lamber-ken opened a new pull request #1377: [HUDI-663] Fix HoodieDeltaStreamer offset not handled correctly URL: https://github.com/apache/incubator-hudi/pull/1377 ## What is the purpose of the pull request More detail, please go ahead with https://github.com/apache/incubator-hudi/issues/1375 1. the first commit content like following: ``` { "partitionToWriteStats" : { }, "compacted" : false, "extraMetadata" : { "ROLLING_STAT" : "{\n \"partitionToRollingStats\" : { },\n \"actionType\" : \"commit\"\n}", "schema" : "{\"type\":\"record\",\"name\":\"stock_ticks\",\"fields\":[{\"name\":\"volume\",\"type\":\"long\"},{\"name\":\"ts\",\"type\":\"string\"},{\"name\":\"symbol\",\"type\":\"string\"},{\"name\":\"year\",\"type\":\"int\"},{\"name\":\"month\",\"type\":\"string\"},{\"name\":\"high\",\"type\":\"double\"},{\"name\":\"low\",\"type\":\"double\"},{\"name\":\"key\",\"type\":\"string\"},{\"name\":\"date\",\"type\":\"string\"},{\"name\":\"close\",\"type\":\"double\"},{\"name\":\"open\",\"type\":\"double\"},{\"name\":\"day\",\"type\":\"string\"}]}", "deltastreamer.checkpoint.key" : "" }, "operationType" : "UPSERT", "fileIdAndRelativePaths" : { }, "totalRecordsDeleted" : 0, "totalLogRecordsCompacted" : 0, "totalScanTime" : 0, "totalCreateTime" : 0, "totalUpsertTime" : 0, "totalCompactedRecordsUpdated" : 0, "totalLogFilesCompacted" : 0, "totalLogFilesSize" : 0 } ``` 2. the second commit will use the last checkpoint `{}`, which means the fromoffset is `0`. but the previous messages may be removed because of kafka retention mechanism. so the low_watermark is greater than 0. ## Brief change log - double check the lastCheckpointStr ## Verify this pull request Follow steps: https://github.com/apache/incubator-hudi/issues/1375 ## Committer checklist - [X] Has a corresponding JIRA in PR title & commit - [X] Commit message is descriptive of the change - [ ] CI is green - [ ] Necessary doc changes done or have another open PR - [ ] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA.
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