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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