Suddenly crash of server node

I have a cluster and last evening
suddenly i see this error in a server node:
Slogan: eheap_alloc: Cannot allocate 3280272216 bytes of memory (of type “heap”).
Why ?

Hi @Alessandro.79,

Can you post more detailed logs? Is this an ongoing problem? What version of Couchbase Server are you using?

Now this problem is more frequently…
My error.log report :

ns_server:error,2017-04-13T09:34:38.933+02:00,ns_1@couchbase02-xxxx.xx:index_status_keeper_worker<0.5590.922>:index_rest:get_json:45]Request to http://127.0.0.1:9102/getIndexStatus failed: {error,timeout}
[ns_server:error,2017-04-13T09:34:41.548+02:00,ns_1@couchbase02-xxxx.xx:<0.13389.928>:menelaus_web:loop:184]Server error during processing: ["web request failed",
                                 {path,"/poolsStreaming/default"},
                                 {method,'GET'},
                                 {type,exit},
                                 {what,
                                  {noproc,
                                   {gen_server,call,
                                    [index_status_keeper,
                                     get_indexes_version]}}},
                                 {trace,
                                  [{gen_server,call,2,
                                    [{file,"gen_server.erl"},{line,180}]},
                                   {menelaus_web,do_build_pool_info,4,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,1148}]},
                                   {menelaus_web,streaming_inner,3,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,1454}]},
                                   {menelaus_web,handle_streaming,4,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,1482}]},
                                   {request_throttler,do_request,3,
                                    [{file,"src/request_throttler.erl"},
                                     {line,59}]},
                                   {menelaus_web,loop,2,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,162}]},
                                   {mochiweb_http,headers,5,
                                    [{file,
                                      "/home/couchbase/jenkins/workspace/sherlock-unix/couchdb/src/mochiweb/mochiweb_http.erl"},
                                     {line,94}]},
                                   {proc_lib,init_p_do_apply,3,
                                    [{file,"proc_lib.erl"},{line,239}]}]}]
[ns_server:error,2017-04-13T09:34:42.269+02:00,ns_1@couchbase02-xxxx.xx:<0.17766.928>:menelaus_web:loop:184]Server error during processing: ["web request failed",
                                 {path,"/pools/default"},
                                 {method,'GET'},
                                 {type,exit},
                                 {what,
                                  {{noproc,
                                    {gen_server,call,
                                     [index_status_keeper,
                                      get_indexes_version]}},
                                   {gen_server,call,
                                    [<0.18230.928>,
                                     #Fun<menelaus_web_cache.2.70484883>,
                                     infinity]}}},
                                 {trace,
                                     [{gen_server,call,3,
                                    [{file,"gen_server.erl"},{line,188}]},
                                   {menelaus_web,handle_pool_info,2,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,1027}]},
                                   {request_throttler,do_request,3,
                                    [{file,"src/request_throttler.erl"},
                                     {line,59}]},
                                   {menelaus_web,loop,2,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,162}]},
                                   {mochiweb_http,headers,5,
                                    [{file,
                                      "/home/couchbase/jenkins/workspace/sherlock-unix/couchdb/src/mochiweb/mochiweb_http.erl"},
                                     {line,94}]},
                                   {proc_lib,init_p_do_apply,3,
                                    [{file,"proc_lib.erl"},{line,239}]}]}]
[ns_server:error,2017-04-13T09:34:44.869+02:00,ns_1@couchbase02-xxxx.xx:<0.14845.928>:menelaus_web:loop:184]Server error during processing: ["web request failed",
                                 {path,"/pools/default"},
                                 {method,'GET'},
                                 {type,exit},
                                 {what,
                                  {{noproc,
                                    {gen_server,call,
                                     [index_status_keeper,
                                      get_indexes_version]}},
                                   {gen_server,call,
                                    [<0.32305.859>,
                                     #Fun<menelaus_web_cache.2.70484883>,
                                     infinity]}}},
                                 {trace,
                            [{gen_server,call,3,
                                    [{file,"gen_server.erl"},{line,188}]},
                                   {menelaus_web,handle_pool_info,2,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,1027}]},
                                   {request_throttler,do_request,3,
                                    [{file,"src/request_throttler.erl"},
                                     {line,59}]},
                                   {menelaus_web,loop,2,
                                    [{file,"src/menelaus_web.erl"},
                                     {line,162}]},
                                   {mochiweb_http,headers,5,
                                    [{file,
                                      "/home/couchbase/jenkins/workspace/sherlock-unix/couchdb/src/mochiweb/mochiweb_http.erl"},
                                     {line,94}]},
                                   {proc_lib,init_p_do_apply,3,
                                    [{file,"proc_lib.erl"},{line,239}]}]}]
[ns_server:error,2017-04-13T09:34:45.260+02:00,ns_1@couchbase02-xxxx.xx:wait_link_to_couchdb_node<0.18474.928>:ns_server_nodes_sup:do_wait_link_to_couchdb_node:156]ns_couchdb_port({undefined,'ns_1@couchbase02-d-xxxx.xxxx$
[ns_server:error,2017-04-13T09:34:48.683+02:00,ns_1@couchbase02-xxxx.xx:ns_log<0.32140.859>:ns_log:handle_cast:209]unable to notify listeners because of badarg