[GitHub] [pulsar] rocketraman commented on issue #5202: Incorrect msgBacklog value

[GitBox <gi...@apache.org>]

rocketraman commented on issue #5202: Incorrect msgBacklog value
URL: https://github.com/apache/pulsar/issues/5202#issuecomment-542044367
 
 
   I have this issue as well... one of my subscriptions to a partitioned topic is showing a backlog of 1 message, but that is incorrect -- the backlog is actually 0.
   
   Partitioned stats:
   
   ```
   {
     "msgRateIn" : 0.0,
     "msgThroughputIn" : 0.0,
     "msgRateOut" : 0.0,
     "msgThroughputOut" : 0.0,
     "averageMsgSize" : 0.0,
     "storageSize" : 2189,
     "publishers" : [ {
       "msgRateIn" : 0.0,
       "msgThroughputIn" : 0.0,
       "averageMsgSize" : 0.0,
       "producerId" : 0
     } ],
     "subscriptions" : {
       "__compaction" : {
         "msgRateOut" : 0.0,
         "msgThroughputOut" : 0.0,
         "msgRateRedeliver" : 0.0,
         "msgBacklog" : 0,
         "blockedSubscriptionOnUnackedMsgs" : false,
         "msgDelayed" : 0,
         "unackedMessages" : 0,
         "msgRateExpired" : 0.0,
         "consumers" : [ ],
         "isReplicated" : false
       },
       "test-xxx" : {
         "msgRateOut" : 0.0,
         "msgThroughputOut" : 0.0,
         "msgRateRedeliver" : 0.0,
         "msgBacklog" : 1,
         "blockedSubscriptionOnUnackedMsgs" : false,
         "msgDelayed" : 0,
         "unackedMessages" : 1,
         "msgRateExpired" : 0.0,
         "consumers" : [ {
           "msgRateOut" : 0.0,
           "msgThroughputOut" : 0.0,
           "msgRateRedeliver" : 0.0,
           "availablePermits" : 998,
           "unackedMessages" : 1,
           "blockedConsumerOnUnackedMsgs" : false
         } ],
         "isReplicated" : false
       }
     },
     "replication" : { },
     "metadata" : {
       "partitions" : 1
     },
     "partitions" : { }
   }
   ```
   
   and internal stats:
   
   ```
   {
     "entriesAddedCounter" : 28,
     "numberOfEntries" : 8,
     "totalSize" : 19297,
     "currentLedgerEntries" : 7,
     "currentLedgerSize" : 17114,
     "lastLedgerCreatedTimestamp" : "2019-10-14T14:46:51.57Z",
     "waitingCursorsCount" : 268,
     "pendingAddEntriesCount" : 0,
     "lastConfirmedEntry" : "81:6",
     "state" : "LedgerOpened",
     "ledgers" : [ {
       "ledgerId" : 81,
       "entries" : 0,
       "size" : 0,
       "offloaded" : false
     } ],
     "cursors" : {
       "__compaction" : {
         "markDeletePosition" : "81:6",
         "readPosition" : "81:7",
         "waitingReadOp" : false,
         "pendingReadOps" : 0,
         "messagesConsumedCounter" : 28,
         "cursorLedger" : 85,
         "cursorLedgerLastEntry" : 3,
         "individuallyDeletedMessages" : "[]",
         "lastLedgerSwitchTimestamp" : "2019-10-15T05:22:53.273Z",
         "state" : "Open",
         "numberOfEntriesSinceFirstNotAckedMessage" : 1,
         "totalNonContiguousDeletedMessagesRange" : 0,
         "properties" : {
           "CompactedTopicLedger" : 86
         }
       },
       "test-xxx" : {
         "markDeletePosition" : "81:6",
         "readPosition" : "81:7",
         "waitingReadOp" : true,
         "pendingReadOps" : 0,
         "messagesConsumedCounter" : 27,
         "cursorLedger" : 84,
         "cursorLedgerLastEntry" : 5,
         "individuallyDeletedMessages" : "[]",
         "lastLedgerSwitchTimestamp" : "2019-10-15T05:19:49.576Z",
         "state" : "Open",
         "numberOfEntriesSinceFirstNotAckedMessage" : 1,
         "totalNonContiguousDeletedMessagesRange" : 0,
         "properties" : { }
       }
     }
   }
   ```

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