Not able to login into Couchbase gui and attaching cbcollect_info utility output "output_file_28November.tar.gz" for analysis

Hi Couchbase Team
 
In one of our couchbase cluster the couchbase dashboard is not opening.
We are attaching the cbcollect_info utility output zip file
 
/* 
/opt/couchbase/bin./cbcollect_info output_file.zip
 
*/

 We are also attaching the output of curl http://*.*.*.*:8091/pools/default/
 
-bash-4.2$ /bin/curl http://*.*.*.*:8091/pools/default/
{"storageTotals":{"ram":

{"total":1622227681280,"quotaTotal":1287908229120,"quotaUsed":1287908229120,"used":1561608790016,"usedByData":742611883560,"quotaUsedPerNode":429302743040,"quotaTotalPerNode":429302743040}

,"hdd":{"total":2184523923456,"quotaTotal":2184523923456,"used":1002029743799,"usedByData":848883729357,"free":665671355598}},"ftsMemoryQuota":512,"indexMemoryQuota":512,"memoryQuota":409415,"name":"default","alerts":[],"alertsSilenceURL":"/controller/resetAlerts?token=0&uuid=f4ec72368e1fa22346a196cdc12bdd00","nodes":[{"systemStats":

{"cpu_utilization_rate":5.68284322569006,"swap_total":205084684288,"swap_used":209809408,"mem_total":540741836800,"mem_free":236063260672}

,"interestingStats":{"cmd_get":82,"couch_docs_actual_disk_size":285721883953,"couch_docs_data_size":271342567466,"couch_spatial_data_size":0,"couch_spatial_disk_size":0,"couch_views_actual_disk_size":286672,"couch_views_data_size":286672,"curr_items":123732991,"curr_items_tot":247461019,"ep_bg_fetched":0,"get_hits":58,"mem_used":247555274192,"ops":82,"vb_replica_curr_items":123728028},"uptime":"11189673","memoryTotal":540741836800,"memoryFree":236063260672,"mcdMemoryReserved":412553,"mcdMemoryAllocated":412553,"couchApiBase":"http://10.139.39.212:8092/","clusterMembership":"active","recoveryType":"none","status":"healthy","otpNode":"ns_1@10.139.39.212","hostname":"10.139.39.212:8091","clusterCompatibility":262149,"version":"4.5.1-2844-community","os":"x86_64-unknown-linux-gnu","ports":{"proxy":11211,"direct":11210},"services":["index","kv","n1ql"]},{"systemStats":

{"cpu_utilization_rate":6.101908156846299,"swap_total":206158426112,"swap_used":43868160,"mem_total":540742922240,"mem_free":274810822656}

,"interestingStats":{"cmd_get":56,"couch_docs_actual_disk_size":279720479543,"couch_docs_data_size":272325114265,"couch_spatial_data_size":0,"couch_spatial_disk_size":0,"couch_views_actual_disk_size":595765,"couch_views_data_size":595765,"curr_items":124088655,"curr_items_tot":248187594,"ep_bg_fetched":0,"get_hits":36,"mem_used":237625214264,"ops":56,"vb_replica_curr_items":124098939},"uptime":"11370191","memoryTotal":540742922240,"memoryFree":274810822656,"mcdMemoryReserved":412554,"mcdMemoryAllocated":412554,"couchApiBase":"http://10.139.39.31:8092/","clusterMembership":"active","recoveryType":"none","status":"healthy","otpNode":"ns_1@10.139.39.31","thisNode":true,"hostname":"10.139.39.31:8091","clusterCompatibility":262149,"version":"4.5.1-2844-community","os":"x86_64-unknown-linux-gnu","ports":{"proxy":11211,"direct":11210},"services":["index","kv","n1ql"]},{"systemStats":

{"cpu_utilization_rate":14.26163892985043,"swap_total":206158426112,"swap_used":203247616,"mem_total":540742922240,"mem_free":256167219200}

,"interestingStats":{"cmd_get":91,"couch_docs_actual_disk_size":279702929784,"couch_docs_data_size":271558411522,"couch_spatial_data_size":0,"couch_spatial_disk_size":0,"couch_views_actual_disk_size":3737553640,"couch_views_data_size":3737542070,"curr_items":123743715,"curr_items_tot":247482109,"ep_bg_fetched":0,"get_hits":60,"mem_used":257431395104,"ops":91,"vb_replica_curr_items":123738394},"uptime":"11065361","memoryTotal":540742922240,"memoryFree":256167219200,"mcdMemoryReserved":412554,"mcdMemoryAllocated":412554,"couchApiBase":"http://10.139.39.36:8092/","clusterMembership":"active","recoveryType":"none","status":"healthy","otpNode":"ns_1@10.139.39.36","hostname":"10.139.39.36:8091","clusterCompatibility":262149,"version":"4.5.1-2844-community","os":"x86_64-unknown-linux-gnu","ports":{"proxy":11211,"direct":11210},"services":["index","kv","n1ql"]}],"buckets":{"uri":"/pools/default/buckets?v=62366055&uuid=f4ec72368e1fa22346a196cdc12bdd00","terseBucketsBase":"/pools/default/b/","terseStreamingBucketsBase":"/pools/default/bs/"},"remoteClusters":{"uri":"/pools/default/remoteClusters?uuid=f4ec72368e1fa22346a196cdc12bdd00","validateURI":"/pools/default/remoteClusters?just_validate=1"},"controllers":{"addNode":

{"uri":"/controller/addNodeV2?uuid=f4ec72368e1fa22346a196cdc12bdd00"}

,"rebalance":{"uri":"/controller/rebalance?uuid=f4ec72368e1fa22346a196cdc12bdd00"},"failOver":{"uri":"/controller/failOver?uuid=f4ec72368e1fa22346a196cdc12bdd00"},"startGracefulFailover":{"uri":"/controller/startGracefulFailover?uuid=f4ec72368e1fa22346a196cdc12bdd00"},"reAddNode":{"uri":"/controller/reAddNode?uuid=f4ec72368e1fa22346a196cdc12bdd00"},"reFailOver":{"uri":"/controller/reFailOver?uuid=f4ec72368e1fa22346a196cdc12bdd00"},"ejectNode":{"uri":"/controller/ejectNode?uuid=f4ec72368e1fa22346a196cdc12bdd00"},"setRecoveryType":{"uri":"/controller/setRecoveryType?uuid=f4ec72368e1fa22346a196cdc12bdd00"},"setAutoCompaction":{"uri":"/controller/setAutoCompaction?uuid=f4ec72368e1fa22346a196cdc12bdd00","validateURI":"/controller/setAutoCompaction?just_validate=1"},"clusterLogsCollection":{"startURI":"/controller/startLogsCollection?uuid=f4ec72368e1fa22346a196cdc12bdd00","cancelURI":"/controller/cancelLogsCollection?uuid=f4ec72368e1fa22346a196cdc12bdd00"},"replication":{"createURI":"/controller/createReplication?uuid=f4ec72368e1fa22346a196cdc12bdd00","validateURI":"/controller/createReplication?just_validate=1"}},"rebalanceStatus":"none","rebalanceProgressUri":"/pools/default/rebalanceProgress","stopRebalanceUri":"/controller/stopRebalance?uuid=f4ec72368e1fa22346a196cdc12bdd00","nodeStatusesUri":"/nodeStatuses","maxBucketCount":10,"autoCompactionSettings":{"parallelDBAndViewCompaction":false,"allowedTimePeriod":

{"fromHour":1,"toHour":7,"fromMinute":0,"toMinute":0,"abortOutside":true}

,"databaseFragmentationThreshold":{"percentage":5,"size":"undefined"},"viewFragmentationThreshold":{"percentage":5,"size":"undefined"},"indexCompactionMode":"full","indexCircularCompaction":{"daysOfWeek":"Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday","interval":{"fromHour":0,"toHour":7,"fromMinute":0,"toMinute":0,"abortOutside":false}},"indexFragmentationThreshold":{"percentage":30}},"tasks":{"uri":"/pools/default/tasks?v=25234002"},"counters":{"rebalance_success":10,"rebalance_start":11,"failover_node":4,"rebalance_stop":1},"indexStatusURI":"/indexStatus?v=57048506","checkPermissionsURI":"/pools/default/checkPermissions?v=118898019","serverGroupsUri":"/pools/default/serverGroups?v=51560345"}-
 
 
When we grep for various types of  "Exception"  keyword in th e couchbase logfile path /opt/couchbase/var/lib/couchbase/logs, we didnt find any output.