,65536},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,
                                               <<"/proc/latency_stats">>},
                                              {<<"sizeKBytes">>,65536},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,
                                               <<"/proc/timer_list">>},
                                              {<<"sizeKBytes">>,65536},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,
                                               <<"/proc/sched_debug">>},
                                              {<<"sizeKBytes">>,65536},
                                              {<<"usagePercent">>,0}]},
                                            {struct,
                                             [{<<"path">>,<<"/sys/firmware">>},
                                              {<<"sizeKBytes">>,3932480},
                                              {<<"usagePercent">>,0}]}]}]}},
                                       {<<"storageTotals">>,
                                        {struct,
                                         [{<<"ram">>,
                                           {struct,
                                            [{<<"total">>,8053723136},
                                             {<<"quotaTotal">>,4311744512},
                                             {<<"quotaUsed">>,2151677952},
                                             {<<"used">>,5611556864},
                                             {<<"usedByData">>,62106936},
                                             {<<"quotaUsedPerNode">>,
                                              2151677952},
                                             {<<"quotaTotalPerNode">>,
                                              4311744512}]}},
                                          {<<"hdd">>,
                                           {struct,
                                            [{<<"total">>,21003583488},
                                             {<<"quotaTotal">>,21003583488},
                                             {<<"used">>,840143339},
                                             {<<"usedByData">>,78508018},
                                             {<<"free">>,20163440149}]}}]}},
                                       {<<"storage">>,
                                        {struct,
                                         [{<<"ssd">>,[]},
                                          {<<"hdd">>,
                                           [{struct,
                                             [{<<"path">>,
                                               <<"/opt/couchbase/var/lib/couchbase/data">>},
                                              {<<"index_path">>,
                                               <<"/opt/couchbase/var/lib/couchbase/data">>},
                                              {<<"cbas_dirs">>,
                                               [<<"/opt/couchbase/var/lib/couchbase/data">>]},
                                              {<<"java_home">>,<<>>},
                                              {<<"quotaMb">>,<<"none">>},
                                              {<<"state">>,<<"ok">>}]}]}]}},
                                       {<<"systemStats">>,
                                        {struct,
                                         [{<<"cpu_utilization_rate">>,
                                           11.11111111111111},
                                          {<<"swap_total">>,0},
                                          {<<"swap_used">>,0},
                                          {<<"mem_total">>,8053723136},
                                          {<<"mem_free">>,5316153344}]}},
                                       {<<"interestingStats">>,
                                        {struct,
                                         [{<<"cmd_get">>,0.0},
                                          {<<"couch_docs_actual_disk_size">>,
                                           78508018},
                                          {<<"couch_docs_data_size">>,
                                           42178560},
                                          {<<"couch_spatial_data_size">>,0},
                                          {<<"couch_spatial_disk_size">>,0},
                                          {<<"couch_views_actual_disk_size">>,
                                           0},
                                          {<<"couch_views_data_size">>,0},
                                          {<<"curr_items">>,0},
                                          {<<"curr_items_tot">>,0},
                                          {<<"ep_bg_fetched">>,0.0},
                                          {<<"get_hits">>,0.0},
                                          {<<"mem_used">>,62106936},
                                          {<<"ops">>,0.0},
                                          {<<"vb_active_num_non_resident">>,0},
                                          {<<"vb_replica_curr_items">>,0}]}},
                                       {<<"uptime">>,<<"63454">>},
                                       {<<"memoryTotal">>,8053723136},
                                       {<<"memoryFree">>,5316153344},
                                       {<<"mcdMemoryReserved">>,6144},
                                       {<<"mcdMemoryAllocated">>,6144},
                                       {<<"couchApiBase">>,
                                        <<"http://172.17.0.2:8092/">>},
                                       {<<"otpCookie">>,
                                        <<"f016ac28c49a6f83c4851fb7e5376153e57985dabe7fe3fdced32f1671b9718f">>},
                                       {<<"clusterMembership">>,<<"active">>},
                                       {<<"recoveryType">>,<<"none">>},
                                       {<<"status">>,<<"healthy">>},
                                       {<<"otpNode">>,<<"ns_1@172.17.0.2">>},
                                       {<<"thisNode">>,true},
                                       {<<"hostname">>,<<"172.17.0.2:8091">>},
                                       {<<"clusterCompatibility">>,393216},
                                       {<<"version">>,
                                        <<"6.0.0-1693-community">>},
                                       {<<"os">>,
                                        <<"x86_64-unknown-linux-gnu">>},
                                       {<<"cpuCount">>,2},
                                       {<<"ports">>,
                                        {struct,
                                         [{<<"proxy">>,11211},
                                          {<<"direct">>,11210}]}},
                                       {<<"services">>,
                                        [<<"index">>,<<"kv">>,<<"n1ql">>]},
                                       {<<"memoryQuota">>,4112},
                                       {<<"indexMemoryQuota">>,1028},
                                       {<<"ftsMemoryQuota">>,425},
                                       {<<"cbasMemoryQuota">>,1028},
                                       {<<"eventingMemoryQuota">>,256}]},
                                     120000]}}},
                                 {trace,
                                  [{gen_server,call,3,
                                    [{file,"gen_server.erl"},{line,188}]},
                                   {menelaus_web_cluster,
                                    handle_complete_join,1,
                                    [{file,"src/menelaus_web_cluster.erl"},
                                     {line,131}]},
                                   {request_throttler,do_request,3,
                                    [{file,"src/request_throttler.erl"},
                                     {line,59}]},
                                   {menelaus_web,loop,2,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,121}]},
                                   {mochiweb_http,headers,5,
                                    [{file,
                                      "/home/couchbase/jenkins/workspace/couchbase-server-unix/couchdb/src/mochiweb/mochiweb_http.erl"},
                                     {line,94}]},
                                   {proc_lib,init_p_do_apply,3,
                                    [{file,"proc_lib.erl"},{line,239}]}]}]