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  1. Core Server
  2. SERVER-71634

mongodb4.2.23 can not downgrade to mongodb4.0.23

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    Description

      When I upgrade mongodb3.6.20 replication set, I follow the official instructions completely.
      Then  3.6.20 up to 4.0.28 is ok,  4.0.28 up to 4.2.23 is ok, 4.2.23 up to 4.4.17 is ok.

      When I downgrade the replication set, 4.4.17 down to 4.2.23 is ok, but 4.2.23 down to 4.0.28, then reports errors: "2022-11-22T16:03:49.271+0800 E STORAGE  [initandlisten] WiredTiger error (-31802) [1669104229:271646][28181:0x2b6d74d7aa80], connection: __log_open_verify, 985: unsupported WiredTiger file version: this build only supports versions up to 3, and the file is version 4: WT_ERROR: non-specific WiredTiger error Raw: [1669104229:271646][28181:0x2b6d74d7aa80], connection: __log_open_verify, 985: unsupported WiredTiger file version: this build only supports versio"

      And I found that: 3.6.20 up to 4.0.28, 4.0.28 up to 4.2.23, and then 4.2.23 down to 4.0.28 is ok. That is, if not up to 4.4.17,then 4.2.23 can down to 4.0.23.

      Thanks.  

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            Unassigned Unassigned
            chenhuayun@sina.com nycle chen
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