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  1. Debezium
  2. DBZ-8068

Oracle histogram metrics are no longer printed in logs correctly

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      When the connector stops, we dump the output of the JMX metrics to the logs.  For the histogram metrics, this output is no longer usable, see below:

      2024-07-15 04:10:01,844 INFO  [io.deb.con.ora.log.LogMinerStreamingChangeEventSource] (debezium-oracleconnector-DBZ-change-event-source-coordinator) Streaming metrics dump: LogMinerStreamingChangeEventSourceMetrics{connectorConfig=io.debezium.connector.oracle.OracleConnectorConfig@39100b05, startTime=2024-07-14T12:49:29.182407769Z, clock=SystemClock[Z], currentScn=12341959735725, offsetScn=12341950686512, commitScn=12341955284435, oldestScn=12341950686513, oldestScnTime=2024-07-15T07:50:25Z, currentLogFileNames=[Ljava.lang.String;@1786d4ad, redoLogStatuses=[Ljava.lang.String;@e625314, databaseZoneOffset=Z, batchSize=100000, logSwitchCount=67, logMinerQueryCount=1112, sleepTime=0, minimumLogsMined=4, maximumLogsMined=4, maxBatchProcessingThroughput=322, timeDifference=0, processedRowsCount=41079380, activeTransactionCount=4, rolledBackTransactionCount=32589, oversizedTransactionCount=0, changesCount=1345436, scnFreezeCount=0, batchProcessingDuration=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$DurationHistogramMetric@406db638, fetchQueryDuration=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$DurationHistogramMetric@799cd513, commitDuration=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$DurationHistogramMetric@581e5531, lagFromSourceDuration=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$DurationHistogramMetric@44f857d5, miningSessionStartupDuration=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$DurationHistogramMetric@6909f504, parseTimeDuration=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$DurationHistogramMetric@7622817b, resultSetNextDuration=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$DurationHistogramMetric@5c3fe553, userGlobalAreaMemory=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$MaxLongValueMetric@5aff47fe, processGlobalAreaMemory=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$MaxLongValueMetric@7c783870, abandonedTransactionIds=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$LRUSet@1e3347dd, rolledBackTransactionIds=io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics$LRUSet@3d052c35} io.debezium.connector.oracle.logminer.LogMinerStreamingChangeEventSourceMetrics@7eb181f6 

              ccranfor@redhat.com Chris Cranford
              ccranfor@redhat.com Chris Cranford
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